True Dual MTSA 2-Stage

True Dual Two-Stage Gas Infrared Tube Heaters provide precise air to gas ratios at both high and low heat stages for optimum efficiency.

Excessive overheating is prevented and a softer, more stable and comfortable environment is maintained. Can save up to 75% in energy costs, and typically 10-15% savings over a single stage tube heater.

Corrosion resistant two-stage tube heater built with our heat-treated aluminized swaged tube connection package. Perfect for indoor applications such as vehicle wash bays, steel warehousing, and indoor swimming pools, including harsh or corrosive environments. More information below.

  • Two-stage operation with both gas and air modulated for high and low heat
  • 16 gauge titanium coated aluminized steel, heat-treated, combustion chamber
  • Corrosion resistant 16 gauge 4” O.D. aluminized steel, heat-treated, heat exchanger
  • Swaged tubes for easy installation
  • Simple chain mounting
  • CSA International Design Certified to ANSI/CGA Standards
  • Mill finish aluminum reflectors
  • 91.7% reflectional efficiency (shape)
  • Rotatable reflector arrangements from 0° to 30°
  • Burner fully assembled and tested – ready to hang
  • Factory installed wave turbulator for high efficiency
  • Safe, reliable operation
  • Durable direct spark ignition
  • 100% safety shut-off
  • Pre-purge cycle for safety
  • System validation light


  • Recessed Ceiling Kit
  • Side Reflector
  • 90° Elbow with reflector
  • Common Vent Couplers
  • Inlet and Exhaust Kits
  • Blower Enclosure
  • 50 Hz for Worldwide Operation
  • Stainless Steel Construction

Manifold Operating Pressure
Natural Gas and LP/Propane: 5 inches WC

Minimum Inlet Pressure
Natural Gas: 7 inches WC
LP/Propane: 11 inches WC

Maximum Inlet Pressure
Natural Gas and LP/Propane: 14 inches WC 1/2 inch FPT Gas Inlet

Electrical Rating
120 VAC – 60 Hz – 1 Phase
2.30 max. amp. draw at 138 cfm/free air

10 year limited warranty on Burner Core
10 year limited warranty on All Combustionand Heat Exchanger tubes
2 year limited warranty on All Burner Controls

  • Maintenance Facilities
  • Manufacturing Plants
  • Aircraft Hangars
  • Auto Dealerships
  • Sports Facilities
  • Farm Buildings
  • Loading Docks
  • Warehouses
  • Fire Stations
  • Car Washes
  • Body Shop