Gas-fired products regulated by fuel gas codes

UL certification programs and services for gas-fired products help code authorities and designers achieve safe, code compliant installations.

Residential gas-fired appliances

Residential gas-fired appliances certified to nationally recognized standards, including UL, ANSI Z21/Z83 Series and CSA/CGA standards. Learn more.

All gas-fired appliances

Boiler assemblies (UL 795) Information Manufacturers

Central furnaces, forced air units (ANSI Z.21.47/CSA 2.3,) Information Manufacturers

Clothes dryers, Type 1 (ANSI Z21.5.1/CSA 7.1) Information Manufacturers

Clothes dryers, Type 2 (ANSI Z21.5.2/CSA 7.2) Information Manufacturers

Cooking appliances, household (Z.21.1, UL 858) Information Manufacturers

Cooking appliances, outdoor (ANSI Z.21.58/CSA 1.6) Information Manufacturers

Cooking appliances, outdoor specialty (ANSI Z.21.89/CSA 1.18) Information Manufacturers

Cooking appliances, commercial (ANSI Z.83.11/CSA 1.8) Information Manufacturers

Decorative appliances for installation in vented fireplaces (ANSI Z21.60/CGA 2.26) Information Manufacturers

Decorative appliances for installation in vented fireplaces, manually lighted (ANSI Z21.84) Information Manufacturers

Fuel cell power systems, stationary (ANSI/CSA America FC-1) Information Manufacturers

Illuminating appliances, indoor/outdoor (ANSI Z.21.42) Information Manufacturers

Patio heaters, infrared (ANSI Z.83.26/CSA 2.37) Information Manufacturers

Radiant heaters, commercial (ANSI Z.83.19/CSA 2.35, ANSI Z.83.20/CSA 2.34) Information Manufacturers

Room heaters, unvented (ANSI Z21.11.2) Information Manufacturers

Room heaters, vented (ANSI Z.21.86/CSA 2.32) Information Manufacturers

Swimming pool and spa heaters (ANSI Z21.56/CSA 4.7 UL 1563) Information Manufacturers

Toilets (ANSI Z.21.61) Information Manufacturers

Unit Heaters (ANSI Z.83.8/CSA 2.6) Information Manufacturers

Water heaters with input above 75,000 Btu per hour (ANSI Z.21.10.3) Information Manufacturers

Water heaters with input 75,000 Btu per hour or less (ANSI Z.21.10.1/CSA 4.1) Information Manufacturers

Water heaters, commercial and industrial (UL 795) Information Manufacturers