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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 PRESSURE SWITCH

PRESSURE SWITCH

HYDROTHERM:55541
SKU: HYDROTHERM:55541
$64.35
Picture of PRESSURE SWITCH

PRESSURE SWITCH

HYDROTHERM:50038PB
SKU: HYDROTHERM:50038PB
$77.96
Picture of PRESSURETROL

PRESSURETROL

HYDROTHERM:51324
SKU: HYDROTHERM:51324
$69.30
Picture of PROBE ONLY

PROBE ONLY

HYDROTHERM:14-00202-002
SKU: HYDROTHERM:14-00202-002
$105.19
Picture of PURGE TIMER ST7800

PURGE TIMER ST7800

HYDROTHERM:02-4014
SKU: HYDROTHERM:02-4014
$47.03
Picture of PUSH NIPPLE

PUSH NIPPLE

HYDROTHERM:53-1310
SKU: HYDROTHERM:53-1310
$6.19
Picture of RAISED AIR MANIFOLD

RAISED AIR MANIFOLD

HYDROTHERM:01-00001-001
SKU: HYDROTHERM:01-00001-001
$315.56
Picture of RATING LABEL

RATING LABEL

HYDROTHERM:42-2997
SKU: HYDROTHERM:42-2997
$9.90
Picture of RATING LABEL

RATING LABEL

HYDROTHERM:42-2999
SKU: HYDROTHERM:42-2999
$9.90
Picture of RATING LABEL

RATING LABEL

HYDROTHERM:82-00004-001
SKU: HYDROTHERM:82-00004-001
$9.90