Hi Guys, I have a 3-core, 22" x 25" water-to-air heat exchanger coil which I'm using to build a heater for a pole building. The case I made is large enough that I can mount the squirrel cage blower inside of the case with a filter on the back to filter in-coming air. However, this would result in the blower being about 5 inches away from the coil. Mounted that close, I'm concerned that only the center of the coil might be used. Just wondering how critical the distance is between the heat exchanger coil and the blower motor for best efficiency?