The ducts are too small I am told for 60,000btu furnace. (Even though the old one was 60kbtu)
Now we are testing a 40k btu unit and find it on the cold side at times. So all we do is keep turning up the thermostat.. Is that all we can do?
Thanks
As long as the 40,000 BTU furnace can satisfy the thermostat on the coldest days there shouldn't be a problem. If both furnaces can maintain at least 22C the furnace sizing really doesn't matter. You may not want to setback the temperature as much, using the programming, if the 40,000 BTU takes a long time to recover.
Did you switch from electric or oil to natural gas?
Is it the air temperature leaving the vents not as hot as the previous furnace? You can reduce the fan speed to increase the temperature leaving the vents, but would have to check the temperature rise afterwards.
Quote from: Chester17 on February 15, 2019, 05:42:38 PM
The ducts are too small I am told for 60,000btu furnace. (Even though the old one was 60kbtu)
Now we are testing a 40k btu unit and find it on the cold side at times. So all we do is keep turning up the thermostat.. Is that all we can do?
Thanks
Turning up the thermostat does nothing. If it can't meet 72 degrees, turning it to 74 won't make it blow hotter air.
60k isn't an option if the space is too small for one or the duct is too small.
Insulate the structure more to hold the heat.