The Proper Way to Close-off Air Conditioning and Heating Vents

To close off a room or an entire section of your home to air-conditioning and/or heating this is the correct way to do it.

[anthonyb]

You should try foam board insulation. It’s cheaper then 1/2” ply, easy to cut and has 3-4 times the r value.

[LifeisGoodtyGod]

When asked about closing up a vent the HVAC guy removed the vent cover, took rolled up duct insulation and stuffed it as far up the duct as possible so it blocked the air flow at the start of the splitting duct and not at the register itself. This way the air wasn't getting trapped at the vent but instead continued down the stack duct.

[dalemillar]

I want some of what he’s smokin’. But seriously, you can accomplish the same results using good heavy quality clear Gorilla packing tape. Take the vent out, takes about 3 strips of tape from the back side. I also put one sided sticky foam tape around the inside edges as well. Screw the vent back in place. Been good for 5 plus years. Good luck!

[KimberlyOurlian]

glad i watched this. my heat lover roommate and me dont get along when it comes to sharing the ac and heat. i also have 4 fur buds with lots of fur and they get hot easily. just got my own portable ac and his turning the heat on overpowers my ac. i think this should solve that problem, thankyou!

[andrewlawson]

I just stuff a towel when I need to seal one off works great been doing it for years 👍🏼

[brianmclaffin]

Great video. Thank you for putting this up.

[Praxia]

Just cut out a plastic backing, like a garbage bag or something, cut around the edges and stick it back in. Perfect and invisible seal with way less work and trouble.

[JoeBarack-mf]

Don't use tape.... proceeds to use masking tape after 20 minute 🤦🏻

[cindynewell]

Thank you for this! My daughter has sounds that she can't tolerate and one is air whistling through her heater vent. We live in Colorado and need the heat. This will make the whole family happy!

[w.r.carman]

How can you dislodge a stuck apparatus that opens and closes the vents? A few of mine are stuck. Could I put a bit of W-D 40 on the lever? Me pushing as hard as I can with a metal object isn't working. lol

[TT-tqjs]

Just wantedto say thanks. Trying to block off smoke from neeighboring apt. Some people hate rules. I did try tape & cardboard 😂 But in my defense a 65 yr old female. Anxxios to see how might work with smoke or think vape is what the kids use. Thanks again.

[clubghz]

Is it ok if I shut one of 3 bedrooms on the top level of Tri-split level 1500 sqft house ? It's hot like hell in here ?

[michaelharris]

I wanted to make a separate comment to update you on the situation. The whole time, there were two vents across my room that were open, and after closing them shut, all the good old cool air is finally coming to my room, and it also turns out that one of the furnaces was outputting too much, thus describing why my room got so hot every time my parents turned on the heat during the winter. Even with the cool air made priority, I still had to use a makeshift open door/fan solution until now! I do know though that if I ever need to force-close any vent that won't close via normal methods that I also have the close off with a good thick block of wood the same size as the vents! I'm glad I found your video when I did, and I just want to thank you for putting this simple, effective solution out there!

[lormor]

There are 2 heater vents in my remodeled manufactured living room. After I saw your video on not covering or closing vents, I moved my sofa forward to allow that vent to be opened. I had a deflector on it but it wasn't really helping much. The main problem is my electric fireplace/tv stand sits directly atop the other one. I can't pull it forward or move it to either side, so I closed it and put a magnetic cover over it. I'm still very stressed about it. All the heater vents in our home are open and not blocked. Can you tell me if this was a good solution or if I should see about replacing this fireplace/tv stand? Any help would be much appreciated. Thank you

[angnbama]

Thanks! I have small closet that has a vent - no purpose- will do m this. Thanks for clear instructions- why what happens etc.

[Nana-towk]

Again if I tried to do that, it would blow it out of the wall. It has no screw holes. I think just remove those vents. Personally, I’m getting tired of central AC N HEAT. I wish they could just send new pipe through the old pipe. After a while, all the years of dust just kind of gross me out. Is there an easy way to replace some pipe? Previous owners or just old venting; the ducts just don’t ever seem clean.

[ladyanime]

And this will also help keep me from hearing movies/music/people from other rooms via vent?

[sab_]

I took my vent off and covered the inside with cloth which the vent itself held in place. Worked so well I worried about pressure on the HVAC.

[Nana-towk]

I tried closing mine it blue the vent out of the wall. Finally, I shoved a round piece of roller foam ( yes, like for sore back etc) with the same diameter down into the circular tubing. This is all going into a sun room. This summer I may pull up som floor and remove that vent altogether or even redirect it into the house.

[juliachu]

Really good! Thanks for your detailed explanation and performance!
I have Anthorize rheumatism， don’t want cold air, even closed but cold air still squeeze in, this Vedio gave the good idea!