Whole house attic fan 20 inch yoshi,room fan summer winter,fan regulator price in delhi mandi - Downloads 2016

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The most common kind of residential ventilation fan is one used to provide fresh air for building occupants.
A powered attic ventilator has a different purpose: it is designed to lower the temperature of an attic by exhausting air from the attic and replacing attic air with outdoor air.
Whole-house fans are used to cool a house at night, when the heat of the day has passed and the outdoor temperature has dropped enough to feel comfortable. The main advantage of using a whole-house fan instead of an air conditioner is to save energy.
In most cases, a whole-house fan is mounted in the attic floor, above a rectangular grille in the ceiling of a central hallway. Since a whole-house fan blows all of the hot air from the home into the attic, the fan won’t work effectively unless the attic has large openings to exhaust the hot air. Here’s the rule of thumb: you need one square foot of net free vent area for every 750 cfm of fan capacity. Manufacturers of ridge vents and soffit vents provide information on the net free area of ventilation per linear foot of their products; for example, this page from the Air Vent website lists different ridge vent products that provide between 9 and 18 square inches of net free area per linear foot of product. If you live in the right climate, whole-house fans are a great way to keep your house cool. However, even if you need to seal up your house and turn on your air conditioner during the hottest months of summer, a whole-house fan may be useful during the spring and fall seasons, when nights are cool but days remain hot. They don’t make sense for homes in neighborhoods where security concerns prevent homeowners from leaving their windows open. Because they depressurize a home, whole-house fans can cause atmospherically vented appliances located inside a home — for example, a gas-fired water heater — to backdraft. Whole-house fans represent a big hole in your ceiling — a hole that is likely to leak a lot of heat during the winter unless it is properly sealed.
One document posted online — “Whole-House Fan” — includes instructions for building a “box cover” for a whole-house fan. For a better approach, make a site-built cover as shown in the detail in GBA's CAD detail library. The second solution to the “big hole in the ceiling” problem: buy a whole-house fan from Tamarack.
Tamarack Technologies of Buzzards Bay, Massachusetts, makes the best whole-house fans available.
Tamarack HV1600 has two speeds (1,150 cfm and 1,600 cfm) and draws 230 watts at high speed. Tamarack fans have lower cfm ratings than most other whole-house fans, but the low power ratings confer certain advantages. Of course, since these fans don’t move as much air as a fan rated at 4,000 cfm, you’ll have to run the fan for more hours to get the same cooling effect. Now that we’re done talking about whole-house fans — the “good” kind of attic fan — it’s time to address powered attic ventilators — the “bad” kind of attic fan. Powered attic ventilators are usually mounted on a sloped roof or the gable wall of an attic. Although the logic behind powered attic ventilators is compelling to many hot-climate homeowners, these devices can cause a host of problems. In many homes, powered attic ventilators pull conditioned air out of the home and into the attic through ceiling cracks. As the cool air is being sucked out of the house through the ceiling, hot exterior air enters the house through other cracks to replace the exhausted air. Several studies show that even in a house with a tight ceiling, a powered attic ventilator uses more electricity than it saves. A more alarming problem: researchers in Florida and North Carolina have shown that powered attic ventilators can depressurize a house enough to cause water heaters to backdraft. John Tooley of Natural Florida Retrofit and Bruce Davis of Alternative Energy Corporation’s Applied Building Science Center in North Carolina conducted a field study to investigate powered attic ventilator performance.
One of the researchers working with Tooley and Davis was Arnie Katz, who wrote: “In most of the houses we’ve tested, the attic fans were drawing some of their air from the house, rather than from the outside. Researchers at the Florida Solar Energy Center (FSEC) have reached similar conclusions to those reached by Tooley, Davis, and Katz. Researchers at FSEC looked into solar-powered attic ventilators, and noted that the devices could, in some circumstances, reduce the electricity used for air conditioning. My favorite quote on solar-powered attic fans comes from Arnie Katz, who wrote, “In my opinion, powered attic ventilators are generally not a good idea, whether they’re powered by nuclear electricity, burning water buffalo dung, landfill-generated methane gas, or directly by the sun….
If you do have ductwork or HVAC equipment in your attic, the designer and builder of your home made a major mistake. Moving the insulation from your attic floor to the sloped roof assembly, creating an unvented conditioned attic. If you believe that your house has a hot ceiling during the summer, the solution is not a powered attic ventilator. Davis Energy Group of Davis, CA developed the Night Breeze system which does not require window opening to cool the house. The attic "coffin" you mention, which is used to air seal and insulate pull-down stairs, scuttle hole, or a whole house fan, is good in theory, but in practice, is cumbersome to install. The NightBreeze has been around for a while; I first wrote an article about the product 8 years ago, for an article that appeared in the September 2004 issue of Energy Design Update. I'm constantly up against folks who sell or have bought powered attic ventilators for use in Florida. Solar Attic Fans are easily managed and fixed and a great product for proper attic ventilation.
Standard asphalt shingle roofs is northern Vermont, where Martin Holladay lives, last 30 or more years, while roofs in south Texas last about 15 to 18 years. That 20,000 kWh would go a long way toward operating a pair of thermostatically controlled, powered attic ventilators (operated off the same thermostat) that had fans both blowing air into and out of the attic, through gable vents, with a balanced pressure so that air was not sucked through the ceiling of the house.
I get the idea that people that suggest a hot attic with a well-insulated ceiling have never crawled around an attic in south Texas on a summer day trying to string a TV cable or electrical wiring. Since the desert southwest is prime territory for whole house fans and a common building style is flat roofs with either no attic space or very minimal, non-accessible attic space, what is an appropriate detail for installing a whole house fan? Obviously, it depends on the average ambient temperature, humidity, and the nature of the attic. My guess is that way more attention should be given to creating a flawless air seal around the cover than to adding a few more Rs to the R-value. To determine whether your argument has any merit, we need to look at each of these three assertions in turn. A better option would be the TC1000-H fan from Tamarack -- a model with an automatic insulated damper that prevents heat flow and air flow when the unit is not in use. Let's assume that the insulated box in the attic measures 40 inches by 40 inches, and it is 24 inches high. Cold climates will have a higher ?T than I assumed, and warm climates will have a lower ?T than I assumed. Thank you, Martin, for showing me how to do the heat-loss calculation, and providing an example. Considering lower materials cost, easier fabrication, and simpler attachment and removal, I'm thinking that I would be very happy paying an extra $1-$6 per year to use an R-5 flat cover on the ceiling of the hallway. Most whole-house fans require a rectangular opening that is at least 32" x 32", and often larger; some whole-house fans are 48 in.
It is interesting that asphalt single warranties are based on having attic ventilation to code or the warranty is voided. If your attic doesn't have any problems, I wouldn't worry about adding more attic ventilation.
It's very easy to write that better insulation, radiant barriers, and light-colored roofs are components of a superior solution.
You have installed powered attic ventilators in two homes in recent years, so you obviously like them. Even if your anecdotes are accurate in all details, and even if you have no financial interest in promoting powered attic ventilators, two anecdotes aren't convincing. You have described two buildings with "hot ceilings." I have no idea why anyone with a hot ceiling would think it was easier to install powered attic ventilators than a layer of cellulose insulation. Here at GBA, we strive to advise readers of the simplest and best solutions to common building problems.
Well, to me two anecdotes are more compelling than one article, no matter how many times it's been re-written.
The most important variable, however, is the human beings involved and the particular situation they are dealing with. Energy engineering is way more complicated than telling people that there is but one solution to a problem. However, after having read the reports of researchers who have studied the issue and measured energy use in buildings with powered attic ventilators, I'm going to stick with the conclusions and advice of the researchers, even in the face of two anecdotes that buck the trend. I had hoped you would have done a little more research into other suppliers in order to offer a more unbiased view. Like so many other "plug in" solutions attic fans certainly have the potential to make things worse rather than better. The primary reason attic fans are not helpful is that they can depresureize the attic and draw air out of the house. The amount of air being drawn out of the house is a function of the pressure difference and size of the air leaks in the attic floor. If air leakage is minimized, and depressurization is controlled with either a balanced fan or adequate openings for incoming air then it seems reasonable that the amount of depressurization would minimal and the attic fan could be beneficial. Arnie Katz's study concluded that (an undefined amount of?) depressurization was enough to increase cooling costs. If the house without AC running was closing the windows during the day to keep the house cooler, then any air being exhausted to the attic would be replaced by warmer outdoor air, but that warming of the house is tempered by a cooler ceiling. You propose the question "who cares how hot the attic is if there is enough insulation in the attic floor?" Insulation can only slow and not stop the energy transfer. If you install a powered attic ventilator, there is one thing you can be sure of: your electricity bill will go up. Just because insulation slows down heat transfer rather than stopping it, doesn't mean that insulation isn't the best (and most cost-effective) way to prevent hot attics from making homeowners uncomfortable. You wrote, "Everything else being equal, any house would benefit from a cooler attic." That statement is only true during the summer.
Yes, of course more insulation with no moving parts and year round benefit is the better option. In a house with no ac running and the windows open there has to be some level of cooling benefit from lowering the attic temp with an attic fan. Of course if the attic fan isn't working correctly and is running all year long that would be a significant problem. Also, living in West Texas (think El Paso or Lubbock) 'swamp coolers' work great for all but about 2 days a year.
Ahh, the differences from living in the NE and the SW (and the South) is really different on how we live with our environment. No returns or exchanges, but item is covered by the eBay Money Back Guarantee - opens in a new window or tab. This item will be shipped through the Global Shipping Program and includes international tracking. Will usually ship within 1 business day of receiving cleared payment - opens in a new window or tab. By submitting your bid, you are committing to buy this item from the seller if you are the winning bidder. By clicking Confirm, you commit to buy this item from the seller if you are the winning bidder. By clicking Confirm, you are committing to buy this item from the seller if you are the winning bidder and have read and agree to the Global Shipping Program terms and conditions - opens in a new window or tab. Your bid is the same as or more than the Buy It Now price.You can save time and money by buying it now. To post questions, help other DIYers and reduce advertising (like the one on your left), join our DIY community.
I installed the AirVent 24" direct drive whole houe fan (this model) in my ~1500sqft house last year. If the fan blades were perfectly symmetrical then there would be no up or down, but they probably have a hub and some specific shape. Hey, so someone has recommended that I replace two of the eyebrows with half round dormer vents.
Whatever you need to do to get the net free area that will be cheapest and easiest will work. I'd optimistically guess that the soffitt venting you have is maybe 6 sq in of free area ea? So, Spring has rolled around again, and it's got me thinking about making my whole house fan work. So, thinking that it's an attic exhaust issue (that seemed to be the consensus of the previous discussion, right?), I was thinking about putting in some gable vents. I have been looking for triangle gables, as shown in ray2047's photo, but most that I see at Home Depot or Lowes online seem to be just for looks--ie, they have very low net free area (NFA). I guess I could try to put in two of the 14x24 gables to give just over an additional 2 sqft of attic ventilation. Before you add the new venting, lets be silly and back up to GG's original comment about fan blades being on in the correct direction. I searched your fan link and did not find any reference, but it would be a shame to overlook something this simple. For someone who has never installed one, I wish the instructions were more detailed, but I guess I get it in general. I was thinking: prior to cutting a hole in my exterior wall, should I make sure the box I build around the whole house fan is air tight?
The good news is, there are dozens of tricks to cooling off that don’t require a great deal of money.
Sometimes, the worst part of a hot summer is trying to sleep through a sticky summer night. GoodtoKnow is a leading women’s lifestyle website from the UK that delivers recipes, health information, and money-saving advice.
In this Her Campus blog post, Erica Avesian gives us permission to invoke our inner child while cooling down by suggesting we make our own slip n’ slide. Natasha Courtnay-Smith and Charlotte Dovey offer 20 hot tips to stay cool in this Daily Mail post.
In a delightful infographic for Secret Tips from the Yumiverse, comic book artist and illustrator Yumi Sakugawa offers 8 Weird Ways to Cool Down for Summer. The Mother Nature Network blog post, 5 Unusual Ways to Stay Cool by Chris Baskind, encourages you to go tropical to beat the summer heat.

After you make tea, save the tea bags and wrap them in a towel or seal them in an airtight container to keep in the moisture. Instead of soaking up the hot sun, SheKnows recommends that you soak up some culture by visiting museums. This Home Guide for SFGate by Damarious Page offers tips and advice for cooling single rooms or keeping your home cool when air conditioning is unavailable. Kids love to play with ice, and you can make it even more fun by playing the ice cube games suggested by the National Wildlife Federation for Kids. Getting sleep on the sweltering summer nights is tough, especially if you have bedrooms on an upper level of your home or if you live in an upper-level apartment.
The National Sleep Foundation shares information about the importance and benefits of sleep, and their article, Sleeping When It Is Blistering Hot, offers some helpful tips for getting restful sleep, even during the dog days of summer.
Pouring water over your wrists and neck helps you cool off quickly, but Whitson Gordon’s Lifehacker post, Know Your Body’s Quick-Cooling Spots, provides information about all of the body’s best cooling spots and the most effective ways to use them.
Canidae’s Responsible Pet Ownership Blog is a terrific resource for keeping your pets healthy and happy. The German Shepherd Rescue of Southeastern Pennsylvania (GSR-SP) is devoted to saving and rehoming purebred German Shepherds that have been abandoned, orphaned, left at a shelter, or are in need of a home. Cats need to stay cool during the summer months, too, and JaneA Kelley of Catster shares her 10 Ways to Keep Your Cat Cool in Summer Heat to help cat owners and lovers make their feline friends more comfortable.
The Human Society of Charlotte, North Carolina, offers some hot weather tips for dogs so their owners can keep them safe and cool during the summer. In this Rodale’s Organic Life article, Jean Nick offers energy-free ways to cool your home.
Daniel Branch is the man behind Personal Development 123 and Daniel’s Personal Development Blog. In this Good Housekeeping article, Dan Shapley offers 8 ways to stay cool without air conditioning. Woman’s Day seeks “to help you find value every day,” and they certainly do that in their article, Beat the Heat Without Spending a Dime. The Humane Society of the United States (HSUS) is a national animal welfare organization dedicated to protecting animals and preventing animal cruelty. In this CPS Energy blog post, Albert Cantu finally answers the question: “Should I turn my air conditioner off or leave it on when I’m not home?” While it may be tempting to turn off the air when you are not at home, it is much better to turn the thermostat up, not off. Apartment Therapy’s article, How to Stay Cool This Summer: 50+ Tips to Beat the Heat Without Blowing Your Budget, acknowledges that most people do not want to spend their summer budgets on cooling their homes with an air conditioner.
Trisha Wagner posted these money-saving tips for staying cool this summer on Leave Debt Behind. Chris Baskind’s 20 Ways for Renters to Stay Cool and Save Money This Summer offers ways to lower utility bills and improve energy efficiency while staving off the summer heat. Scott Sundblom understands that air conditioning may be an expense that you cannot afford, so he offers some tips to stay cool without busting your budget.
The Muffler is specially designed to raise the HV1000, HV1450 and HV1600 off the attic floor joist by 12". Unlike a ventilation fan, a whole-house fan — an attic-mounted fan that exhausts air from a home at night — is designed to cool a house (that is, to lower the indoor temperature). A whole-house fan usually draws between 200 and 700 watts — about 10% to 15% of the power drawn by a central air conditioner (2,000 to 5,000 watts).
It makes no sense to introduce lots of (potentially humid) exterior air into a house at night if you intend to turn on an air conditioner the next day. Once the outdoor temperature cools down — usually in the evening or early morning — the homeowner opens a few downstairs windows, closes the fireplace damper, and turns on the fan. Since whole-house fans are relatively powerful — they are usually rated between 2,000 cfm and 6,000 cfm — they quickly exhaust the hot indoor air, allowing cooler outdoor air to enter through the downstairs windows. Most old-fashioned whole-house fans require more attic venting than the minimum amount required by the building code — anything from a little more to about twice as much, depending on the size of the fan.
The vent area can be made up of a combination of soffit vents, ridge vents, and gable vents.
The traditional recommendation is to choose a fan that can move between 15 and 20 air changes per hour (achACH stands for Air Changes per Hour.
If you live somewhere where the temperature stays in the 80s all night long, a whole-house fan won’t help you much. However, newer models of whole-house fans — especially the Tamarack HV1000 — are quieter than traditional whole-house fans with higher cfm ratings. Unfortunately, the document suggests that it’s acceptable to build a cover insulated only to R-5. Or you can follow the advice given by Erik North in his blog on building a “coffin” for insulation pull-down attic stairs. Since Tamarack fans include motorized doors insulated to R-38 or R-50, you won’t have to climb up into your attic twice a year to wrestle with an insulated box if you install a Tamarack fan.
Most powered attic ventilators are controlled by a thermostat so that they turn on when the attic gets hot.
The installers of powered attic ventilators hope that the exhausted air will be replaced by outdoor air. Installers evidently hope that a powered attic ventilator will save more energy that the electricity required to run the fan. Here’s the basic problem: a powered attic ventilator will depressurize your attic, and it’s hard to predict where the makeup air will come from.
The net result: the air conditioner has work harder than ever as it struggles to cool all that entering outdoor air.
Since backdrafting sometimes introduces carbon monoxide into a home, the phenomenon can be dangerous. According to an article published in Home Energy magazine, “As a result of this research, Davis said that he wouldn’t recommend the use of powered attic ventilators. In other words, they are cooling the attic by drawing air-conditioned air out of your house and into the attic.
In an FSEC publication called “Fans to Reduce Cooling Costs in the Southeast,” researcher Subrato Chandra wrote, “Data measured at FSEC and elsewhere show that attics with nominal natural ventilation and R-19 ceiling insulation do not need powered vent fans. In hopes of answering critics who complain that these fans use more electricity than they save, the industry has developed powered attic ventilators equipped with small photovoltaic panels. In their report, Performance Assessment of Photovoltaic Attic Ventilator Fans, however, the researchers concluded, “Based on the matching period analysis, estimation of annual space cooling savings are on the order of 460 kWh. The solution is to seal any air leaks in your ceiling and to add more insulation to your attic floor. The thermostat-like control unit also regulates the operation of the air conditioner, if any. When the control predicts relatively mild weather, the ventilating blower will run at a lower speed than when hotter weather is predicted.
Most who have them "get it" when I explain that conditioned air is pulled up out of every ceiling penetration. The best way to lower the temperature of asphalt shingles is with a powered attic ventilator. The best way to lower asphalt shingle temperatures is to choose white-colored shingles over black shingles. You can adjust the assumptions to fit your own case and run your own calculations if you want. But as long as you're making a cover, why not use at least 2-inch-thick rigid foam instead of 1-inch-thick foam? I've recorded temperatures up to 180 deg F on back side of asphalt shingles in the California summer sunshine and attic temperatures of 160 deg F. I've measured attic temperatures with various types and amounts of attic venting and there is really little effect that can be detected with venting on attic temperature.
Of course if you want to make lemonade out of that lemon, use the attic heat to preheat water and call your roof a solar collector. In the summer, the upstairs bedrooms are unbearably hot, due to the ceiling radiating attic heat. Needless to say, there are all kinds of reasons that electric bills fluctuate from one month to the next; one of the biggest reasons (when it comes to air conditioning) is variations in weather. I'd like to repeat my advice: if you have a hot ceiling, install more insulation on your attic floor. I have been a professional energy engineer for 2 decades; I understand that there are many variables that account for enrgy use. In both of my anecdotes, the human beings felt that the cost in money, time, work, and hassle would not have sufficient return in comfort.
As a curious professional, I was willing to risk the investment to see for myself what effects are. I certainly appreciate the information, as I appreciate all information provided by GBA readers. Of course, a fan cannot cool your garage unless the outdoor air temperature is lower than the indoor air temperature. Tamarack is a fine company with leading edge insulation technology but you do your readers a disservice by inserting your opinion that they "make the best whole-house fans available". The problem is that in most cases, there is no one available to accurately make that determination. Many houses have significant leaks in the air barrier(attic floor) and it would be easy for the attic fan to draw a significant amount of air from the house. In an attic with gable vents, soffit vents, and ridge venting, I suspect that the attic fan would not create a significant pressure difference and the air leakage from the house is probably small. Regardless of what the insulation level is, there will be some level of energy transfer from the warmer attic to the cooler house.
I know of two houses using them and the owners are certain that they make a large difference in comfort. Believe it or not, many homeowners with powered attic ventilators leave them running all year long, because they forget to turn them off or the thermostat breaks. In those cases the options are to "sweat it out", cool the poorly insulated house with a large AC system, or try to limit the heat gain to reduce the temperature in the house. The same can be said for any mechanical equipment in the house that is not operating correctly. Packaging should be the same as what is found in a retail store, unless the item is handmade or was packaged by the manufacturer in non-retail packaging, such as an unprinted box or plastic bag. You have read and agree to the Global Shipping Program terms and conditions - opens in a new window or tab.
Import charges previously quoted are subject to change if you increase you maximum bid amount. What you are doing is like trying to use a drinking straw on a shop vac instead of a two inch hose.
Cut a hole, put a generous bead of caulk around the hole, push in the premade vent and secure with screws.
Or, maybe you don’t have air conditioning and really don’t want to spend hundreds of dollars purchasing window units and paying astronomical electric bills.
Some of our tips are completely free, while others require a bit of money up front to save a lot of cash in the long run. This Greatist blog post by Sophia Breene offers 24 ways to survive hot summer nights without air conditioning, and we think her tip to sleep alone makes perfect sense. Their blog post, 11 Ingenious Ways to Cool Down Fast, offers a way to cool off that we never considered: put your moisturizer and other lotions in the fridge. If you have kids, there is a good chance your slip n’ slide is torn from last year, anyway, so you might as well save some money and do a DIY slip n’ slide by finding an old tarp, spraying it with a hose, and enjoying the cold, slippery ride. Chris suggests that we do as those who live in tropical climates do when the temperatures rise in our area by wearing loose, lightweight cotton and linen clothing. As she points out, capsaicin in hot foods triggers perspiration; by eating the spicy food, you are sweating and cooling off without raising your body temperature. Art museums, science museums, history museums, and children’s museums are perfect places to visit to escape the heat, and you can check to see if there are any special exhibits scheduled to make your visit even more enjoyable. One tip some people forget to follow during the summer months is to reverse their ceiling fan blade rotation from the winter setting.
Jazz up your ice cubes by adding food coloring to the water in the ice cube trays before freezing them. It’s not just hard to fall asleep when you’re hot, but it’s hard to stay asleep when you’re hot. Preparing your sleep environment to prevent excessive heat build-up is a smart way to sleep more comfortably and save on your electric bills, whether you run your air conditioner or fans to stay cool.
By getting to know your pulse points, the “areas where you can feel your pulse because your blood vessels are close to the surface of your skin,” you can cool down your blood and body temperature by putting the areas in contact with cool water.
In her blog post, Tips to Help Your Dog Stay Cool in Hot Weather, Laurie Darroch reminds us that dogs have a tough time cooling down because they have less efficient body cooling systems than we do. Because dogs’ health and safety is at the heart of all they do, the GSR-SP provides summer safety tips for keeping your dog comfortable and healthy in the heat of summer. Amy Shojai’s 9 Ways to Keep Puppies Cool offers smart tips for keeping puppies cool on hot days. There are a few simple steps you can take without shelling out any extra money to protect your dog from heat-related problems, including staying off hot pavement.
Jean admits that it may be tempting to run the air conditioner, but knowing when to let the air in and when to keep the sun out helps you keep your house cool. He offers 50 Things To Do On a Hot Day to help take your mind off of the heat and help you cool down at the same time. His tips also are appropriate for people who do have air conditioning but want to save energy and money by reducing the need to use it. Their 10 unique tips are some of the most creative ones we have come across, and their suggestion to eat fruits and vegetables high in water content is a smart way to cool off during the summer. They offer tips for keeping pets safe in the heating and helping them cool down, including making a batch of quick and easy DIY peanut butter popsicles for dogs.
Because they are geared toward helping you save money, Springs Bargains is a great resource for inexpensive ways to cool off during the summer. Ihor Basko is a long-term veterinarian and animal lover who specializes in acupuncture, diet therapy, and holistic care. Bond’s 23 Tips for Keeping the House Cool from Care2 share the conventional wisdom everyone needs to know to stay as cool as possible during the summer months. Add sizzling temperatures to the mix, and parents aren’t sure how to help their baby sleep. To avoid the cost of purchasing or running an air conditioner, you need to keep your home as cool as possible.
While it may seem a little strange, using a white noise machine to listen to rain or waves actually makes you feel cooler.
If you have an air conditioner and want to use it when the heat becomes unbearable, changing the air filters is a quick and affordable way to save money and stay cool.

We like the idea of finding cool pillows that are designed to draw heat away from your head.
He suggests you opt for cool showers during hot summer days, rather than your regular hot showers. In the late evening or early morning, the fan is turned on to exhaust hot air from the house. Balanced ventilation system in which most of the heat from outgoing exhaust air is transferred to incoming fresh air via an air-to-air heat exchanger; a similar device, an energy-recovery ventilator, also transfers water vapor. If evenings are cool enough, it’s fairly easy to lower the temperature of your home and your furniture with a whole-house fan — sometimes in less than an hour. If you're using your air conditioner, keep your windows closed, 24 hours a day, so that the air conditioner isn't faced with an increased latent loadCooling load that results when moisture in the air changes from a vapor to a liquid (condensation). If the vent has insect screening, remember to make the opening 50% larger than the rule of thumb dictates.
But the best way to avoid backdrafting problems in a house with a whole-house fan is to make sure that the house doesn’t have any atmospherically vented combustion appliances.
The main disadvantage of this solution is that you have to climb up into the attic twice a year to install it and remove it. Moreover, since a Tamarack fan blows a smaller volume of air than the typical whole-house fan, it usually doesn’t require any extra vents in your attic. They also hope that the outdoor air will be cooler than the exhausted air, and that the effect of operating the fan will be to lower the attic temperature. Although the “smart arrows” in the sales brochures shows outdoor air entering the attic through the soffit vents, that’s not what usually happens.
Air conditioning the attic is not recommended by anyone I know as an effective strategy for reducing your bills.
Such fans cost more to operate than they save in reduced cooling costs, so they are not recommended.” Of course, if your ceiling insulation is deeper than R-19 — as it should be — there’s even less reason to worry about your attic temperatures. The biggest potential problem, says Rose, is that power venting can cause a negative pressure in the attic. In addition to providing nighttime ventilation cooling, the NightBreeze system provides year-‘round whole-house ventilation.
Your estimate of 15 to 18 years is much closer to the average here (as it appears to be in Texas). No other factor, including attic ventilation, plays as much of a role as do color and orientation.
However, if you really care about shingle temperatures, the best solution is clear: choose white shingles!
Click here to see a website with many inexpensive models of whole-house exhaust fans for flat roofs. In the real world, comfort, low first cost, and immediate gratification take precedence over theory and lab results.
The bedrooms can be filled with cool air, yet the hot ceiling makes them feel like being inside a broiler. But in the real world, we look for practical solutions that people will actually implement.
Don't install a powered attic ventilator, since these devices, on average, use more electricity than they save. If the attic fans didn't do the trick, then I'd move on to the next solution and be out only $100.
And I accept your assertion that you have no financial interest in promoting powered attic ventilators.
If you have radiant barrier sheathing, the temperature difference between the two spaces won't be very great, and probably won't be enough to justify the use of the fan. As a general rule unless a homeowner has a highly qualified person to evaluate their house, I think its safe to say that attic fans should be avoided. If a house has been air sealed by someone with an understanding of the air leakage, then it would seem that the depressurization would be minimal and the attic fan could then be beneficial. In a house not running an ac system any air being drawn from the house is being replaced by outdoor air. This increase in your electric bill is especially guaranteed in homes without AC (because there is no possibility that running the fan might decrease electricity devoted to AC). If a $100 attic fan (which consumes little electricity compared with an AC unit and contains far less embodied energy) can be part of a plan to reduce heat gain there may be a significant energy and environmental benefit compared to the AC option. If the attic fan keeps the house cool enough so that the owners leave the AC off, there is almost certainly an energy benefit. If you reside in an EU member state besides UK, import VAT on this purchase is not recoverable. No matter how you look at it, staying cool during the summer can be hard on you and your wallet. We also found ways to cool off all of the members of your family, from newborns to senior citizens – we even include ways to keep your four-legged family members cool this summer.
Your partner may not agree, but if you want to stay cool without shelling out any money, opt to be a lone wolf at bedtime. Imagine how good it will feel to put on your chilled moisturizer or lotion during those hottest of summer days. As they explain, “the larger the meal, the more metabolic heat your body creates breaking down the food. Specific tropical clothing suggestions include the guayabera, or Mexican wedding shirt, madras, and seersucker. We especially appreciate the spicy egg and feta burritos recipe Cat includes to get us on track for sweating away the heat. Most museums have free admission for children of a certain age, so you can get cooled off in their air conditioning without breaking your budget. For summer weather, make sure the blades are turning in a clockwise direction, pushing a fast, cooling breeze down and into the room.
You also can have races to see how quickly you can melt the ice cube and how quickly you can pick up the ice cubes with your feet. Deane Alban recommends that you get as low as possible for summer sleep, in her Be Brain Fit article, Too Hot to Sleep? The best pulse points to cool down are the insides of your elbows and knees, the tops of your feet, and insides of your ankles, your inner thighs, and the area of your head near your temple, just in front of your ear. According to Cesar, “the best activity you can do in summertime or hot weather is swimming. One way to use ice to help your cat stay cool is to drop three or four cubes into her water bowl before you head out on a hot day. Just as you don’t like to walk on hot pavement when it’s hot, your dog does not like to walk on it either. Some of his ideas will make you feel young at heart, and others will make you feel like an adventurer, but they all will make you feel cooler and better equipped to deal with the summer heat. One of his least expensive DIY ideas is to create a wind tunnel on nights that have cool breezes. Cucumbers and watermelon are among the best foods that help you stay hydrated, but you can also eat iceberg lettuce, celery, radishes, tomatoes, and others that are full of water. If you don’t want to use peanut butter, there are other options for whipping up some popsicles for your pooches. In her Springs Bargains article, How to Keep Your House Cool Without An Air Conditioner, Carrie Isaac gives detailed advice for keeping your home cool during the summer. Annie gathered information from Alex Wilson, Jennifer Thorne, and John Morrill’s Consumer Guide to Home Energy Savings as well as a few tricks from The Real Goods Solar Living Sourcebook to arrive at her 23 tips.
This BabyCentre article, approved by the BabyCentre Medical Advisory Board, suggests hanging wet towels over chairs or windows when it’s especially stifling, so that the evaporating water helps the air to cool.
That means you should skip the oven and use the grill to prepare meals so that you don’t add more heat to your home from the high temperatures generated by your oven.
Her Beat the Heat: 10 Ways to Keep Your Newborn Cool post provides great tips for preventing your newborn from becoming overheated.
If you don’t have a white noise machine and don’t want to invest in one, there are several sites available online that provide water sounds and several apps available that can make you feel cooler by listening to cool sounds. The air conditioner works more efficiently when the filters are clean, which saves you some cash on your electric bill.
They don’t require any power or special preparation and help control the 30% of body warmth that is dispersed by your noggin. Most people who have whole-house fans keep their windows closed from early morning until evening, so that the cool air inside the house doesn’t escape. ACH is often expressed as ACH50, which is the air changes per hour when the house is depressurized to -50 pascals during a blower door test. In our case it was a louvered opening about 30in square that we covered with a plywood piece every September or the attic would get really cold. In the two cases, I've described, the most practical (by far) solution was contrary to the conventional wisdom. The results of my experiments, so far, differ from this article and all the other ones that say the same thing. If the windows are open in the house there is no "cooling penality" to having some air exhausted from through the attic. But research has shown that, even in a house with AC, powered attic ventilators increase homeowners' electricity bills -- they don't lower them. If you are worried that your ceiling is still warm, the solution is simple: pile on a little more insulation. So, kick back and relax a little more easily this summer knowing that you won’t be stifling while saving your hard-earned money. Instead of walking the dog, take the dog on a swim!” Not only will you and your pooch cool down, but you will bond during the experience as well.
One budget-friendly tip for keeping your dog (and yourself) cool this summer is to rest in a shady, cool area.
On especially hot or humid days, try to save the exercise for early in the morning or after sunset. Amy suggests using misting fans or aerosols that put water into the air because they lower the temperature and keep pet fur damp. Dogs’ paw pads can easily burn on hot pavement, so it is better for you to avoid those surfaces when walking your dog. Sealing air leaks often is an inexpensive way to cool your house in summer and warm it in winter and lower your energy bills. Set one fan facing in on the side of your home that receives the wind, and then place another fan facing out on the opposite end of the house, in order to maximize the power of the natural, cool breeze.
The other good news is, you can grow a lot of these hydrating foods in your own garden and save money at the grocery store. Of course, it’s more important to always provide cool water for your pets, even when they are inside on hot summer days. We like her tip of delaying heat-generating activities with appliances until the right time of day, to help keep the house cool. She cautions parents against overdressing their baby during the summer and suggests that parents dress their newborns in natural fibers such as cotton, which allow babies’ skin to breathe and wick moisture away from them. In hot climates, the function is reversed so that the cooler inside air reduces the temperature of the incoming hot air.
The term ACHn or NACH refers to "natural" air changes per hour, meaning the rate of air leakage without blower door pressurization or depressurization.
The HV1000 requires a minimum of 3 square feet of net free vent area, and the HV1600 requires a minimum of 5 square feet. In one house we tested, we measured substantial levels of carbon monoxide (CO) in the daughter’s bedroom in the basement.
While the correlation between shingle temperature and longevity has not yet been definitively shown, it remains true that anyone concerned about elevated shingle temperatures should simply choose white shingles.
MIL was able to turn her thermostat up a few degrees, thereby saving energy and increasing comfort.
I report my findings not to argue or to be off-handedly accused of having financial interest, but to advance our understanding and knowledge.
One solution is to sleep on the floor instead of in your bed, because it may be a few degrees cooler. One of the simplest ways to stay cool and remain healthy during the hot summer months is to stay hydrated by drinking plenty of cool water.
At night time, open your windows when the temperature drops below the temperature inside your home.
Your dog may prefer to stretch out on a cool tile floor or in the shade of an outside tree.
You can place these on the porch or deck, or near the puppy playpen to help puppies cool off when the water evaporates. In the morning, wrap the bottle in a towel and place it in your cat’s favorite lounging spot. You also can add insulation, which is an up-front investment that pays of by saving you money year-round.
Daniel recommends filling water pistols with cold water and squirting friends and family to cool off in a fun and entertaining way.
Running dishwashers and dryers and using the stove and oven can generate more heat than you may realize, so hold off on using those appliances until very early morning or late at night. He will know how to find the cool spots, so you can follow him to those areas and cool off together.
As soon as the outside temperature drops below the inside temperature, pull the cold air in and push the hot air out by creating a cross-breeze with box fans in the windows. He recommends feeding your dog cold home-cooked meals or leftovers from the refrigerator to cool them off from the inside out.
The part of a balanced ventilation system that captures water vapor and heat from one airstream to condition another.
If you’re aiming for 15 ach, that means you need to divide your home’s volume by 4 to obtain the cfm rating of your fan. By the time I go to bed, the attic is cooler than the inside of my house, so it is drawing heat out. In cold climates, water vapor captured from the outgoing airstream by ERVs can humidify incoming air. If your ceiling height is between 8 and 9 feet, just multiply the floor area of your house by 3 to obtain the cfm rating of your fan. In hot-humid climates, ERVs can help maintain (but not reduce) the interior relative humidity as outside air is conditioned by the ERV.), as well as some types of bathroom exhaust fans.

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