18.01.2015

Whole house attic fan sizing chart,online fan calculation cfm,ceiling kitchen hoods 80cm,fansided week 9 zwanger - Downloads 2016

Author: admin  //  Category: Childrens Ceiling Fans


QuietCool Fans Are Good For The Environment According to the EPA, if too little outdoor air enters your home, pollutants can form to levels that can pose health and comfort issues.
One way to lower levels of indoor air pollutants is to increase the amount of outdoor air coming in. Attic fans are installed in the attic near the gable vent and are designed to exhaust hot air from the attic space. A Whole-house system can be used instead of an air conditioner most of the year in most climates. Based on the fantastic savings realized by homeowners on their electric bills by using whole house fans to cut air conditioner usage, California State Legislators have now recognized the benefits of whole house fans. When the outdoor temperature is lower than the indoor temperature, open a few windows in your home and switch on the whole house fan. The whole house fan pulls air in from the open windows and exhausts it through the attic and roof. A common concern of using a whole house fan is that many models can be noisy, especially if installed improperly. Cooling your home accounts for a large percentage of your energy bill, especially in warmer climates, because air conditioners require a lot of electricity when in use.
Many air conditioners are designed to recirculate the same air over and over, which can result in stagnant, musty air over time. When whole house fans are installed properly according to the size and needs of your home, the result is comfortable living. Synergy Companies was established in 1981 in the San Francisco Bay Area starting with home insulation, and expanding to energy efficiency and solar generation. Please match up the shutter as close as possible to the overall size or rough opening size.
Whole house cooling using a whole house fan can substitute for an air conditioner most of the year in most climates. Whole house fans combined with ceiling fans and other circulating fans provide acceptable summer comfort for many families, even in hot weather.
How Whole House Fans Work The whole house fan pulls air in from open windows and exhausts it through the attic and roof. Efficiency Matters, LLC provides top quality Home Energy Audits and Home Energy Ratings using the latest technology, detailed analysis, and detection.
Greg has been involved with residential construction and green building for the last 10 years. Christopher’s carpentry experience began 14 years ago in college restoring a home in Flagstaff, Arizona. Mike Rodriguez has more than 15 years’ experience in construction management and has spent the last 7 years specializing in green building. In the past, it didn't matter much that it was cooler at night: I simply couldn't get any of that cool air into the house. There's some additional savings in that I had been planning to install a ceiling fan in the master bedroom. Greg is one of the best and I would not hesitate to recommend him for improving the energy efficiency of your home. Seamless one piece steel flashings ensure fast, hassle-free installations on virtually any roof type and pitch. Seamless one piece steel flashings ensure fast, hassle-free installations on virtually any roof type and pitch.
Solar Stars plug and play" technology means easy hook-up to any of Solar Star's Roof Mount Vents. We are delighted to present the fantastic Air Vent Inc 24 Whole House Fan 54301 Attic Whole House Fans. For this price, the Air Vent Inc 24 Whole House Fan 54301 Attic Whole House Fans comes highly recommended and is always a popular choice for lots of people. An attic-mounted whole-house fan pulls hot air into the attic space (where it exits through vents) while drawing cooler nighttime air into the living-space through open windows. To improve whole house airflow, and reduce the visual impact, fan intakes are often centrally located in hallways.
BeginnerWhole-house fans, sometimes improperly referred to as “attic fans,” are a class of fan that exhaust air from a house, drawing in fresh air through open doors and windows. Whole-house fans have been in use in the United States for much of the last century, although their mass appeal has been eroded by the availability of air-conditioning and inexpensive electricity. Natural or “free cooling” is based upon how much cooler the outside air is than inside air. A rare, but promising application of whole-house fans is to incorporate ground-source cooling.  If you have a basement that stays cool all summer, you effectively have the basis for a ground-source cooling system. Is lower cost more important than features like automatic louvers, low noise level, and power use? California has relatively high electrical rates that rise rapidly as electrical consumption increases (tiered rates). Sacramento houses require cooling during a significant portion of the year (see graph, above). Climates that undergo large temperature drops at night (10°F or more below indoor temperature) and houses with lots of thermal capacity are ideal matches for whole-house fans.


The most basic whole-house fans are equipped with self-closing dampers (aka backdraft dampers), which close by gravity and open when air pushes against them. Since whole-house fans discharge into the attic, it must be sufficiently vented so that pressure does not build up. Foregoing modeling—and ignoring the best way to save on cooling energy (sweating it out or heading for the lake)— it’s possible to compare how much energy a whole-house fan versus air-conditioning will save. A larger airflow can compensate for smaller inside-versus-outside temperature differentials, such as those that occur in the early evening or during humid weather. The simplest method to determine the economic viability of a project is to use “simple payback”—dividing the capital cost by the annual savings. Environmentally minded folks might be interested in calculating their carbon offset in cost per ton of carbon dioxide (CO2) avoided. Whole-house fans allow homeowners to naturally achieve comfortable indoor conditions while minimizing energy use and improving indoor air quality. Neil Smith has spent the last quarter-century in the HVAC world, having obtained a degree in building engineering.
Some of the newer style of whole house fans are extremely quiet and do not require any framing. I just turn on the bathroom exhaust fans to do suck warm air up and out--shouldn't this have the same effect as a whole-house fan? Yes, they both are installed in the attic and in similar ways provide cooling to your home. Attic fans are designed to remove hot air from the attic space, but do not pull air from the living area.
Similar to attic fans, whole-house fans push hot, stale air out of the attic to help cool your home, office or building. In addition to whole house fans, the ducts of your central heating and cooling system can be modified to provide whole house cooling. His experience progressed to historic restoration for the state of Colorado with court houses, high schools, and homesteads. Mike began his “green” work at Energy Logic as an energy auditor and rater for new construction and existing homes. He enjoys snowboarding and travel but most weekends are busy watching his son’s football, baseball, and lacrosse games. We really appreciated that he told us about many improvements that we could do ourselves (and exactly how to do them), in addition to completing two larger improvements for us. The Air Vent Inc 24 Whole House Fan 54301 Attic Whole House Fans is certainly that and will be a superb purchase. Whole-house fans are used to cool a house when the outside air temperature is lower than inside (see figure), and are a convenient and innocuous way to provide inexpensive cooling. For houses with existing air-conditioning, the most basic strategy is to use whole-house fans to eliminate air-conditioning use at night.
Your climate and personal comfort will help determine if you can use a larger whole-house fan to extend the time when air-conditioning is not required. This involves running a whole-house fan all night, bringing in cool air so that the building is as cool as possible the next morning. A low-cost way to take advantage of this cooling is to open one or more basement windows, and run a whole-house fan during the day. The homeowner has just finished paying another $600 summertime electrical bill and he wants to slash that cost. To reduce noise from the fan, you’ll need to consider acoustic reflection or simply the distance the fan will be from listeners. Typically, cutting joists is unnecessary—the area directly below the whole-house fan is framed to form a channel for the air and support for the grille or backdraft damper. These backdraft dampers offer basic protection against debris (and rodents) from entering the house, but have no insulating qualities. Otherwise, fan performance can be jeopardized and pressure buildup could force air back through openings in the ceiling, along with dust and other particulate matter. To figure dollars per ton of CO2, take the capital cost of a project and divide it by the lifetime avoided carbon dioxide emissions. This is a simple project that springboards on existing technology, and by economic and environmental measures, offers a quick payback on investment. The truth is they are very different and understanding how these products work is important, so you can purchase the proper product to help cool and ventilate your home.
However, instead of simply pushing the hot air out of the attic, a whole-house fan pulls cool air into the home through an open window and flushes hot air out of the home via your attic vents.
With a whole house fan, you can open up the windows when the temperature outside is cooler than inside your home.
He owned and operated a private contracting company that focused on remodel and new builds for private clients and has currently partnered with the Efficiency Matters team. During his time with Energy Logic he saw a real need in the industry for a reliable and knowledgeable contractor to perform energy retrofits and green builds.
And that was my own fault because I had two crock pots going full bore in the kitchen most all of that day. A pre-cooled structure will stay cool longer the following day, saving additional air-conditioning use and providing comfortable conditions later into the day.


The other inhabitants of the house are noise-sensitive and will make little or no lifestyle changes to save energy.
Because of decorating choices, and the fact that it’s a central location for airflow, the vast majority of whole-house fans are installed in hallway ceilings. Whole-house fan manufacturers publish the requirement for attic ventilation in terms of square feet of net free area. It took him a couple of hours to install it and after he completed the job he said it was the easiest whole house fan he ever installed.
The hot attic air gets trapped in the attic, and attic fans can be effective in pushing the hot air out which in turn helps to cool your living space. Whole house fans cost much less to operate than air conditioning and are relatively easy to install.
The powerful fan pulls cool air in through the windows and up into the attic, pushing the hot air out of your attic through the vents. He owned and operated an energy retrofit company and soon after partnered with Efficiency Matters where he is able to combine his passion for energy efficiency and general contracting while helping homeowners save money and improve overall health and comfort in their home. As first-time homeowners, this was a great investment for us and we are very happy with the company we chose. The only lifestyle change required is to turn off the air-conditioning, switch on the fan, and open windows on cool nights. As whole-house fans become available that have good power unloading (reduced energy use at low speeds), this upsizing becomes more practical.
For homes with sufficient thermal mass, the entire house can be pre-cooled sufficiently to eliminate air-conditioning. For example, climates with hot, humid summers can make use of natural cooling during the spring and fall. Airflow paths through the house can be determined by which doors and windows will be opened to ventilate the house.
For houses without attics, homeowners may choose alternate fan locations, such exhausting to a garage or crawlspace.
If a homeowner opts for a non-insulated model (they are significantly cheaper), then manually insulating the fan in winter is highly recommended. This parameter (also known as net free ventilation area—NFVA) was devised to approximate the equivalent of an unrestricted opening.
Attic fans are thought to be helpful in extending the life of your roof structure and other components. A whole-house fan that has enough airflow to maintain cool sleeping conditions “most of the time” would be selected, which translates to a minimum airflow per bedroom of 500 to 700 cubic feet per minute (CFM), depending upon local climate. There are a limited number of roof-mounted whole-house fan on the market, although this market will undoubtedly grow as more sealed attics are built.
Several whole-house fans use a remote fan connected to the plenum box with flexible ducting, which is a great acoustical attenuator. As shown in the table (above), velocity through each vent should be about 500 feet per minute to maintain a safe attic pressure. Attic fans, especially the new gable attic fan with an energy saver motor, draws very little power, saving energy while working to cool your home. Quiet whole house fans are also energy efficient and rebates are available from many energy or electric companies to help offset the cost of installing a whole house fan system. Pulling air through a duct consumes extra electricity, a consideration when you’re weighing energy use. Most roof vent manufacturers will stamp the net free area required on the vent body as well.
There are many factors that affect human comfort, from temperature and humidity to individual sensitivity. However, with careful selection of motors and fan blades, this energy cost can be minimized. If manufacturer’s data is not available, several online venting calculators are available (see Access).
With enough airflow (think: motorcycle riding), one can be cooled in almost any temperature.
However, at some point, the energy to pull all that air with a whole-house fan will be more than using air-conditioning.
In a related job, I used a hacksaw blade mounted in a frame designed for cutting in tight places, which lets the blade extend out. Instead of doing that, I’m now thinking of having the whole-house attic fan installed. So, I get that it should be mounted OFF the floor, correct?House is just over 3,000 square feet.Could someone recommend a fan brand and model for this application? To cover for the winter, I saved the cardboard box the fan assy was packaged in and reused the lid. Now I think I have to do something a little better because as I walked in the hall the other day, I couldf feel a draft.



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