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Old 19-06-2012, 07:43 PM   #2895
Join Date: Dec 2011
Posts: 624

I have a very old MHI FCU MHI SKM458ERF (rated 4KW on body panel) in the living room. I can't tell what is the pipe size.

As part of a overall replacement (MHI System 5 to a system 4), I have to replace above FCU to a higher capacity model (to support living and dining).

Thinking of replacing with a 6kw Starmex FCU that requires 15.88mm pipe. The next rung down requires 12.7mm. How to I ensure my current pipe size supports these models?

Much thanks in advance!
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