Energy E21 Small Gas Insert

This compact Energy Gas Insert is perfect for heating smaller living areas.  Regency quality is evident in every detail – from high efficiency heat to custom styling. The E21 features the dancing flames of an exceptional Regency fire.


  • 23,500 maximum natural gas BTU and 22,500 maximum propane BTU
  • Proflame remote control (included)
  • Safety screen (included)
  • Whisper quiet variable speed blower to push the heat
  • Controllable heat with up to 50% flame turn down
  • B-vent application is ideal for older homes
  • Operates on natural gas or propane
  • Efficient upgrade to keep the heat in your home
  • The look of a wood fireplace with the convenience of gas
  • Heat radiating ceramic glass provides maximum viewing area
  • Realistic logs with beautiful flames and platinum infused bright embers


Front Width26.5"
Back Width18"
Glass size/ view area 318 sq. in.
Maximum BTU/ Hour Input 23,500 (natural gas) | 22,500 (propane)
Turn Down BTU 11,500 (natural gas) | 11,250 (propane)

Efficiency Chart

Steady State77% natural gas, propane
EnerGuide50.6% natural gas, 53.48% propane