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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 THERMOCOUPLE K16RA-36D

THERMOCOUPLE K16RA-36D

HYDROTHERM:04-1337
SKU: HYDROTHERM:04-1337
$70.54
Picture of THERMOCOUPLE K16RA-48D

THERMOCOUPLE K16RA-48D

HYDROTHERM:04-1338
SKU: HYDROTHERM:04-1338
$50.74
Picture of THUMB SCREW

THUMB SCREW

HYDROTHERM:57-3657
SKU: HYDROTHERM:57-3657
$11.14
Picture of THUMB SCREW - FILTER BOX

THUMB SCREW - FILTER BOX

HYDROTHERM:57-01958-009
SKU: HYDROTHERM:57-01958-009
$9.90
Picture of TIE ROD 5/16 X 21 1/2

TIE ROD 5/16 X 21 1/2

HYDROTHERM:44-1105
SKU: HYDROTHERM:44-1105
$4.95
Picture of TIE ROD NUT

TIE ROD NUT

HYDROTHERM:57-2602
SKU: HYDROTHERM:57-2602
$2.47
Picture of TIE ROD WASHER

TIE ROD WASHER

HYDROTHERM:57-4601
SKU: HYDROTHERM:57-4601
$1.24
Picture of TOGGLE SWITCH

TOGGLE SWITCH

HYDROTHERM:58-1535
SKU: HYDROTHERM:58-1535
$24.75
Picture of TOUCHSCREEN OVERLAY

TOUCHSCREEN OVERLAY

HYDROTHERM:82-00410-001
SKU: HYDROTHERM:82-00410-001
$61.88
Picture of TRANSFORMER

TRANSFORMER

HYDROTHERM:51032
SKU: HYDROTHERM:51032
$24.75