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Passive Solar? Poly Moisture Barrier?

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VaporThe gaseous form of a substance that is normally a liquid at room temperature.
Vapor BarrierIt’s an essential component of construction in a healthy home.
Vapor PressureA force that drives vapor molecules from an area of high concentration to an area of low concentration. In homes this typically refers to water vapor pressure.
Vapor RetarderA material that slows down the amount of diffusion through a solid material, often used in insulated walls.
Vapor Steam CleanersVapor steam cleaners are versatile machines that offer the benefit of chemical-free cleaning.
VentilationThe process of supplying air to, or removing air from, a house, most often with a fan.
Ventilation AirAir that enters a house specifically for the purpose of ventilating. See also combustion air.
Ventilation and air pressureThe bringing in of fresh air and the exhausting of stale air, and how air pressure differences are involved.
VirusesMicroorganisms that can cause a lot of mischief, viruses need hosts for propagation.
Volatile Organic Compound (VOC)A class of hundreds of different molecular compounds containing carbon that easily evaporates, often released from building materials and found as contaminants in indoor air.

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