Many Kansas City area homes are well-insulated and sealed almost airtight. Unfortunately, without proper air circulation, your home becomes susceptible to excessive moisture, stale odors and possibly mold.
Excess moisture can be created inside by water infiltration through the foundation, or more commonly by condensation caused by variations between temperature outside and inside your home. Below, we explain how properly selected and installed ventilating fans can create the necessary airflow to avoid these problems.
The first question is, does your home have the enough ventilating fans to optimize circulation? At a minimum, the kitchen and every bathroom should have an exhaust fan, and these fans need to be turned on whenever you’re cooking or showering. Additionally, make sure you have installed ventilating fans wherever you notice seemingly damp or stuffy rooms, such as basements, garages and attics. If you do have these fans in use, they need to be regularly cleaned to prevent accumulations of dust and grease, which reduce the fans’ effectiveness, and could create a fire hazard.
Also, to sufficiently ventilate your home, each exhaust fan must have the correct capacity for its location. A common measure of efficiency is Cubic Feet per Minute (CFM) for evaluating the capacity of air movement. Industry leaders at the Home Ventilation Institute have issued guidelines for adequate air circulation. For example, an average residential bathroom requires fan capacity of one CFM per square foot of space.
Another important consideration is where your ventilating fans exhaust air. Older homes may run the exhaust vents into the attic, which should be avoided since you don’t want moisture collecting in that space. These ventilating fans should exhaust outside of your home. Even so, moisture could get trapped if the vent exits under an eave. Make sure there is enough clearance to allow the exhaust to dissipate freely into the atmosphere.
For more expert advice about ventilating fans and other issues related to home comfort, please contact us at LBA Air Conditioning, Heating and Plumbing. We’ve been serving the Greater Kansas City area for 25 years.
Our goal is to help educate our customers in Kansas City, Kansas about energy and home comfort issues (specific to HVAC systems). For more information about ventilating fans and other HVAC topics, download our free Home Comfort Resource guide.
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