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HHI-Pedia Entries

Fan Door	A device used to pressurize or depressurize a house to evaluate its tightness.
Filtration	The process of removing particles or pollutants from air or water.
Fire Alarm	Professionally monitored systems are most often found in commercial settings.
Flat-Plate Core	A metal, plastic, or treated-paper device that is used in some heat or energy recovery ventilators to transfer heat and sometimes humidity between two separate airstreams.
Flood	How to stay safe both during and after a disaster.
Forced Draft	A system utilizing a fan to blow air into the combustion chamber of a combustion appliance.
Formaldehyde	A common gas found in indoor air, often released from building materials, consisting of 1 carbon atom, 2 hydrogen atoms, and 1 oxygen atom.
Formaldehyde-Based Glues	Common glues that hold together manufactured wood products such as plywood, oriented strand board and medium density fiber board.
Foundation	Supports a house and transmits its load to the ground or soil. It can have a significant impact on the health and integrity of a home.
Fragrances	Synthetic fragrances and scents, added to a wide-range of consumer products, are among the most common household air pollutants.
Fresh Air	Outdoor air that is brought indoors.
Fresh-Air Duct	A duct through which air travels from the outdoors to the indoors to benefit the occupants, often integrated with a forced-air heating/cooling system.
Fried Dust	Popular term for airborne debris which burns when it comes into contact with very hot surfaces.
Fungus	Mold, mildew, yeast and mushrooms are common examples.

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Information provided by The Healthy House Institute is designed to support, not to replace the relationship between patient/physician or other qualified healthcare provider.