What temp and pressure do you guys run your boiler systems at? I know there are different types of systems, just trying to learn a little more.
Interesting!
I spoke to the guy who designed and installed the system for my father back in 1981. He said it was designed to be run at 170-180 but he runs the similar system in his own house at 200.
Our gauge runs at 20-30 lbs pressure.
Right. This system was designed in 1981 when boilers were inefficient because propane was cheap. And with the wood boiler linked in, efficiency matters even less.System design plays a very big part. If the whole thing was designed for 180 water, that's what they would use to size emitters (baseboards etc) with. So if that dropped to say 160, it might not keep your house warm. Which in most or a lot of cases, could be rectified by simply putting more rads in later.
I think they used higher design temps in the olden days, I wouldn't likely use higher than 160 today. (I'm not a designer though). The amount of heat that goes up your chimney just from the boiler sitting there at 180° 24/7 is big wasted heat. Plus, a cooler boiler would have a bigger dT at the heat exchange surfaces so it can pull more heat out of the exhaust stream when the boiler is running.
No pressure.
Damper opens at *175
Damper closes at *185
So you're heating the water then cooling with cold water to lower the temperature if there is less demand?The cool part is that I have a motorized mixing valve, that constantly mixes water temp, for my heating zones, depending on the outdoor temps.
So you're heating the water then cooling with cold water to lower the temperature if there is less demand?
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