Ac/heat duckwork.

[Oldtimer48]

Hello.
I have an 84 Skyline that we just purchased.
I've discovered the jackass that installed the dryer vented it straight through the heating/ac duckwork. Now the heat goes under the home instead of towards the back half of the home .
Can I cut out the bad section which is only 8 to 10 inches and install I new piece and where can I buy a replacement.
Thanks.

[amphora]

Check if the existing duct is round, oval, or rectangular—this affects the replacement fit.
While you’re at it, consider installing a backdraft damper or insulation wrap, especially if the duct runs under the home.

[ErnestWright]

And don't forget to add backdraft damper and wrap insulation if the pipe is located where heat loss is easy.

[minakylie]

Before purchasing a replacement duct, determine if it is round, oval, or rectangular in shape.
If the duct is located beneath the house, you may want to place an insulating wrap or backdraft damper at the same time.

[kneeldiscove]

Go to an HVAC Supply Store. These are places that specialize in heating, ventilation, and air conditioning systems. They will have a wider range of sizes and materials. A quick search for “HVAC supply store near me” will give you some options.

[Jayden Castillo]

Yep, you can cut out the damaged section and splice in a new piece of duct — just make sure to seal all joints well with foil tape (not duct tape) and, if needed, a metal collar. Replacement duct sections are easy to find at places like Home Depot, Lowe’s, or even most HVAC supply stores. If it’s flexible duct, you can grab an 8–10" piece and clamps; if it’s rigid, look for a short length of the same diameter.

[Ambre Garcia]

Hello.
I have an 84 Skyline that we just purchased.
I've discovered the jackass that installed the dryer vented it straight through the heating/ac duckwork. Now the heat goes under the home instead of towards the back half of the home .
Can I cut out the bad section which is only 8 to 10 inches and install I new piece and where can I buy a replacement.
Thanks
Ball Orbit

Yes, you can cut out the damaged section and splice in a new piece of duct. Just make sure to use proper galvanized sheet metal duct (same diameter as the existing run) and secure it with sheet metal screws and foil HVAC tape — not standard cloth duct tape, since that won’t hold up.

Most home improvement stores like Lowe’s, Home Depot, or even local HVAC suppliers carry short sections of round duct, couplers, and elbows you can use. If your run is flex duct instead of rigid, you can also get replacement flex duct and connect it with a sleeve and clamps.

While you’re at it, seal up the dryer vent properly — it should always vent directly outside, never into HVAC ducts.