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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 5 PORT SEAL

5 PORT SEAL

HYDROTHERM:59-2004
SKU: HYDROTHERM:59-2004
$28.46
Picture of 5 VENT DAMPER

5 VENT DAMPER

HYDROTHERM:02-5835
SKU: HYDROTHERM:02-5835
$295.76
Picture of 5 VENT DAMPER

5 VENT DAMPER

HYDROTHERM:02-5875
SKU: HYDROTHERM:02-5875
$304.42
Picture of 50036PB PRESSURE SWITCH

50036PB PRESSURE SWITCH

HYDROTHERM:50036PB
SKU: HYDROTHERM:50036PB
$59.40
Picture of 50037PB PRESSURE SWITCH

50037PB PRESSURE SWITCH

HYDROTHERM:50037PB
SKU: HYDROTHERM:50037PB
$86.63
Picture of 50038 GROUND ROD PSE

50038 GROUND ROD PSE

HYDROTHERM:50038
SKU: HYDROTHERM:50038
$69.30
Picture of 50163PB BURNER W/PILOT BRACKET (SPARK)

50163PB BURNER W/PILOT BRACKET (SPARK)

HYDROTHERM:50163PB
SKU: HYDROTHERM:50163PB
$86.63
Picture of 50167 VENT DAMPER W/HARNESS

50167 VENT DAMPER W/HARNESS

HYDROTHERM:50167
SKU: HYDROTHERM:50167
$796.95
Picture of 50192PB BURNER

50192PB BURNER

HYDROTHERM:50192PB
SKU: HYDROTHERM:50192PB
$77.96
Picture of 50212PB FAN

50212PB FAN

HYDROTHERM:50212PB
SKU: HYDROTHERM:50212PB
$1,236.26