I have 3 zones with zone valves (1st, 2nd floor, and basement) I usually don't heat basement zone for cost savings because I am never there and temps there are usually in upper 50s. Its heated by a small hydronic kick space heater with a blower. My question is, does it make sense to just open this zone valve manually and have hot water flow there when other 2 zones are on? My thought behind this is that I don't need heat there all the time, and it would be a waste to fire up the boiler to keep basement in 70s, but wouldn't it be basically "free" heat of some sort if valve is manually open and only sends hot water to kickspace heater with calls for other 2 zones?
Maybe its a stupid question, I am obviously not a plumber....
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