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Plumber says `Normal Corrosion` - Lochinvar Radiant Heat KBN080
I'm going through the process of purchasing a house and the radiant heat came up as an area of concern. I can't imagine that Lochnivar Radiant heat units have normal corrosion like this (attached image). The home owner had a HVAC specialist inspect said it was completely normal:LOCHINVAR BOILER-
Boiler is in good working order the corrosion being reported by the home inspector is negligible. This corrosion is very common on Lochinvar boilers. The 4 tapping on the top of the stainless steel heat exchanger have had water seep from threads overtime. This happens due to the different expansion rates of the stainless steel taps versus the brass fittings. Several of the brass fittings have previously been replaced. None of these are active leaks and do no effect the performance or function of the boiler. There is rust in the bottom of the sheetmetal cabinet from a previously clogged drain that was corrected. The boiler currently operates properly and is not effected by any of the issues pointed out by the inspector.
I frankly find it hard to believe the the corrosion has no impact on performance but would welcome insight.