WOW! SOOOOOOO, much more heat is thrown out of this thing than my Harman. Yes, there is a difference between 45,000 BTU and 32,000 BTU. I work on a lot of Meridians and Whitfields but haven't had one of my own to tinker with...I must say, this is a great little machine that is very well priced. This thing may end up in my house. It would be so nice to have an igniter and thermostat.