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Discussion Starter #1 (Edited)
I live in S. Texas, where 100+-degree temps are common in summer. The air-handler is attic mounted - due to insufficient attic ventilation (which I'm also working on), attic temps get upwards of 135 on a 100-degree day.

As I said, I'm working on the ventilation issue, and I'm also slowly replacing the R4-insulated flex ducts with R8 ducting. Since the air handler is sitting in all this heat, I'd like to improve it's insulation as well. One method I've thought about is rigid-foam sheets strapped/glued around it (with access to the access panel) - any other ideas? And is this worth it (bearing in mind this would also help in winter)?

Thanks!
 

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Discussion Starter #3
Thanks, beenthere!

Looks like the R6 duct insulation could work pretty well - was that what you had in mind?
 

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Yep, it knock several thousand BTU off of your ducts heat gain and or loss.
 

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Discussion Starter #5
The ducting is almost entirely flex duct, with distribution triangles to split it off. I want to insulate the air handler, and it looks like I could use the duct insulation product (I assume it's meant for sheet metal/fiberboard ducts) around the air handler.
 

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You can use it on the air handler. As long as you leave access to the panels for future service.
 

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Discussion Starter #7
Absotively and posilutely! :laughing: I clean the indoor & outdoor units myself, so I'm definitely going to leave access.
 

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Don't know how you guys survive in 100-135 deg F attics. I only see 1 or 2 a year. -40F I can handle, just put extra clothes on but you can only strip down so far and that insulation is awful itchy on bare skin.:laughing:
 
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