The ETL-listed rooftop draft inducers are available in RT and RTH versions. RT models are designed for exhausting gas or oil heating equipment, gas fireplaces, and ovens. These units include a fan-proving switch. Several optional heater interlock controls, including the UCRT combination interlock and speed control, are available. RTH models are designed for solid-fuel fireplaces, stoves, ovens, barbecues, and general-purpose exhausting. RTH models include a wall-mount speed control. The two versions can be mounted on tile-lined chimneys or metal flues and have variable-speed motors for fine-tuning each installation. Features include a patented auxiliary cooling system to protect the fan motor from excessive heat as well as backward inclined fan blades that repel soot buildup. Both versions come in two capacity ranges: 250-750 cfm and 750-1,500 cfm. The clamshell design - separate base plate and fan assembly - are hinged for easier installation. During inspection or servicing, the fan assembly can be tilted away from the base plate for maximum accessibility to the chimney or vent pipe interior.
Tjernlund Products Inc., 1601 Ninth St., White Bear Lake, MN 55110-6794; 651-426-2993 or 800-255-4208; 651-426-9547 (fax); www.tjernlund.com