4.1006.3 Whole-House Fan | Standard Work Specifications for Home Energy Upgrades

4.1006.3 Whole-House Fan

Topic:

Attics

Subtopic:

Attic Openings

For supporting material, see Building America Solution Center.

Desired Outcome:

Consistent, uniform thermal boundary Thermal boundary The separation between the interior and exterior environments of a building that slows heat flow between the conditioned space and unconditioned space to prescribed R-value of an adjoining insulated assemb

Single-Family Homes

Title	Specification(s)	Objective(s)
4.1006.3a Installation	Sides of fan insulation box assembly will be insulated to the same R-value as adjoining insulated assembly	Insulate to prescribed R-value
4.1006.3b Air sealing	Fan insulation box frame will be continuously weatherstripped to ensure a tight fit Fan insulation box will be constructed at a depth to protect the fan housing and motor from insulation	Prevent air leakage
4.1006.3c Attachment	Non-compressible insulation will be permanently attached in contact with fan insulation box Appropriate adhesive or mechanical fastener will be used	Ensure continuous alignment with air barrier Air barrier The separation between the interior and exterior environments of a building that slows air flow to the point that no smoke movement is visible at 50 pascals of pressure difference across the boundary
4.1006.3d Durability	Material integrity will meet a minimum expected service life of 20 years	Ensure a minimum expected service life
4.1006.3e Occupant education	Purpose of insulation will be communicated to occupant	Educate occupant on how to use the whole-house fan to ensure integrity of the fan insulated assembly throughout service life