Rupp Air Modular Direct Gas Fired Make Up Air Unit, Heated, 3000 CFM with 20” Mixed Flow Direct Drive Fan - Natural Gas

Direct Gas-Fired Heated Make-Up Air Unit with 20" Mixed-Flow Direct Drive Fan

The Rupp Air R2D.250-20D is a direct gas-fired heated make-up air unit engineered to supply tempered outdoor air for commercial and industrial ventilation systems. Featuring a 20" direct-drive mixed-flow fan, this unit delivers up to 3,000 CFM and 259,200 BTU/h of direct-fired natural gas heating. Built with heavy-gauge G90 galvanized steel, it is designed for down-discharge roof or pad installations requiring reliable, continuous airflow.

Equipped for precise environment management. The R2D.250-20D features a remote space HMI touchscreen, factory-installed i500 series VFD for variable-air-volume (VAV) speed control, and an integrated total CFM monitoring package. The unit includes a self-adjusting burner profile, motorized low-leakage backdraft damper, sloped intake with washable metal mesh filters, freezestat protection, and an insulated flat roof curb for complete turn-key operation.

Rupp Air Features & Benefits

• 20" Mixed-Flow Direct Drive Fan: Delivers high-efficiency airflow (3,000 CFM @ 0.500" wc ESP) without the maintenance demands of belt-driven blower systems.
• Direct-Fired Natural Gas Heating: Provides 259,200 BTU/h of clean, near 100% efficient heat directly in the airstream with an 80°F temperature rise capability.
• Fuel Type Flexibility: Factory-configured for natural gas operation, with liquid propane options available to accommodate site-specific fuel requirements.
• Remote Digital HMI & VFD Control: Includes a remote space HMI for room temperature management paired with a factory-installed i500 series VFD for VAV speed adjustment.
• Total CFM Monitoring: Integrated ±15 pressure transducer system with pneumatic tubing continuously measures unit airflow performance.
• Sloped Filtered Intake: Features a weather-resistant intake hood equipped with 2" MV EZ Kleen aluminum mesh filters for reliable pre-filtration.
• Heavy-Duty Enclosure & Curb: Constructed with G90 heavy-gauge galvanized steel and supplied with a matching insulated flat roof curb for secure installation.
• Integrated Safety Controls: Pre-wired with motorized backdraft damper interlocks, freezestat protection, commercial smoke detector interlock relays, and low-fire start capability.

What's Included

Each Rupp Air R2D.250-20D package includes the direct gas-fired heated make-up air unit with a 20" mixed-flow direct drive fan, a sloped filtered intake with 2" MV EZ Kleen metal mesh filters, 0–150°F discharge temperature control with a remote space HMI, a DF2 gas manifold with dual pressure gauges and 1" butterfly modulating valve, low fire start, motorized low-leakage backdraft damper with LF120S actuator, damper proving relay, freezestat, commercial smoke detector interlock, exhaust fan start interlock relay, factory-mounted Lenze i500 series VFD with a VAV wiring package, total CFM monitoring system, down discharge construction, electrical cabinet LED lighting, and an insulated flat roof curb with full bottom curb corners.

Safety Features

• Redundant Gas Valves: Dual automatic safety shutoff valves protect the gas manifold.
• Timed Safety Lockout: Intermittent spark ignition system with timed lockout on ignition failure.
• High-Temperature Limit: Thermal limit switch monitors discharge air to prevent overheating.
• Airflow & Damper Proving: Airflow switch and damper proving relay verify proper air movement before firing.
• Freezestat Protection: Automatically shuts down airflow or signals controls to protect equipment from low intake temperatures.
• Smoke Detector Interlock Relay: Features pre-wired NO contacts for integration with commercial building fire alarm systems.
• Burner Observation Port: Integrated sight glass allows safe visual inspection of the burner flame.

Warranty Information

RuppAir provides a 2-year limited warranty covering defects in materials and workmanship under normal use and service. The warranty period is 24 months from the date of shipment. Defective parts covered by the warranty will be repaired or replaced at no charge after examination by RuppAir.

The warranty does not apply if the equipment is not installed by a qualified installer according to the manufacturer's installation instructions, is not installed in accordance with applicable federal, state, and local codes, is misused or neglected, is operated outside its published capacity, or the invoice is not paid according to the sales agreement. The buyer is responsible for all labor costs associated with warranty repairs or replacements. For complete warranty details, terms, conditions, exclusions, and limitations, please refer to the RuppAir Warranty Policy.