Original 1966 heating trade vintage catalog for HYDROTHERM, INC.  Main office and factory were located in Northvale, NJ.

Manufacturers of Multi-Temp Gas Hot Water Heating Plants.

Multi-Temp represents a new concept and use of gas for heavy duty hot water heating systems by providing any desired capacity with a multiple of Hydrotherm Boiler Units each equipped with its own set of controls. This permits 'true' input modulation which, in addition to important fuel savings, increases heating performances by eliminating short cycling during mild weather.

Has product images, detailed illustrations, description, applications and specifications charts to provide product info.

Unbound from a large rare 1966 Architectural Catalog, this unique old four-page technical brochure would display beautifully matted and framed. Awesome cover graphics. A fabulous addition to your retro heating and air conditioning (HVAC) equipment library.