The purpose of attic ventilation is to equalize temperatures inside and outside the attic throughout the year. In summer, this equalization of temperatures helps make the living areas beneath the attic cooler and more comfortable; this can help reduce how hard the air conditioner needs to work, thus lowering its operating costs.

Ventilate your bathroom to prevent moisture buildup and related problems. How do you know whether or not your bathroom's ventilation system is adequate? The following are guidelines for ventilating both large and smaller bathrooms using intermittent or continuous ventilation.

The majority of the balanced ventilation systems on the market are heat recovery ventilators (HRVs). Most HRVs consist of an insulated cabinet, a heat-recovery core, two fans, some ductwork, and a control. But not all HRVs are created equal. The majority of the balanced ventilation systems on the market are heat recovery ventilators (HRVs).

It's easy for homeowners to become confused with all of the information, and misinformation, out there about residential mechanical ventilation. Here are five common myths, and facts that help dispel them. It's easy for homeowners to become confused with all of the information, and misinformation, out there about residential mechanical ventilation. are five common myths of ventilation in today’s tightly sealed homes, along with facts that help dispel them.

Excess moisture has tremendous potential for damaging the home. It cracks and peels paint, ruins gypsum wallboard, causes exterior paint failure, warps doors and rusts cabinets and fixtures. Without control, it can even cause deterioration of joists and framing above the bathroom. As it condenses on windows, walls, ceilings and cabinets, it attracts dirt and makes more frequent cleaning and decorating necessary.

Nearly all homes contain building materials, furnishings, decorating items, and cleaning products that outgas pollutants into the indoor air. Ventilation can dilute the concentration of those pollutants. But, even if totally inert, safe alternatives are used, there’s one pollution source that can’t be eliminated—people. Because of normal, everyday human metabolism, we all release various gases such as carbon dioxide, water vapor , ammonia, methane, etc. If allowed to build up indoors, these can make a house odorous and uncomfortable. Plus, we all need a supply of fresh air indoors to replace the oxygen that gets used up.

Since fresh air is a basic human need and right, and ventilation is a key means to enable indoor air quality - it's fair to ask, who can you trust to help ensure that home ventilation equipment works as it should? The Home Ventilating Institute (HVI) is a non-profit organization focused on making sure ventilation products meet high standards that help protect health. What does HVI's Certified Ratings Program provide you?

In a whole-building ventilation system, the stale indoor air must be exhausted directly to the outside. Dumping exhaust air into an attic or other internal space can have dire consequences when warm, humid air hits a surface cold enough that condensation forms, increasing the likelihood that mold growth and structural damage may occur.

Tips for selection, location, and use. One of the first steps in ventilation system design is to determine the capacity needed. The best guidelines currently suggest that a general ventilation system should be able to provide a continuous air-exchange rate of either 15 cubic feet per minute (cfm) per person or 1/3 of an air change per hour (ACH), whichever is greater.

Simple cooling for the entire home. Whole-house comfort ventilators can provide an effective way to improve comfort in the entire house without air conditioning. If the home has air conditioning, whole-house comfort ventilators may help reduce energy costs because the air conditioner doesn't have to operate as frequently.