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Hydrotherm

KN-Series Condensing Cast Iron Boilers from Advanced Thermal Hydronics (Hydrotherm) are the one and only high efficiency cast iron boiler ever made and offer an industry leading 25 year heat exchanger warranty. KN-Series Boilers combine the efficiency of condensing, gas-fired technology with the strength, durability and heat retention of time-tested cast iron construction. From raw materials to the state-of-the-art digital control system, the complete line of KN-Series products is proudly manufactured at the ATH facility in Boyertown, Pennsylvania. Utilizing decades of foundry and manufacturing expertise, KN-Series boilers are cast, machined, wired and assembled to the tightest standards possible resulting in a finished product that is all-American in terms of innovation, reliability and craftsmanship. Models available from 200,000 - 4,000,000 BTU/h.

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Picture of VENT SAFETY SWITCH (230 F)

VENT SAFETY SWITCH (230 F)

HYDROTHERM:50041PB
SKU: HYDROTHERM:50041PB
$30.94
Picture of VENTURI

VENTURI

HYDROTHERM:GX-82054-1
SKU: HYDROTHERM:GX-82054-1
$176.96
Picture of VENTURI

VENTURI

HYDROTHERM:GX-82990
SKU: HYDROTHERM:GX-82990
$433.13
Picture of VENTURI GASKET

VENTURI GASKET

HYDROTHERM:GX-82054-2
SKU: HYDROTHERM:GX-82054-2
$9.90
Picture of VFD KIT

VFD KIT

HYDROTHERM:BM-1536
SKU: HYDROTHERM:BM-1536
$2,724.98
Picture of VFD UPGRADE KIT W/TEKMAR

VFD UPGRADE KIT W/TEKMAR

HYDROTHERM:BM-1533
SKU: HYDROTHERM:BM-1533
$2,619.79
Picture of VFD UPGRADE KIT W/TEKMAR

VFD UPGRADE KIT W/TEKMAR

HYDROTHERM:BM-1534
SKU: HYDROTHERM:BM-1534
$2,842.54
Picture of VIRTUOSO BOARD (10:1)

VIRTUOSO BOARD (10:1)

HYDROTHERM:40-00757-001
SKU: HYDROTHERM:40-00757-001
$642.26
Picture of WATER BLOCK

WATER BLOCK

HYDROTHERM:BM-2050
SKU: HYDROTHERM:BM-2050
$2,499.75
Picture of WATER BLOCK

WATER BLOCK

HYDROTHERM:BM-2051
SKU: HYDROTHERM:BM-2051
$3,190.27