The Richmond? Essential Plus? 30-gal Short Natural Gas Water Heater comes with a 2 years In Home Labor Warranty and has an energy efficient 30000 Btu burner featuring reduced emissions Low-NOx technology. This heater provides ample hot water for households with 2 people. The heater also features an FVIR System, an exclusive air/fuel shutoff device that prevents ignition of flammable vapors should they be detected outside the unit. The air intake is designed to be completely maintenance free with no filters to clean or replace. The heater has a 6 years tank warranty and meets or exceeds NAECA and ASHRAE requirements.