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Wrong - HVAC metal cabinet seam is not sealed with mastic or metal tape.

Wrong - HVAC metal cabinet seam is not sealed with mastic or metal tape.
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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 - 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 - 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 - 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 - 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 furnace intake and exhaust are too close to each other and are missing rodent screening.

Wrong - The furnace intake and exhaust are too close to each other and are missing rodent screening.
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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 opening in the foundation wall around this pipe has not been sealed allowing entry for rodents and bugs

Wrong - The opening in the foundation wall around this pipe has not been sealed allowing entry for rodents and bugs
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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 flex duct is so twisted air flow is greatly restricted

Wrong - This flex duct is so twisted air flow is greatly restricted
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Wrong - This plumbing penetration through the foundation wall has not been sealed; the seam between the sill plate and the foundation wall is also unsealed

Wrong - This plumbing penetration through the foundation wall has not been sealed; the seam between the sill plate and the foundation wall is also unsealed
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Wrong - This tape product is not code approved for duct sealing.

Wrong - This tape product is not code approved for duct sealing.
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Wrong - Two exhaust terminations are joined in a roughly cut, restrictive hole that is not air sealed.

Wrong - Two exhaust terminations are joined in a roughly cut, restrictive hole that is not air sealed.
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Wrong - Unsealed holes for pipes can leave gaps large enough for insects, rodents, and even birds to enter the home.

Wrong - Unsealed holes for pipes can leave gaps large enough for insects, rodents, and even birds to enter the home.