I have installed a Navien NCB-180E in my pole barn apartment. I have the living area on one zone (20x40) and the garage on another (44x40). 1/2" PEX is run on 10" centers through 4" concrete. Slab is on top of 2" foam board. The walls are spray foamed with 3" of closed cell foam and blown in fiberglass on the ceilings.
I did not put a temperature probe line in the concrete so I am relying on ambient air temp to run the system. I am seeing big temp swings. I have the thermostat set at 64 and I will see max temps up to 68 and min temps down to 60. Very uncomfortable swings. Water temp is set to heat to 111 degrees and by the end of the heating cycle, I am seeing return water from the floor at about 83 degrees.
Any suggestions to get the temp to flatten out?
Thanks, Doug
I did not put a temperature probe line in the concrete so I am relying on ambient air temp to run the system. I am seeing big temp swings. I have the thermostat set at 64 and I will see max temps up to 68 and min temps down to 60. Very uncomfortable swings. Water temp is set to heat to 111 degrees and by the end of the heating cycle, I am seeing return water from the floor at about 83 degrees.
Any suggestions to get the temp to flatten out?
Thanks, Doug