3 speed pump will make it easier to adjust the flow if your calculations are wrong. once you find the setting that works good, you'll leave it there. you can get a 3 speed pump for about $10 more than a single speed. I use the Taco 00R pump in my system:thumbup:
www.pexsupply.com for most of the parts. The box on the wall is a Taco 1 zone relay. The thermostat calls for heat, zone relay closes, and the circulator pump kicks in which causes the Takagi to fire up.
Gas line seems to be flowing enough volume. It is a 7/8" ID natural gas line but it is about 190' from the meter. I raised the slab temp from 22*f to 55*f in 22 hours:beer:
I have about 25% of the ceiling metal installed. We're going to put more up this afternoon/evening and during the week. I'm hoping to be done and blowing the insulation Thursday. For now, it's really nice to have a floor that is above freezing!!!!!:bounce::beer:
I don't have the slab sensor mounted in the slab yet, just sitting on top and air temps were lowering the reading. I an 8"x8" piece of 2" Foamular 250 over the sensor to block air from reaching it for now. The slab temp is 51*:bounce:, without the insulation I was getting a 36* reading.
I fired my floor heat up last night at 6PM, slab temp was 22*F. I don't have the ceiling metal/insulation installed yet. The walls are done, but ceiling won't be done until next weekend probably. I just went out and checked it again at 8am it was at 32*F. I expect it to be around 40*F at 6PM...