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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 11-00110 MBC FILTER KIT

11-00110 MBC FILTER KIT

HYDROTHERM:11-00110
SKU: HYDROTHERM:11-00110
$77.96
Picture of 04-1345 GROUND ROD

04-1345 GROUND ROD

HYDROTHERM:04-1345
SKU: HYDROTHERM:04-1345
$79.20
Picture of BM-7197 HYDROTHERM VALVE DIAPHRAM KIT

BM-7197 HYDROTHERM VALVE DIAPHRAM KIT

HYDROTHERM:BM-7197
SKU: HYDROTHERM:BM-7197
$79.20
Picture of BM-8072 Hydrotherm BM-8072 (Honeywell Q314AKB) Natural Gas Pilot Assembly (Standing Pilot)
Picture of PILOT SENSOR PSE-NA29*

PILOT SENSOR PSE-NA29*

HYDROTHERM:BM-8787
SKU: HYDROTHERM:BM-8787
$80.44
Picture of 22-1203 30 PSI RELIEF VALVE

22-1203 30 PSI RELIEF VALVE

HYDROTHERM:22-1203
SKU: HYDROTHERM:22-1203
$81.68
Picture of 22-1204 15 PSI RELIEF VALVE (STEAM, MALE THREAD)

22-1204 15 PSI RELIEF VALVE (STEAM, MALE THREAD)

HYDROTHERM:22-1204
SKU: HYDROTHERM:22-1204
$81.68
Picture of 22-1205 15PSI RELIEF VALVE

22-1205 15PSI RELIEF VALVE

HYDROTHERM:22-1205
SKU: HYDROTHERM:22-1205
$81.68
Picture of 15PSI RELIEF VALVE

15PSI RELIEF VALVE

HYDROTHERM:22-1401
SKU: HYDROTHERM:22-1401
$81.68
Picture of AIR FILTER

AIR FILTER

HYDROTHERM:20-00003-001
SKU: HYDROTHERM:20-00003-001
$82.91