Hoping someone can offer some guidance. I do want to state that I will not be doing the work myself but will have a licensed electrician replace the motor in my unit heater if it is a good option. I am asking here instead of playing phone tag with the electrician and waiting two weeks for a call back plus I know there are a lot of experienced folks here that can tell me if I'm thinking in the right direction.
Here's the question:
I have a Reznor vertical hydronic unit heater model hh-175. It's currently used for on-demand heating of a garage. The heater has a 1/30 hp motor that turns at 1550 rpm's. Problem I'm having is that the heater puts out some decent heat and raises the temp of the room but not quite enough to overcome the drafts in the old building when it's really cold out. The hot water to the heater is about 190 degrees which according the heater manual produces about 60k btus at about 550 cfm. The hot water return on the heater is still extremely hot so it appears that the heater does not deplete the heat from the coils all that much. What I'd like to do is put a larger motor on it to try and increase the cfm's to use more of the heat that appears to be available. Doing the also may increase air circulation in the room to spread the heat around a bit more also. Does this sound like a good or a bad idea ?
Thanks,
Mark