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Bosch Tankless - Piped Correctly?

I bought a house and this system had already been installed. There is no record of a sign-off at the local building department for the Bosch Direct Vent Boiler ZWB 42-3 A Greenstar Combi 151 used for baseboard hot water heat and domestic hot water.

It seems to work ok.

I think I need someone to inspect and correct if necessary, probably a Bosch certified installer.

Hempstead NY
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