Space-Ray has expanded its line of unitized low-intensity gas-fired infrared tube heaters, as well as its line of U-tube heaters. The expansions enhances Space-Ray's capability to custom design a radiant heating system that meets precise facility requirements for optimum flexibility, economy and maximum energy. Available in both natural and propane gas, the ETS/ETU Series Low-Intensity Infrared Tube Heaters now includes 19 different heaters in more than 100 different configurations. The ETS/ETU line ranges in capacity from 40,000 to 250,000 Btu/hr. The ETU Series tube heaters come in seven configurations and provide more uniform heat distribution, making them ideal for spot and high heat loss heating applications. In contrast, the ETS Series tube heaters are available in multiple configurations, including straight, L-shape, expanded U-shape or Z-shape, and are ideal for meeting complete building requirements. Space-Ray's expanded line of LTS/LTU low-intensity U-tube heaters also range in capacity from 40,000 to 250,000 Btu/hr and come in 19 different models. Available in both natural and propane gas, the LTS/LTU line of U-tube heaters has a total heater length varying from 17 ft. to 27.5 ft. to provide optimum flexibility in meeting exact industrial or commercial building heating requirements. Space-Ray.