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Wrong - Code requires a kitchen exhaust fan duct to be a smooth metal duct (galvanized steel, stainless steel, or copper) and to terminate outside, not in an attic or crawlspace.

Wrong - Code requires a kitchen exhaust fan duct to be a smooth metal duct (galvanized steel, stainless steel, or copper) and to terminate outside, not in an attic or crawlspace.
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Wrong - Condensing furnace intake and exhaust are too close together.

Wrong - Condensing furnace intake and exhaust are too close together.
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Wrong - Exhaust fans should not have tight bends in duct work, especially right next to the fan as this can block airflow

Wrong - Exhaust fans should not have tight bends in duct work, especially right next to the fan as this can block airflow
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Wrong - Flex duct is prohibited for kitchen exhaust fans by the IRC.

Wrong - Flex duct is prohibited for kitchen exhaust fans by the IRC.
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Wrong - Flex ducts are prohibited by the IRC for kitchen exhaust and, at 28 feet, this duct is too long to be effective.

Wrong - Flex ducts are prohibited by the IRC for kitchen exhaust and, at 28 feet, this duct is too long to be effective.
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Wrong - Flue pipe was poorly flashed at roof.

Wrong - Flue pipe was poorly flashed at roof.
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Wrong - If this kitchen exhaust duct had been extended a few inches, at least one bend could have been eliminated.

Wrong - If this kitchen exhaust duct had been extended a few inches, at least one bend could have been eliminated.
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Wrong - Kitchen exhaust ducts are prohibited from terminating within 3 feet of an operable window or near gable vents.

Wrong - Kitchen exhaust ducts are prohibited from terminating within 3 feet of an operable window or near gable vents.
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Wrong - Kitchen exhaust fans must be located directly over the stove top to be effective at capturing and removing cooking pollutants.

Wrong - Kitchen exhaust fans must be located directly over the stove top to be effective at capturing and removing cooking pollutants.
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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 furnace intake and exhaust are too close to each other and should be facing different directions.

Wrong - The furnace intake and exhaust are too close to each other and should be facing different directions.
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Wrong - The IRC prohibits the use of flex duct for kitchen exhaust and only permits PVC duct for downdraft systems that meet specific exceptions; also, gaps at the ceiling have not been air sealed.

Wrong - The IRC prohibits the use of flex duct for kitchen exhaust and only permits PVC duct for downdraft systems that meet specific exceptions; also, gaps at the ceiling have not been air sealed.
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Wrong - The IRC requires that kitchen exhaust ducts terminate outside, at least 3 feet from operable windows.

Wrong - The IRC requires that kitchen exhaust ducts terminate outside, at least 3 feet from operable windows.
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Wrong - This kitchen exhaust duct uses flex duct, which is prohibited by code, and the duct’s 22-foot length and multiple bends will slow the movement of pollutants out of the home.

Wrong - This kitchen exhaust duct uses flex duct, which is prohibited by code, and the duct’s 22-foot length and multiple bends will slow the movement of pollutants out of the home.
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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 – A clothes dryer that vents to the crawlspace can contribute moisture to the crawlspace; this can result in damp, molding, and rotting insulation

Wrong – A clothes dryer that vents to the crawlspace can contribute moisture to the crawlspace; this can result in damp, molding, and rotting insulation
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Wrong – Exhaust fan ducts must be smooth metal ducts; flex duct is not permitted by the IRC.

Wrong – Exhaust fan ducts must be smooth metal ducts; flex duct is not permitted by the IRC.
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Wrong – Overly powerful kitchen exhaust fans can backdraft other combustion appliances in the home

Wrong – Overly powerful kitchen exhaust fans can backdraft other combustion appliances in the home
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Wrong – Refrigerator was not properly secured to the wall studs of the home.

Wrong – Refrigerator was not properly secured to the wall studs of the home.
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Wrong – Seams in the furnace-to-AC connection at the air handler are not sealed.

Wrong – Seams in the furnace-to-AC connection at the air handler are not sealed.
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Wrong – The duct for this kitchen exhaust fan is made of flex duct instead of smooth metal duct and the duct is not properly supported.

Wrong – The duct for this kitchen exhaust fan is made of flex duct instead of smooth metal duct and the duct is not properly supported.
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Wrong – the exhaust terminal for a clothes dryer should not be covered with a screen which could trap lint; instead, cover it with a hooded, louvered damper

Wrong – the exhaust terminal for a clothes dryer should not be covered with a screen which could trap lint; instead, cover it with a hooded, louvered damper