Solaronics gas fired infra-red Suntube systems are ideal for any commercial or industrial building. Inlet air capabilities make them particularly well adapted for buildings with high negative pressure or airborne contaminants such as dust, over-spray and degreasing fumes. Directly vented units are an ideal choice for buildings with low infiltration or where condensation is a problem. Although not explosion proof, Suntube has no open flame. Solaronics gas fired infra-red Suntube systems are avail able in many different input capacities, system lengths and configurations. AGA and CGA design certified heater capacities are 40, 000 thru 200, 000 BTUH every 5, 000 BTUH. They are available in 10, 20′, 25, 30′, 35, 40′, 45′, 50′, 55′, 60′, 65′, and 70′ system lengths in both straight and compact U-tube configurations. Each system comes factory preassembled in 5′ or 10′ long sections to eliminate loose hardware and for ease of field installation. Suntube is design certified for either directly or indirectly vented operation and for use with inside or outside combustion air.