Mr. Heater® infrared heaters direct line-of-sight radiant heat to floor-level objects, which in turn heat the surrounding air to the desired temperature. Personnel and objects at floor level enjoy instant, cost-saving comfort. This tube set consists of three 10-foot tube sections for use with a burner box that generates 80,000 BTU (part number F102652XL / 6350142), or a burner box that generates 100,000 BTU (part number F102654XL / 6350143). It can be mounted horizontally or at a 45-degree angle. Each ten foot tube section includes stainless steel couplers and chrome-plated hanging brackets. The Mr. Heater® burner box (sold separately) is requires in order to generate heat. Burner boxes come ready for natural gas, and include propane conversion kits. All components are name-brand and non-proprietary.