6-year limited Tank warranty, 6-year parts warranty for Residential applicationsUltra-Low NOx High RecoveryCode Compliance - The Ultra-Low NOx atmospheric vent residential gas water heater meets the thermal efficiency and standby loss requirements of the U. S. Department of Energy and Current Edition ASHRAE/IESNA 90.1 Fully Automatic Controls with Safety Shutoff - Accurate, dependable control system requires no electric connections. Fixed automatic gas shutoff device for added safety Heavy Gauge Steel Jacket - Finished with baked enamel over bonderized undercoat Blue Diamond Glass Coating - Provides superior corrosion resistance compared to industry standard glass lining (Price subject to change without notice. Check stock before order)