Re: Nee photograph of

Posted by Owen_Dyneto On 2021/3/14 11:44:19

Not really John. I initially shared your thought but as I noted and later learned, the heat exchanger tubes in contact with the exhaust were corrosion-resistant, either monel or stainless. The outer wrap of the exchanger however was just mild steel and it's eventual failure was probably what brought owners back to the dealerships for replacement with hot water units.