Oh boy, might have to boost my high setting up to 180*
I've had mine set at 175 degrees for the entire heating season to date. Wonder if its worth bumping it to 180 degrees, or if perhaps I should go a tad higher than that? I only have enough feet of HW baseboards in all of the zones of the house and garage combined to deliver about 77,000 BTU's to the house at 180 degrees going out and 160 degrees returning. The only way I can increase this would be to go higher than 180 degrees. But the heat loss calculations I have ran come in at just about 77,000 BTU's when I use -20 degrees as the design temp (though I now know that the typical design temp criteria for this area is only zero degrees), so it might be OK for me to just leave it at 175. ??? In the end I guess that if the house can't hold 69 degrees I can always crank it up. My 22.7 KW resistance boiler used to struggle a bit to keep up in temps like this, and 22.7 KW is 77,450 BTU's.