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Pulse Boilers

A pulse combustion boiler is similar to a car engine in that both have continuous tiny air and gas charges that ignite many times per second. The pulse provides the necessary combustion pressure to direct-vent combustion products without fan assistance. Unlike conventional power burners, pulse boilers are modulated by using a standard butterfly valve in the gas line and a butterfly valve in the exhaust line. The result is a boiler that offers 5:1 turndown for precise load matching capability.

Hydronic boiler efficiency is a function of return water temperature and heat-transfer effectiveness. When operating in the condensing mode with cold water entering, pulse combustion boilers are up to 95 percent efficient. That compares with other high-efficiency boilers that range from 80 to 85 percent efficient. Conventional boiler efficiency is 70 to 75 percent.

Features of a Pulse Boiler include:

  • No expensive chimney or stack is required. Vents through the roof or sidewall.
  • No boiler room makeup air is required. Combustion takes place in a sealed combustor.
  • No moving parts. Only a small assist fan needed for starting.
  • A simple spark plug is all that's required for ignition.
  • Low NOx emissions.
  • Quieter than most conventional power burners.
  • Stand-by losses are nearly nonexistent due to air metering valve.
  • Small footprint and elimination of chimney, stack and makeup air requirements allows for individual units in each building of multi-building complexes or in isolated areas of large plants.
  • Fits through standard door openings.
  • Simpler design of pulse combustion system compared to a conventional power burner results in the lowest maintenance requirements in the industry.
  • No primary/secondary loop required to maintain minimum return water temperature.
  • No minimum or maximum flow requirements.