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Old 11-11-2009, 09:27 PM   #1085
chunlianghere
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Join Date: Nov 2005
Posts: 6,087
the alum foil is wrap around the insulation which is class O. so this kind of installation way is good? any different using class 0 and class 1?

i see my flat other units, it seem all just having black rubber insulation, so this is the normal way?

you know anything about using form instead?
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.
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