HEATMOR Outdoor Furnaces have been manufactured for over 30 years. It is our passion for providing the longest lasting outdoor furnace in the market that has kept us ahead of the competition.. … HEATMOR Outdoor Furnaces have been manufactured for over 30 years. It is our passion for providing the longest lasting outdoor furnace in the market that has kept us ahead of the competition.. HEATMOR stainless steel outdoor furnaces are easy to load, maintain, operate, and are …