Find an efficient kitchen exhaust hood by seeking an Energy Star–rated model, which is quieter and uses 65 percent less energy. Once you have an efficient model, do not be conservative with its use. Your ventilation hood is essential to keeping your indoor air quality safe by getting rid of:
Excess moisture. Cooking can introduce 2 to 3 gallons of moisture into your home's air per day. If it's not properly released, this can lead to moisture problems in the home.
Hazardous combustion by-products from gas cooktops mentioned earlier.
Your hood needs to exhaust to the exterior, ensuring removal of moisture and pollutants from your interiors. Stay away from recirculating fans, which only remove odors. Also avoid downdraft hoods, which do not perform as well as hoods mounted overhead.