A representative for the distributor inspected the installation and venting. He said everything was ok. Suggested that it happened because of the air in our basement. The boiler is in its own room, sealed off from everything. They replaced the boiler in November 2016. In March 2017 the same thing happened, the boiler is rusted out again. This new boiler lasted for 5 months. Does anyone have any idea why this is happening ? Now they are saying it must be our outdoor air
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