When creating an energy-efficient, airtight home through air sealing techniques, it's very important to consider ventilation—the exchange of indoor air with outdoor air—to reduce indoor pollutants, moisture, and odors. Contaminants such as formaldehyde, volatile organic compounds, and radon can accumulate in poorly ventilated homes, causing health problems. Excess moisture in a home can generate high humidity levels. High humidity levels can lead to mold growth and structural damage to your home.

    Kitchen Hoods

      In any kitchen, the selection of the ventilation equipment is just as important as the selection of the cooking equipment. There are three components of a ventilation system. All three of these components must work together in unison to provide proper ventilation. Any deficiency in one of these three areas may result in the range hood not performing to its full potential.

      The three components are:
      1. Hood Canopy
      2. Blower System
      3. Ducting

      Before proceeding to the selection of the correct ventilation system, the type of cooking equipment must be determined. The hood canopy, blower system, and ducting should be designed to handle the heat output of the cooking equipment, measured in watts for electric cooking equipment, and btus for gas cooking equipment. There's no exact science for determining your blower requirements-if you never have all your burners on at once, you don't need to buy excessive capacity. To locate on the following chart the blower that's appropriate for you, consider the type of hood you want, the type of equipment you use, and your cooking habits-whether you use all or only part of the BTU/WATT value of the cooking equipment. Note: Multi-burner cooktops are not generally operated at full capacity, whereas BBQs, woks, and griddles are often operated at full capacity.

      Bathroom Fans

        Bathroom exhaust fans are vital components of your home's ventilation system. Bathroom fans not only exhaust offensive odors, they also pipe vast amounts of humid air to the exterior of your home. Bathroom vent fans come in all types and sizes.