Radiant Patio Heater 13kw Outdoor Gas Warmer Grey Garden Fire Burner With Wheels Posted on November 16, 2023 by admin 13KW Grey Radiant Patio Heater. A stylish patio heater with adjustable output up to 13kW. Adjustable power output to 13kw. Runs on Propane or Butane Gas. Butane at 28-30 mbar (regulator required). Propane Regulator Included (rated 37 mbar).