Posted by MarkB_MI on July 20, 2014 at 03:17:42 from (70.194.11.226):
In Reply to: Hot water heat posted by Case e on July 19, 2014 at 21:17:50:
"Fairly old" is a bit vague. Our boiler (propane/natural gas) is a little over twenty years old, and the previous boiler (oil) lasted twenty years. So I guess I'd be real suspicious if the boiler is much older than 20. If it's thirty years old, better assume it's on its last legs.
Changing out a boiler is not a huge job, although the boiler for a 3200 square foot house is going to be expensive. Generally speaking, pipes and baseboards last a long time; most of our baseboards are original; the only ones I've replaced were done as part of remodeling projects.
Like a furnace, you need to periodically clean the burners. Like a water heater, you need to periodically drain the boiler to remove sediment. Pumps do wear out although ours is going strong at twenty years. The only repairs I've had to do was replace the Honeywell motors on the zone valves. The motors didn't fail, but the switches inside them (which tell the controller when the valve is open) went bad.
I would think the life of a hydronic system depends a lot on water quality. If you have very hard water, things are going to plug up and wear out. We have a water softener, which I'm sure helps.
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