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Cambridge HTHV Space Heating Systems are designed to meet a building’s heat and air load requirements. Our unique blow-thru design, with 160°F maximum temperature rise and discharge temperature, delivers more usable heat and thermal comfort with minimal temperature variation throughout the heated space. This commercial/industrial space heater is 20% to 70% more energy efficient than all other types of indirect and direct gas-fired systems used to heat large commercial and industrial buildings.

Discharge air from the S-Series HTHV Heater creates a large volume of fresh, warm air flowing throughout the building which eliminates higher ceiling temperatures and uncomfortable drafts. The S-Series Heater utilizes 100% fresh air to dilute contaminants generated within the building. This virtually eliminates air quality problems associated with infrared heaters or conventional air heating systems that recirculate indoor air.

Energy-saving HVAC (Heating, Ventilating & Air Conditioning) retrofits include replacing Boiler, Unit Heater, Air Turnover, Infrared, Make-Up Air (MAU) and Recirculation (80/20) heating systems.


  • Proprietary high efficiency, stainless steel burner
  • Certified for both 160°F temperature rise and 160°F discharge temperature at 0°F outside air
  • Unique Blow-Thru design extends the life of critical components
  • Industry-leading warranty package – 2 years on the heater and 5 years on the Cambridge burner
  • Pre-piped and pre-wired to make installation and start-up easier
  • Compact size takes up less valuable interior storage or production space


The most energy efficient way to heat both new and existing buildings with large open spaces such as:

  • Warehouses
  • Distribution centers
  • Manufacturing & assembly plants
  • Indoor sports facilities
  • Automobile dealership service bays
  • Car washes
  • Aircraft hangars
  • Boat storage facilities
  • Waste water treatment plant facilities
  • Many more!



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Cambridge Engineering SA-Series

SA – Series High Efficiency Space Heaters exhibit an innovative, compact design for commercial / industrial HVAC, offering flexibility to be used for various building types and applications. It is a highly efficient direct replacement for unit heaters and doesn’t have all the complexity of a condensing system.

When properly applied, our highly efficient space heaters will heat the least amount of fresh air required to address the facility’s air infiltration, make-up air and space heating needs. Computer energy modeling has found that Cambridge SA-Series Space Heaters are 20% to 70% more energy-efficient than all other types of indirect and direct gas-fired systems used to heat and/or ventilate commercial and industrial buildings.

The SA – Series energy efficient space heaters can be installed in new construction projects, as part of a plant expansion, a renovation as part of an HVAC upgrade or a retrofit.

SA – Series Features:

  • Proprietary blow-thru technology not found in conventional draw-thru make-up heaters.
  • The low voltage hot surface igniter with Cambridge’s patented Low Fire Start provides the most dependable and energy efficient gas ignition system for direct fired heaters
  • High efficiency, stainless steel burner and flame rod reduces the need for continuous maintenance and extends service life
  • Lightweight unit build is pre-piped and pre-wired to make installation and start-up quick and easy


The most energy efficient way to heat both new and existing buildings such as:

  • Warehouses
  • Manufacturing & Assembly Plants
  • Parking Garages
  • Automotive Service & Repair Facilities
  • Fire Stations
  • Commercial Kitchens
  • Retail Stores