need help w radiant tube heater

[Piper]

HI

So my new garage build is 24 x 32 x 11 foot ceiling. On 1 of the long sides there are 2 garage doors, 1 on the opposite long side. Above this garage there will be living space (no access from garage). I plan on putting a radiant tube natural gas heater hanging from the ceiling, closer to the back of the garage (where the 1 garage door is). I've been told by a dealer that their residential unit which is 45,000 btu would be fine. This heater is just under 10' long and they've suggested I hang it ~2' from the back 32' long wall. I'm wondering about people's thoughts on this. While 45,000 btu sounds ok size-wize, I'm kind of thinking that either side of this unit will be fairly cool. Would I be better with a 24' long unit that has less "uncovered" space on either side? With 32' wide and 10' of heater, that leaves 11' on either side.

Thoughts or suggestions appreciated.

Piper

 

[Fueler]

I have radiant heat. 40x40 The cool zones you wonder about don't exist. Once everything is heat soaked it levels out across the room. Case in point. If I leave the bathroom door closed in the winter the bathroom is noticeably colder. It's against the northern outside wall. Leave the door open and it comes up to the same temperature...and it is no where in line of sight of the tubes.

2 bay garage? I would hang it down the middle between the bays. IF that back wall contains your work bench you will likely not like being directly under the tube when it runs. Also, a little note that the end of the tube closest to the burner will be hotter. I suggest having that end closest to the opening doors if possible.