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HydroTherm Boilers

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Hydrotherm manufactures residential and commercial boilers and has for more than 60 years. Today, as a division of Mestek Inc., the company is best known for its KN-Series of fully condensing cast iron commercial boilers.

Corporate History

HydroTherm is a division of Massachusetts-based Mestek Inc. Mestek, dating back to the 1853 creation of the Mills Boiler, today is made up of 38 companies across several industries. Mestek acquired Northvale, N.J.-based HydroTherm’s assets in 1991. Today Hydrotherm is listed by its parent company under the brand name of its popular commercial boiler, KN-Series.

Product Lines

Hydrotherm’s residential boilers include gas-fired water and steam units as well as an oil-fired series.

The HWX gas-fired water boiler, available in five sizes, reportedly rarely requires maintenance, which is attributed to its simple design. HVX gas-fired water boilers come in four sizes designed for flexible installation. The HVX features an induced draft blower that easily vents flue gases up the chimney or through an outside wall. VGX gas-fired steam boilers come in seven sizes designed for dependability. Each reaches up to 82 percent AFUE.

The brushed stainless steel Sabre PB Series oil-fired boilers, both steam and water, were designed for their whisper-quiet operation and to be easily serviced by maintenance technicians.

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260 North Elm Street
Westfield, MA 01085

Phone: (413) 564-5515


HWX, HVX and PB Series boilers carry a limited lifetime warranty, while the VGX is covered only for 10 years.

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