For some reason I was thinking I saw specs on these that the BTU on the heat side was 32,000. I could be wrong and thinking of another unit, but I remember being surprised that the BTU wasn't much lower on heat than air. Air filter wasn't clogged on either unit. Plenty of air flow for sure!The heat coming out of mine is noticeable, but not ridiculous. The heat output is half of what the BTU rating is on unit, ie, a 36,000 BTU unit puts out 36,000 BTU AC, 18,000 BTU heat. My units will have the motor pool at temp in around an hour. Have you checked the air filter? It could be clogged reducing air flow.