Bathroom exhaust fans menards,fanshop werder bremen berlin,cheap hardwood flooring australia - Easy Way

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Bathroom Ventilation Fan Duct Lengths: What are the maximum & minimum recommended lengths for bath vent fan ducts?
BATHROOM VENT DUCT LENGTHS - CONTENTS: specifications for recommended minimum & maximum duct lengths for bathroom vent fans? Here we provide specifications for recommended minimum & maximum duct lengths for bathroom vent fans. This bath vent fan installation, troubleshooting, repair article series explains why bathroom vent fans are needed and describes good bath vent fan choices, necessary fan capacity, and good bath vent fan and vent-duct installation details. Our bath vent fan duct installation photo (above-left, courtesy Galow Homes) shows use of solid metal 4" ductwork conducting the fan exhaust to an outdoor soffit under a cathedral ceiling roof.
Any condensate in the ductwork drips to outside - a possible winter icing worry, but because of the solid foam insulation there should be little condensation in the fan duct.
Take a look at the vent fan installation manual for the particular bathroom vent you are installing.
In our photographs above, courtesy of Galow Homes, three long, un insulated bathroom exhaust fan ducts cross the cold attic floor of a New York home and then join together at a common sidewall exit of the same diameter. The bath vent fan installation manuals we reviewed did not specify a maximum exhaust duct length, they just say route the duct to the outdoors. Is there a minimum distance from your outside main gas line and meter that a bathroom fan can be vented out to at the side of your house?
I haven't seen a gas code specification for the required clearance between a bathroom exhaust vent fan outlet and an incoming gas line or pipe at the building, perhaps because an exhaust vent opening should be venting only one-way: from the building interior to the outdoors. If you are concerned that the exhaust fan flapper that should close to prevent back-drafts of outdoor air into the building could malfunction and admit leaking gas from an LP or natural gas pipe or from the gas vent found at an outdoor natural gas meter, if you match the TEN FOOT clearance distance required between an air conditioner air intake and an LP gas tank, since that is the largest clearance that applies for most residential building conditions you should be ok. We discuss gas piping and gas tank, regulator clearance and various building features in our article titled "LP Gas Tank Inspection & Reporting " - you can find the article by searching InspectAPedia for that title. You note the best practice is to terminate the bath vent duct: horizontally through the building wall at a building gable-end wall (first choice), or if the gable end is too distant. Longer duct runs provide more air resistance, a problem you can mitigate by using solid metal ducting or metal flex duct rather than the more sinuous plastic and wire flexduct often found in these installations. Readers needing depth in design theory and product recommendations for kitchen and bath ventilation systems should also see our BATHROOM VENTILATION DESIGN and KITCHEN VENTILATION DESIGN.
Continue reading at BATHROOM VENT DUCT MATERIALS or select a topic from the More Reading links or topic ARTICLE INDEX shown below.
Reader Question: is it OK to vent a bath vent fan straight-up, vertically out through the roof? I am going to install a new bath fan, I am having a new roof put on the house and decided now would be a good time to put the vent on the roof.
My question is I got a vent for 6" ducting, I will need a reducer at the fan end to 4" Would this be a good size duct for the fan.? Also I an using metal ducting and it's about six feet from the fan to the roof, Should I angle the duct a little or would it be ok to go straight up.?

You've raised several key topics, and your question helps us realize where we need to work on making our text more clear or more complete.
I prefer to run a bath vent to outdoors via a horizontal line that goes across an attic and out through a gable-end wall or one that vents down and outside through a roof overhang or soffit. The vertical run guarantees that any condensation runs back down into the fan (risking damaging the wiring or fan motor) and back into the bath or bath ceiling. The vent fan manufacturers installation instructions typically give maximum run lengths and recommended vent diameters for their products; long vent runs and vents that use plastic dryer-type flex-duct (not your case) cut the effectiveness of the fan by adding airflow resistance and thus increase the risk of accumulated moisture too.
I am guessing that for a very short bath vent duct run, going to a larger duct size is fine - it'd make no difference but you're probably not gaining a thing on a short run by using a 6-inch duct to vent a fan that expects to vent through a 4-inch duct. In my experience inspecting and troubleshooting buildings, I've seen many bath vent fans that seemed ineffective. The fan capacity you need depends on the size of the bathroom being vented - usually calculated in cubic feet.
Sorry that these notes are a bit long on arm-waving and short on more specific details, but as we've got no information about your particular installation except what's in your original note, I have to stop here. Questions & Answers on bathroom vent fan and fan ducting installation procedures, codes, standards. John Cranor is an ASHI member and a home inspector (The House Whisperer) is located in Glen Allen, VA 23060. Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. The Illustrated Home illustrates construction details and building components, a reference for owners & inspectors. When You Need More Power For High Heat-Loss Areas, BroanOS Large Capacity Wall Heaters are an Ideal Solution For Lobbies, Entrance Ways, Vestibules or any Area Requiring High Wattage Heating. A bath vent fan duct that is too short may violate the manufacturer's installation instructions, may not work properly, or may be drafty; a bath vent fan duct that is too long may restrict air flow such that the fan is not functional. Also we insulated the full outdoor soffit bay where the duct exits the building to avoid condensate icing.
There is little chance that these bath vents will work effectively and a good chance of pooling condensate in the low spots of the duct run.
To avoid unnecessary reductions in air movement through the bath vent exhaust system, avoid elbows and bends as much as possible. The bath vent exhaust duct shown in our photo (above left) continued to snake across the building attic - too long, too many turns, too much up and down variation in slope - it was an ineffective installation that collected condensate inside the ductwork.
Is it ok to vent the bath vent fan through a larger duct size than the fan's outlet diameter? A competent onsite inspection by an expert usually finds additional clues that would permit a more accurate, complete, and authoritative answer than we can give by email alone.
I prefer to minimize the number of roof penetrations on any building since every penetration is a potential leak point, more so if the penetration flashing is not installed correctly.

Metal duct work (your case) is in my opinion always a better installation: smooth interior means better airflow.
A fan that nobody uses because it's too noisy means a bathroom that is rarely vented adequately (risking mold, smells, even wet insulation). That figure is matched against the fan manufacturer's recommendations for fan capacity measured in cubic feet per minute (CFM). Cramer is a past president of ASHI, the American Society of Home Inspectors and is a Florida home inspector and home inspection educator. The text is intended as a reference guide to help building owners operate and maintain their home effectively. Our Low-Profile Models Feature an Energy-Saving, Built-In Fan-Delay Switch Allowing the Heating Element to Warm Up Before Fan Starts. This ventilation fan produces only 1.3 sones of noise while achieving 190 cubic feet per minute of air flow. I reviewed various industry sources and did not see a maximum allowable distance, but typically we see it's 10 - 12 feet or less. For example on site I might notice something about your attic and roof structure, ease of routing venting, placement of insulation, and even very basic stuff like - where the heck is your home? The CFM rating of the fan in turn presumes that the vent routing, diameter, length, and number of obstructing turns and bends is within the company's specifications. Bath ventilation worries may be a bit different in a cold climate than in a warm dry one and different again in a wet humid climate.
71-78, Association for Preservation Technology International (APT), available online at JSTOR. Special Offer: For a 10% discount on any number of copies of the Home Reference Book purchased as a single order.
The grill attaches directly to the housing with torsion springs and measures 15 inches square. Galow specializes in residential construction including both new homes and repairs, renovations, and additions.
Thanks to Alan Carson and Bob Dunlop, for permission for InspectAPedia to use text excerpts from The Home Reference Book & illustrations from The Illustrated Home. Carson Dunlop Associates' provides extensive home inspection education and report writing material. Special Offer: For a 5% discount on any number of copies of the Home Reference eBook purchased as a single order.

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