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Can too much soffit and ridge ventilation actually hurt a house if the . . . In a poorly sealed house roof venting can increase the stack effect - meaning more air entering the house at the base, and exiting into the attic That's why the recommendation is to have more vents at the soffits than at the peak, which slightly pressurizes the attic, reducing exfiltration
Should I vent my unvented garage attic? - GreenBuildingAdvisor I’m building a new single-story single-family house with an unvented attic and am looking for input on how to address my attached unvented garage attic The home is located in Northern California in climate zone 3-C (Marine), so mild weather year-round
Attic Upgrades and Ventilation - GreenBuildingAdvisor BGG had an energy audit done, which informed his plan to remove the existing fiberglass batts, air-seal the attic, install a ducted heat pump system, then blow in cellulose insulation He asks if, while the attic is empty, it is a good time to perform other upgrades He is particularly interested in whether mechanical ventilation should be added
Ducts in an Unconditioned Attic - GreenBuildingAdvisor Running unprotected ductwork through an attic can court problems Particularly in hot-humid climates, moisture can collect on the outside of ducts in summer Encapsulating ducts in closed-cell foam or following code-prescribed methods for burying ducts in insulation can prevent the problem Illustration courtesy Home Innovation Research Labs
The Best Way to Keep Your Attic Cooler is to Change Your Roof Color A dark roof gets hot, and that heat conducts downward into the attic The best way to keep that heat out of the attic is to prevent it from being absorbed by the roof Image Credit: Cameron Taylor View Gallery 5 images
Is Venting an Unconditioned Attic Necessary? The condensation-related problems associated with unconditioned attics have less to do with ventilation than air-sealing and insulation
6 Ways to Improve Ducts in an Unconditioned Attic 6 Keep your attic cooler with a reflective roof or radiant barrier Another way to reduce heat flow into your ducts from a hot, unconditioned attic is to keep the attic cooler The best way to cool your attic is by stopping the heat before it has a chance to enter by using a reflective roof
House under extreme negative pressure NOT due to the hvac system . . . I have no attic fans or whole house fans The chimney is well sealed Our house is under a lot of negative pressure and as a result it’s very cold in the winter This air pressure is independent of the hvac system, as you can feel an influx of air through any little opening on the Lower floor at all times, even when the hvac is off