How to insulate around elbows - duct insulation - for HVAC Install Techs

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[@SNS1212]

Exactly what I was looking for, thank you for this!

[@cleanairheatingcooling4105]

Thank you for posting. It's good to know you and others see value in this content. Please post if you have an interest in other topics.

[@danielmohr8796]

Ty!

[@babounce100]

Very helpful Thank you

[@marcocando2501]

For attics and crawl spaces, you should use 3" insulation, not bublerup it doesn't do much for R value. It works great only on condition space .

[@cleanairheatingcooling4105]

I agree that thicker insulation would be better. Are you referring to fiberglass insulation? Would that be R11 or R13?

[@erikcable1755]

bubble wrap is r4 so do 2 wraps@@cleanairheatingcooling4105

[@bx-bm1co]

Thank you. These videos are great for this time. Our gas prices are through the roof. To you have any pointers for flexible ducts in the attic.

[@knollie81]

They sell flex ducts that are already insulated. Probably easiest to replace the duct section in question with one of these.

[@cleanairheatingcooling4105]

Ideally the flexible ducts should be at least R8 insulation and in good condition. The internal plastic lining and the external plastic lining should be air tight and not damaged from UV light. Joints should be sealed with mastic and air tight. If you like additional help please reach out in comments and we are more than happy to assist you.

[@josephj2026]

So I have a duct elbow that condensates, but it’s located behind my living room wall. I cut the wall out and had an insulation company spray foam insulation in the ceiling bays to stop any humid air from reaching this duct, but it is still dripping water from the elbow joint. Would doing something like this to that leaky elbow joint help that issue you think?

[@cleanairheatingcooling4105]

Yes. You have to insulate the duct specifically. Blocking the air and humidity infiltration is important but it doesn't take the place of insulating the duct itself.

[@josephj2026]

Thank you for your reply!!

[@Cameron-km2cf]

Where the FSK tape? But everything else looks great!

[@DonTruman]

Good video (except for the sound cutting out at the end) thank you.

[@cleanairheatingcooling4105]

I apologize about that.

[@SethBondArtist]

It looks like you are using a different insulation for your spacers. Only foil on one side. Is that required?

[@cleanairheatingcooling4105]

I think it's the same installation but I'm not sure. It comes in small rolls in the same package with the big roll of I sulation.

[@Sean-Aviation]

in case of finishing a basement (drywalls on ceiling) is there any advantage insulating the ductwork?

[@cleanairheatingcooling4105]

Yes, to avoid condensation. Even if the heat would leak in conditioned space and have no effect on efficiency, in the AC mode the duct may sweat and drop condensation on the drywall.

[@Sean-Aviation]

@@cleanairheatingcooling4105 thanks

[@user-kp9lz8jd9b]

Will this work on square metal duct work? The duct work is from when we had an oil furnace.

[@cleanairheatingcooling4105]

Yes. It works ok square metal ductwork. 😀👍

[@JuiicyDrew]

Any supply duct should be insulated. Keeps the sweat from drippin. Return ducts necessarily do not bc it doesn’t have any purplish but to cycle air back into unit. Don’t go wrapping all duct you see.

[@mariorenteria9756]

Would you mastic the tape after that too?

[@cleanairheatingcooling4105]

Not necessary if you already mastic-ed the ducts perfectly. I guess there may be some r value if you mastic the tape but an immeasurable amount and not worth the time and effort.

[@howardmeeks3143]

Foil faced bubble wrap r-values are highly exaggerated and shouldn’t be used on ducts. You may have R-2 or less on those.

[@cleanairheatingcooling4105]

How do you measure this?

[@carlosroque3149]

What is the name of the material you are using?

[@cleanairheatingcooling4105]

I'm so sorry, I don't have that available. It's a pretty non descript commercial product we get from our supplier.

[@urbanman1516]

What tape is that you are using?

[@knollie81]

Appears to be foil tape

[@cleanairheatingcooling4105]

It is a UL listed foil tape. There is a chance box stores might have it. We can send you some if you need it!

[@Cameron-km2cf]

Flex tape right?

[@miguelestrada9882]

No the raigt Way

[@Kevinm0626]

This isn’t an approved duct insulation wrap.

[@cleanairheatingcooling4105]

It varies by jurisdiction and application. What area are you in?

[@Kevinm0626]

@@cleanairheatingcooling4105 Little Rock Arkansas.

[@Kevinm0626]

@@cleanairheatingcooling4105 I’m not sure, I was just watching other videos and he said it’s not sufficient enough for A/C in the attic?

[@cleanairheatingcooling4105]

@@Kevinm0626 that's likely true. I think temperature and humidity around the duct have a lot to do with what's adequate. Then you have minimum building codes to meet.