repair holes hvac ducts 27262
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Repair Holes Hvac DuctsTRANSCRIPT
Home Guides » Government Housing Assistance » Other Government Housing Assistance » How to Repair Holes in HVAC Ducts
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Wrap a hole in duct work with metal tape.
Heating, ventilation and air air conditioning (HVAC) ducts are generally
made of lightweight sheet metal, whether they are the solid or flexible type.
A hole in the duct work will cause leakage in the system and lower the
efficiency of the unit. The most permanent solution for an HVAC sheet
metal hole is to replace the entire section of the duct work. That isn't always
possible, however, at any given moment. Wrapping a hole with duct tape is
also not practical, as the adhesive on the tape may begin to deteriorate and
cause the duct tape to unravel almost immediately. But there is a type of
wrap made especially for holes.
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Sure Seal Spiral Self Sealing Ductwork and Fittings
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Wash the duct area where the hole is using a soapy dishwater solution
in a bucket and a rag. You must wash the entire circumference of the
duct to be repaired and rinse it thoroughly when finished. Allow the duct to
completely dry.
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Pull about 6 inches of Underwriters Laboratory 181 Approved
aluminum sealing tape off of the spool. This can be found at home and
garden stores, HVAC shops and hardware stores. Then pull the wax paper
backing from the tape.
Begin taping a few inches above the hole. As you use the original 6
inches, pull,out another 6 inches of tape, remove the waxpaper
backing and continue wrapping around the duct. Slightly overlap each edge
of the tape with each pass.
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How to Repair Holes in HVAC Ductsby Dale Yalanovsky, Demand Media
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Make at least three passes over the hole as you wrap the duct. This
will overlap each edge one time. Press the tape down firmly with a
putty knife, after each pass, to ensure a solid, airtight seal.
Cut the tape when the hole is wrapped using a pair of scissors. Dispose
of the waxpaper backing when finished.
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Things You Will Need
Aluminum tape, Underwriters Laboratories 181 Approved
Putty knife
Mastic
Soapy dishwater solution
Bucket
Rag
Clean water
Scissors
Sheet metal patch
Selftapping sheet metal screws
Drill with appropriate driver bit
Sheet metal shears
Tip
There are several widths of tape to choose from. Twoinch, 3inch and 4
inch widths are common. Choose the width that easily covers the hole with
one pass.
A thin sheet metal patch can also be cut to fit the hole with sheet metal
shears. The patch is screwed into place with selftapping sheet metal screws,
and then mastic is applied along the edges to ensure an airtight seal.
For smaller holes, apply mastic like caulk. Push some mastic directly into
the hole for a quick and easy seal.
Warning
Sheet metal edges are sharp. When handling sheet metal, always wear
leather palm gloves.
References
Hipps Help: How To Repair HVAC Ducts
Center for ReSource Conservation: The SkinnyDuct Sealing
Resources
Eternabond: Ductwork Repairs
About the Author
Dale Yalanovsky has been writing professionally since 1978.
He has been published in "Woman's Day," "New Home
Journal" and on many doityourself websites. He specializes in
doityourself projects, household and auto maintenance and
property management. Yalanovsky also writes a bimonthly column that
provides home improvement advice.
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