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High-efficiency gas fireplaces offer a safe, energy-efficient and environmentally friendly alternative to conventional wood fireplaces. Well-designed and energy-efficient gas fireplaces can be installed as a completely new fireplace or as a conversion of an existing wood fireplace.

A high-efficiency gas fireplace burns natural gas or propane to generate heat by means of radiation and convection that is distributed by a circulating fan(s). Modern gas fireplaces protect indoor air quality by using sealed combustion to isolate the burner and flue from the indoor air and by circulating the air in your home through an air filter.



  1. Outside Wall
  2. Side Vent
  3. Exhaust Gas
  4. Outdoor Air For Combustion
  5. Optional Fan
  6. Convection Air Intake
  7. Radiant Heat
  8. Convective Heat
  9. Optional Top Vent Chimney

Did you see a building science or energy efficiency term you did not understand? Check out our glossary.