In-Forcer™ fresh and combustion air-intake systems provide a cost-effective solution to improve indoor air quality associated with today’s tight home and building construction, says the manufacturer. All models feature a compact design for quick, easy installations, the company says. Outside air is drawn in through 3-in. PVC pipe and tempered with inside air. Fresh-air models operate based on a user-programmable timer. Combustion-air models interlock with heating equipment to ensure combustion air, eliminating a major cause of backdrafting, says the company.
Tjernlund Products Inc., 1601 Ninth St., White Bear Lake, MN 55110-6794; 800-255-4208 or 651-426-2993; 651-426-9547 (fax).