The atmospheric residential water heater from Giant® features the FVIR technology and a 38,000 BTU burner. The interior of the tank is coated with a blue cobalt glass enhanced with zircon, a feature unique to Giant®. It is equipped with a stainless steel flame controller and a manual re-engagement thermal switch. Its high-quality magnesium anode offers greater protection against the corrosive effects of water. In addition, its GreenFoam® ecological foam insulation contains no HCFCs, CFCs nor VOCs. This water heater requires a chimney. This product is manufactured in Canada and is covered by a six (6) year limited warranty against leaks and parts from the date of installation.