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HHI-Pedia Entries

Backdraft Damper	A device that allows air to only flow in one direction through a duct.
Backdrafting	Complete reversal of flow from a combustion appliance of its combustion by-products, usually due to negative pressures indoors.
Balanced Ventilation	A general ventilation strategy that results in the house experiencing a neutral pressure.
Basement Foundations	Unfinished and uninsulated basements have a high potential for mold growth and other contamination problems, but can be healthy with proper planning.
Bathroom Fan	Exhaust fans aren’t just for keeping the bathroom from smelling bad.
Batt	A widely used form of insulation.
Biocides	Evaluate whether a biocide-free product is what you want to use.
Biodegradable	Biodegradable is defined as “the ability of natural biological decay processes to break down complex compounds into simple molecules.”
Biofilm	Germs cooperate to build and maintain a barrier that keeps even strong disinfectants such as bleach and iodine at bay.
Biological Pollutants	Air pollutants, such as mold and pollen, that either are or once were alive, or by-products of metabolism.
Bisphenol A	Bisphenol A (BPA) is a chemical produced in large quantities for use primarily in the production of polycarbonate plastics and epoxy resins.
Blower Door	A device used to pressurize or depressurize a house to evaluate its tightness.
Blower Door Test	Blower door tests help determine a home's airtightness.
Borax	A natural salt, also known as sodium borate, that has become popular as a nontoxic ingredient in homemade green cleaners.
Bottled Water	It’s convenient and healthful, but is it “green?”
Breathing Zone	The breathing zone in a room usually extends from a few inches off the floor to about 6 feet off the floor.
British Thermal Unit (BTU)	The amount of heat required to raise the temperature of 1 pound of water 1°F.
Building Envelope	The exterior portion of a structure, usually insulated, that surrounds the conditioned space.
By-Products of Metabolism	Solids, liquids, and gases given off by living creatures as a normal part of the life process.

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