According to the manufacturer, the In-Forcer™ combustion air intake system eliminates traditional wall louvers, reduces wall-opening size up to 80%, and significantly reduces the cost of providing combustion air to mechanical rooms. The company says the system’s small wall or roof penetration does not require structural reinforcement or extensive masonry work. It can be ducted up to 100 ft. Capacities are available up to 3.7 MMBtuh. The company says its system complies with IMC and NFPA combustion requirements.

— Tjernlund Products, Inc.

White Bear Lake, MN