By Regency

Energy gas insert

$3,901.00
$3,901.00
Shipping calculated at checkout.
Model: U31
Fronts: Low Profile
Inner panels: None
Official WarrantyUp to 24-month manufacturer warranty.
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Availability: In stock
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Liberty gas insert
RegencyLiberty gas insert
$3,901.00
$3,901.00

The Regency Energy series — U31, E33, and E18E — offers efficient gas inserts tailored to different room sizes and heating needs. The U31 (28 1/8" W × 22 1/2" H × 14" D) is a classic B-vent insert with up to 30,000 BTU/h, ideal for spaces up to 1,000 sq. ft. The direct vent E33 (34 1/4" W × 24 1/4" H × 16" D) delivers 38,000 BTU/h for rooms up to 1,800 sq. ft., while the compact E18E (25 3/4" W × 17 1/4" H × 14 3/4" D) provides 20,000 BTU/h for up to 800 sq. ft. All models include programmable thermostats, durable builds, and timeless design — perfect for upgrading traditional fireplaces with modern gas heating.

 

Performance

Fuel: Natural gas or propane
Heating Area:

  • U31: Up to 1,500 ft²
  • E33: Up to 2,000 ft²
  • E18E: Up to 800 ft²

Max Heat Output:

  • U31: 30,000 BTU/h (NG), 27500 BTU/h (LP)
  • E33: 38,000 BTU/h (NG), 35,500 BTU/h (LP)
  • E18E: 21,600 BTU/h (NG), 20,500 BTU/h (LP)

Efficiency:

  • U31: 58.45%(NG) 59.29%(LP)
  • E33: 70.14% (NG), 60%(LP)
  • E18E: 74% (NG), 74.81(LP)

Dimensions

Unit Size (H × W × D):

  • U31: 21″ × 26½″ × 15″
  • E33: 24 ³⁄₁₆″ × 32¼″ × 16¾″
  • E18E: 231/2″ × 25″ × 11″

Weight:

  • U31: 120 lb
  • E33: 214 lb
  • E18E: 108 lb

Chimney:

  • U31: B-Vent (4″) or flex vent
  • E33 / E18E: Direct vent

Features

Combustion Type: Non-catalytic
Certification: CSA & UL/ULC listed
Glass Door: Ceramic glass with safety screen