The atmospheric residential water heater from Giant® features the FVIR technology and a 40,000 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 the installation. To benefit from the warranty, the water heater must not be laid on its side during transportation.