My attic is Open Cell Spray Foam – is it OK to air condition the space?
My attic is Open Cell Spray Foam – I have a 2600 sq ft dehumidifier running. The guy that did the spray foam says I need to run an a/c vent to the attic. One A/C company added a small 4″ auto close duct. They said that would be OK to add without causing to much positive pressure to the attic. Spray foam guy said that was not enough.
He said to disconnect one of the overflow ducts, cap off the connection. Then remove the barometric manual dampener and add an electronic dampener on that piece of the overflow duct (just because the electronic is more reliable) and dump that a/c into the attic.
One A/C company I was going to have to the work said they wouldn’t do it because it could cause too many other problems with positive pressure in the attic and the pressure pushing air back into the house could cause the a/c unit to short run. They also said that open cell spray foam attics were not meant to be air conditioned like you air condition the house.
I really need some feedback because my attic is still running hot, after the open cell spray foam. Hot days in the 92 degree range the attic will run about 97 degrees. The guy that did the spray foam said that I need to run some a/c into the attic to help fix that issue.
Thanks for your help and comments.
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