This is a original 1888 Renzor heater by George Renzor the inventor of waste gas heaters. The first production of the heater was in a small plumbing and tin shop, w the heaters were made entirely by hand.Many original Renzor heaters are priced anyw from $1,000 and up. This heater is in good condition and is all original. Made from copper alluminum and steel. Hope this can be a great addition to sombody's fabulous collection of antiques.