Showing results 351 - 400 of 422
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Wrong - Flex duct insulation is overly compressed in 3 ways; Zip-tie fastener is over the insualtion not under the insulation at the duct boot collar, duct turning radius is too tight, and support strap is too tight.
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Wrong - Flex duct resting on floor compressing insulation and causing condensation
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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.
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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.
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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.
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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
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Wrong - Penetrations in walls for ducts should be air sealed to reduce air leakage.
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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.
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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.
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Wrong - The IRC requires that kitchen exhaust ducts terminate outside, at least 3 feet from operable windows.
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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.
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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 is a poorly sealed chase with no solid air barriers along the sides of the chase and no caulk around the electrical wires installed through the ceiling of the chase.
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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.
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Wrong -The duct does not have enough support so it is sagging and compressing the duct
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Wrong – A tear in the outer jacket of this duct shows where an in-line airflow measurement was made; the inner duct was not sealed and created a duct leak.
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Wrong – Don’t use nails to fasten poly vapor barrier around flex ducts; it will allow moist air to reach the ducts where it could condense and ruin the insulation.
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Wrong – Duct is pulling away from ceiling because it is not sealed to the ceiling
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Wrong – Exhaust fan ducts must be smooth metal ducts; flex duct is not permitted by the IRC.
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Wrong – Fiber board duct is not sealed at seams; flex duct is sealed with duct tape not mastic tape or UL-181 metal tape.
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Wrong – Insulation should not be pinched where flex ducts connect to the trunk duct as compression of the insulation here can lead to cold spots and condensation on the duct surface.
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Wrong – It is difficult to test the air flow in this fresh air intake duct due to poor access and inadequate length of straight duct to get an accurate in-line flow measurement.
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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.
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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
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Wrong – the interior seam of the branch duct to trunk duct juncture is sealed with mastic but there are gaps around the exterior seam that should also be sealed with mastic or metal tape.
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Wrong – The kitchen exhaust fan duct is attached to flex duct, which is prohibited by code.