In terms of duration, we recommend running fans on high speed for 20-30 minutes to clear out excess moisture and odors. Higher speeds are used when bathing (50-110 CFM) or cooking (more than 100 CFM). The continuous or low speed setting is typically 30-50 cubic feet per minute (CFM). These fans typically have two speeds which can be controlled by a motion sensor or switch. Fan installation often costs between $500-1200. We recommend an ENERGY STAR-rated bathroom exhaust fan or kitchen range hood that is rated for quiet and continuous operation.
What Type of Ventilation Do You Recommend? Bathroom ventilation fan Mechanical ventilation, in the form of exhaust fans, allows homeowners to better control the breathability of their home. The issue isn’t that these homes are too “tight”-it’s that they not “breathing” properly. Typically, newer or recently air-sealed homes have less natural ventilation, which means these pollutants aren’t regularly flushed out of the home. Contaminants like formaldehyde and volatile organic compounds (VOCs) can accumulate and may cause health problems in poorly ventilated homes. Too little ventilation can allow unpleasant odors to linger. Moisture from cooking and bathing need to be removed before high humidity levels lead to mold growth and/or physical damage to the home. Homes without adequate ventilation can experience a variety of problems with indoor moisture, odors and pollutants.
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