Northern Tool offers the Thermosphere 10,000-watt 34,121 BTU 1- or 3-Phase Ceiling-Mount Garage Heater for $549.99. Coupon code "254876" cuts it to $529.99. Opt for in-store pickup to dodge the $17.99 shipping fee. That's $70 off and the lowest price we could find. Features include a nickel chromium alloy resistance heating element, adjustable thermostat, enclosed motor, visible power and caution light, adjustable tilt angle with safety lock, adjustable louvers, and thermal safety cutoff. It comes with a terminal to connect the wall thermostat. Deal ends October 17.