[chaosagent]

Rheem has a pretty good rep for residential equipment. At 25 years I would caution you to have the heat exchanger inspected by someone you trust (perhaps yourself if you can) to make sure there are not metal fatigue cracks developing. Carbon monoxide can be introduced into the air stream, bad juju.

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Of course that only applies if it’s a gas-fired heating unit.

[MileHi]

Of course that only applies if it’s a gas-fired heating unit.

Good point, my comment assumes facts not in evidence.