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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 kitchen exhaust fan duct is attached to flex duct, which is prohibited by code.

Wrong – The kitchen exhaust fan duct is attached to flex duct, which is prohibited by code.
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Wrong – The position of this exhaust fan does not allow the duct to route directly outside in as straight a path as possible.

Wrong – The position of this exhaust fan does not allow the duct to route directly outside in as straight a path as possible.
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Wrong – This exhaust duct extends far beyond what is needed to reach the roof; a short, straight, smooth rigid metal duct is best for exhaust ducts and exhausting to the soffit vent would be preferable.

Wrong – This exhaust duct extends far beyond what is needed to reach the roof; a short, straight, smooth rigid metal duct is best for exhaust ducts and exhausting to the soffit vent would be preferable.
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Wrong – This kitchen exhaust fan is not located directly above the stove top so it will be ineffective at removing cooking pollutants and it terminates within 3 feet of an operable window, which is prohibited by code.

Wrong – This kitchen exhaust fan is not located directly above the stove top so it will be ineffective at removing cooking pollutants and it terminates within 3 feet of an operable window, which is prohibited by code.
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Wrong – This kitchen exhaust is a recirculating model; kitchens should use exhaust fans that duct out through the roof to remove moisture and odors from the home

Wrong – This kitchen exhaust is a recirculating model; kitchens should use exhaust fans that duct out through the roof to remove moisture and odors from the home
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Wrong – Whole house fan installed with holes in surrounding platform that need to be air sealed

Wrong – Whole house fan installed with holes in surrounding platform that need to be air sealed
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Wrong – Whole house fan installed without an insulated cover

Wrong – Whole house fan installed without an insulated cover