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Refrigerant Lines Insulation

steveray said:
And good luck getting any of the foam stuff to meet a plenum rating.....
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Would you allow the refrigerant lines to be in a plenum?
 
steveray said:
What are they made of? Or what would be the grounds for not having to allow it? I do not believe there is anything in 602....
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All of the ones that I've seen were made of copper. I suppose if there was never a leak, there would never be a problem. How about iron gas pipe? How about if either of them leaked? For sure, natural gas would be a problem...refrigerant...who knows.
 
Gas (LP,NG, and sewer) are all problems when and wherever they leak.....Bad idea for a plenum, which may exascerbate the issue, but allowable....
 
The IRC is silent about what materials are allowed within a plenum

Go to the IMC Section 602.2.1 Exception 3

3. This section shall not apply to materials exposed within plenums in one- and two-family dwellings.

However the Energy Code defines a residential building as follows

RESIDENTIAL BUILDING. For this code, includes detached one- and two-family dwellings and multiple single-family dwellings (townhouses) as well as Group R-2, R-3 and R-4 buildings three stories or less in height above grade plane.
 
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