Products regulated by mechanical codes
UL certification programs and services help code authorities and designers achieve safe, code compliant installations.
Boilers and water heaters
Electric, solid-fuel fired, gas-fired and oil-fired units. Learn more.
Chimneys and vents
Includes factory-built chimneys, chimney liners, vents, connectors and related products. Learn more.
Products intended for use in commercial kitchens. Learn more.
Products used in air-conditioning, heating, and ventilating systems. Learn more.
Fireplaces and room heaters
Factory-built fireplaces, accessories and heaters. Learn more.