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Old 11-11-2009, 09:41 PM   #1086
Senior Member
Join Date: Jul 2004
Posts: 2,312
Class 0 n 1, the different is jus the fire rating. means class 0 wont be so easy burn up by fire.

any insulation is the same IMO. important is the thickness of the insulation used for the piping size n R22 or R410A.

thus i see not important of class 0 or 1 . hmm... for 1/2 in insulation, what is the copper size diameter?
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