Overview

The Flagro FMA-550 is a high-capacity 550,000 BTU makeup air heater designed to provide a dependable supply of heated fresh air for construction sites, industrial facilities, warehouses, and temporary work environments. By replacing exhausted indoor air with warmed outdoor air, the unit helps maintain comfortable working conditions while supporting proper ventilation.

Ideal for applications where exhaust fans or dust collection systems create negative air pressure, the Flagro FMA-550 delivers consistent heating while helping reduce drafts and improve overall air quality. Its rugged construction makes it well suited for demanding jobsite conditions, including temporary structures, equipment enclosures, renovation projects, and manufacturing facilities.

Whether used for worker comfort, drying, curing, or ventilation, the Flagro FMA-550 provides reliable temporary heating and fresh air where it’s needed most.