The quality treadmill should not be influenced by normal room temperature. If your garage temperature is higher, pray tell, why?

More to the point, to my mind: Will you enjoy treadmilling in a garage? I had a treadmill in the house, and came to a two-fold realization:

1. I didn't like using it in the house.
2. I didn't like treadmills any more. Actually, never did, but pretended to, for various "It's good for me" reasons.

Also, I noticed when I hiked or went for runs, the ground did not run toward me in conveyer-belt fashion. Didn't force me to keep a certain pace.

I am back to running, loving it more than ever.

Anyhow, if treadmill in the garage is your solution, hope it's fun and happy time for you.