Including the attic within the conditioned space reduces heat loss from ducts, protects pipes from freezing, reclaims some storage and makes re-wiring much easier. Perhaps William Rose and his colleagues will soon dispel more attic myths. Place at least 50 percent of the vent area into soffits. Select vents with low air flow resistance. Install a ridge vent with low air flow resistance and good aerodynamics.
Higher numbers mean less resistance and better air flow.
A standardized test has been developed, but not yet adopted by manufacturers. Install air chutes to protect soffit vents from blockage by insulation. They channel air flow along the underside of the roof sheathing and don't seem to reduce air flow significantly. Inc. All Oikos pages copyright 1996 - 2001, Iris Communications, Inc .