Showing results 1 - 20 of 20
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A blower door is installed in a doorway and is ready for testing
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A home is tested at two points for enclosure air leakage
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Calibrated blower door fans are used for envelope leakage testing
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Floor cavity air pressure is measured by placing a tube into the floor cavity through a small drilled hole
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Floor cavity pressure is measured by inserting a tube into the floor cavity using an extension pole
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Infrared imaging shows cold conditioned air pouring out of the open floor cavities under this attic kneewall into the hot unconditioned attic
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Infrared thermography during depressurization testing reveals air leakage at corner of spray foam-insulated room where wood-to-wood seams in framing were not air sealed
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Limited attic access can make inspections for missing air barriers and insulation challenging
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Limited attic access may make it necessary to use a bore scope when inspecting for missing air barriers and insulation in existing buildings.
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Pressure manometers are used to determine the level of pressurization and rate of leakage when conducting blower door testing and building diagnostics
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Right - Manometers are placed away from the indoor side of the fan during blower door testing
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Right – The blower door is installed snugly and securely to the door frame during testing
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Right – The blower door pressure reference hose is placed well away from the outdoor side of the fan
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Right-- IR photo shows how effectively spray foam insulated/air sealed attic kneewall and the floor cavities under kneewall
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Smoke generators are used to identify air leakage sites during depressurization testing
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The air tightness of the garage-to-house air barrier can be tested with a blower door kit and two manometers
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Wrong - This IR image of a second-floor landing shows that attic air is flowing far into the interstitial floor cavity of the second-floor landing
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Wrong - This IR image shows where hot attic air has penetrated into the floor cavity that lies behind the stairwell wall
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Wrong – The blower door is installed improperly with a gap at the corner and along the side of the frame that will allow air leakage and could allow the frame apparatus to become dislodged during testing
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Wrong – The blower door pressure reference hose (blue) ends too close to the outdoors side of the fan. Air moving across the end of the hose will affect the pressure reading