This would make a great heater for a 2 car garage. Made by Q-Mark, runs on 208v, single or 3 phase. I dont know a whole lot about it, but specs can be found here: Qmark Type MUH Unit Heater
then scroll down to catalog# "MUH078". This is not a cheap heater. Its a few years old, but has very little use. Comes with mounting bracket and timer controller. Timer can be set in small increments up to 6 hours or put on hold, or you could just wire it direct to an on/off switch. Will not seperate from timer. $275.
If interested, please email D1802 (at) sbcglobal (dot) net
I have a few things listed on various sites and my little single track mind has a hard time keeping track of who asked what and on what site.