Regency Energy Gas Insert

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.