Fall Tune Up Part 14 – Reading the Numbers

So I'm going to check the temperature of the air being supplied to the home and I'm going to check the temperature of the air being returned to the unit. I'm going to find that delta and that will tell us our temperature of rise. We'll know if we're within spec. About 104 at that one, 103, 105, 106, 104, 105. So about 105 on average coming out of each vent and we'll check the return temperature now. 70, 80. Way up there. So we're going to be a little inaccurate because we've got all that heat up there but 80. So that furnace should have a 35 to 65 degree temperature rise. We're at 29. I think if we let that unit run a little bit longer that would have increased. I'm not worried about 29. If anything I kind of like that it's a little bit on the lower side. That tells me we don't have any major air flow problems.