Run time vs right-sizing

Vance · 2006-12-07T07:39:57+00:00

At -10C, which is also my design temp, my condensing gas furnace runs for 20 mins every 2 hours to maintain a setpoint of 18C with a spread of .5C, obviously it is theoretically oversized, however, if sized 'correctly' it would run continuously at -10C and use significantly more KWH's. Which would be the better scenario, almost continuous run times to improve comfort at the expense of higher electricity usage or the shorter cycles with less wear on the blower and draft inducer fan?