Tungsten Portable Patio Heater 500 PropaneTungsten Heater Portable 500 Propane Neutral black finish and award winning design makes it a piece of modern art. This is the perfect heater to make your outdoors more enjoyable throughout the year! Great for cold days or when the sun goes down to keep you warm. Popular for restaurants, outdoor venues, lake homes and work spaces outdoors. Modular construction with built in wheels. Adjustable tilt head. Adjustable heat output from 21300BTU 38,500BTU.