The company says its gas infrared heaters are available in two series for commercial, industrial, and institutional heating applications. The FLTH-FLUT Series features positive pressure, radiant tube heaters in straight and U-shaped designs from 30 to 60 ft in overall length. All models utilize aluminized steel for the combustion chamber and emitter tubing. Heaters operate on either natural gas or LP, with burners rated at 75, 100, 125 and 150 MBtuh input. The FL Series, meanwhile, consists of unvented, high-intensity heaters that use modular ceramic burners to maximize fuel efficiency and reduce combustion by-products. Heaters operate on either natural gas or LP and are rated from 20,000 to 120,000 Btuh input. All models are CSA, formerly AGA, design certified for indoor use.
— Fostoria Industries, Inc.