Shop/Garage Heater suggestions please

13000-BTUGarage-Fan-Heater-1.jpg
This is what I have in my attached garage that measures 24'x26' with 10' ceilings. It is insulated with 2x6 walls and a 10' ceiling. It is 20amp, 220 volt so it is easy to wire in and cheap to buy. It will easily heat me right out of that garage, and If I had a ceiling fan, it would barely run to maintain a temperature.

Cley