SB6019: MAU-1 – CaptiveAire Direct-Fired Make-Up Air Unit (MAU), Natural Gas, Roof-Mounted Industrial Air Heater with Gas Manifold and Damper Motor Access

This listing is for MAU-1, a CaptiveAire direct-fired make-up air unit (MAU) engineered to deliver tempered outside air for industrial and commercial buildings. Unlike recirculating rooftop units, this system provides 100% outdoor air, ensuring proper building pressurization and air quality where exhaust fans or process ventilation remove large volumes of air. The unit features a natural gas manifold assembly with safety shut-off valves and controls, as well as an accessible damper motor section for regulating airflow. Constructed from heavy-gauge galvanized steel, the housing is corrosion-resistant and designed for rooftop exposure. The system delivers direct-fired heat through an integrated burner, eliminating the need for a separate heat exchanger and maximizing efficiency. Key specifications: Manufacturer: CaptiveAire Systems, Inc. Type: Direct-fired make-up air unit (MAU) / air handler Fuel: Natural gas Electrical: 460 V, 3-phase (verify per nameplate) Construction: Galvanized steel, weather-resistant cabinet Air Control: Integrated damper motor access and gas manifold inside Application: Industrial ventilation, process air, warehouse heating, or food-service make-up air Operation: 100% outdoor air, direct-fired burner for tempered air supply Condition: In-place installation; buyer responsible for lockout/tagout, refrigerant recovery, full disconnection, gas-line demo and capping, duct and piping removal, and rigging/removal per site and EPA standards.