tighten ,seal up an existing HVAC system
What are the best way and product to tighten / seal up an existing HVAC system
Around the penetrations at the air handler / return / registers
The ducting is the corrugated flexible ducting
What are the best way and product to tighten / seal up an existing HVAC system
Around the penetrations at the air handler / return / registers
The ducting is the corrugated flexible ducting
There are a number of ways to achieve a level foundation and mudsill.
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Replies
Elbow grease. And foil tape. And duct mastic. Possibly some caulk. And whatever else seems like it'll do the job.
Of course, if the ductwork is "inside the envelope" sealing isn't as critical.
All the HVAC system is in the hot attic
The local HD has some duct sealing goop but the directions says to wait 48hrs to let the goop dry before using the HVAC system, not have AC for 2 days is not an option
So lots of foil tape looks like it will have to work, I was hoping for mastic that I could use while the HVAC was running
If you buy foil tape, then get the more expensive UL rated stuff. It will stick reasonably well to even dirty surfaces. The new "cold weather" foil tape is even stickier.
Although not rated for HVAC, you can try the butyl rubber backed window flashing tapes. Hardcast makes a butyl tape just for HVAC. Word of warning- do not apply butyl tape to anything you want to remove later.
There are duct sealers you can apply to a live system- especially low pressure residential. Solvent based United from McGill will work, but if the vapors don't knock you out, the cost will.
And, sealing ducts within the building envelope does matter.
Well, since you can't shut the system down, I would recommend a farily fast setting silicon caulking compound. Put it on and work it into all the cracks a little with a gloved finger. That worked very well with my dust collection system.George Patterson