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Wrong - HVAC return air filter has not been replaced for over a year.

Wrong - HVAC return air filter has not been replaced for over a year.
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Wrong - HVAC rigid metal duct seam needs to be air sealed with mastic or metal tape.

Wrong - HVAC rigid metal duct seam needs to be air sealed with mastic or metal tape.
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Wrong - Metal tape is poorly adhered and metal duct and duct-to-subfloor seam is not sealed.

Wrong - Metal tape is poorly adhered and metal duct and duct-to-subfloor seam is not sealed.
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Wrong - No air barrier is present between the floor system and unconditioned space.

Wrong - No air barrier is present between the floor system and unconditioned space.
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Wrong - Not enough straps were used to hang this flex duct so it is sagging, restricting air flow

Wrong - Not enough straps were used to hang this flex duct so it is sagging, restricting air flow
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Wrong - OSB subfloor left exposed to the elements.

Wrong - OSB subfloor left exposed to the elements.
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Wrong - Penetrations in walls for ducts should be air sealed to reduce air leakage.

Wrong - Penetrations in walls for ducts should be air sealed to reduce air leakage.
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Wrong - Recessed can light is compressing duct work.

Wrong - Recessed can light is compressing duct work.
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Wrong - Rim joist cavity missing insulation

Wrong - Rim joist cavity missing insulation
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Wrong - Seam in duct boot is not sealed.

Wrong - Seam in duct boot is not sealed.
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Wrong - Seam in round metal duct is not sealed.

Wrong - Seam in round metal duct is not sealed.
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Wrong - Seams and holes in duct boot need to be sealed.

Wrong - Seams and holes in duct boot need to be sealed.
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Wrong - Seams at duct elbow are not fully sealed with mastic.

Wrong - Seams at duct elbow are not fully sealed with mastic.
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Wrong - Seams in metal ducting are not sealed.

Wrong - Seams in metal ducting are not sealed.
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Wrong - Sub-floor insulation has gaps, compression, and misalignment.

Wrong - Sub-floor insulation has gaps, compression, and misalignment.
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Wrong - Sub-floor insulation is not properly installed or supported.

Wrong - Sub-floor insulation is not properly installed or supported.
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Wrong - Sub-floor nails are missing the floor joist.

Wrong - Sub-floor nails are missing the floor joist.
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Wrong - Terminate exhaust fan ducts outdoors, not "near" the outdoors

Wrong - Terminate exhaust fan ducts outdoors, not "near" the outdoors
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Wrong - the CFM rating may not meet the performance specification once installed, and the sone rating is too high.

Wrong - the CFM rating may not meet the performance specification once installed, and the sone rating is too high.
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Wrong - The holes around the HRV ducting should be air sealed.

Wrong - The holes around the HRV ducting should be air sealed.
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Wrong - The seam around the duct boot where the duct boot enters the trunk duct has not been completely sealed with mesh tape and mastic.

Wrong - The seam around the duct boot where the duct boot enters the trunk duct has not been completely sealed with mesh tape and mastic.
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Wrong - The support strap for the duct is too tight and the radius of the turn is too sharp.

Wrong - The support strap for the duct is too tight and the radius of the turn is too sharp.
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Wrong - This batt insulation is not aligned with the subfloor and joists.

Wrong - This batt insulation is not aligned with the subfloor and joists.
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Wrong - This flex duct is so twisted air flow is greatly restricted

Wrong - This flex duct is so twisted air flow is greatly restricted