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told 25 year old boilers better than new--really?
we use hot water baseboard radiators to heat the house. Main heat is wood boiler. Back up is 25 year old gas boiler. Had a pump go out and the repair guy turned out to be the one that installed the gas boiler. We asked him about installing a new gas boiler, say a 98% efficient one, as the current gas one can't keep up when it gets below 0 (we live in Wisconsin) and it definately is not the most efficient. Also the aquastat on the gas boiler only goes down to 190, the wood boiler pressure valve goes off at 190, so if we have the gas boiler turned on it runs constantly (not as true backup) as the water from the wood boiler looses some heat in 100 feet journey to house.
Repair guy said that we should keep the current gas boiler as if it gets some cold water on it it wont crack while the new ones will. To me cold water would only hit the boiler if a pipe bursts, so his logic seems odd.
Anyone here know if what he says's makes sense or have a good reason not to replace a 25 year old boiler?