Tjernlund Products’ DuctBooster Fans have been a tool of many heating contractors’ problem-solving arsenals, whether their need is to boost air flow to hard-to-heat or -cool rooms or exhaust foul air from a bathroom or pole barn. The fans operate quietly and have varying capacities for installation in metal and flex ductwork. Optional accessories are available for automatic activation and to control fan speed.

Tjernlund Products. www.tjernlund.com. Circle 51

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