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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 14-0009 HYDROSTAT FUELSMART AQUASTAT/LWCO CONTROL*

14-0009 HYDROSTAT FUELSMART AQUASTAT/LWCO CONTROL*

HYDROTHERM:14-0009
SKU: HYDROTHERM:14-0009
$282.15
Picture of 14-00301-001 PRESSURE SWITCH - HUBA

14-00301-001 PRESSURE SWITCH - HUBA

HYDROTHERM:14-00301-001
SKU: HYDROTHERM:14-00301-001
$34.65
Picture of 14-00304-001 PRESSURE SWITCH NS2-0334-00 3.0 WC

14-00304-001 PRESSURE SWITCH NS2-0334-00 3.0 WC

HYDROTHERM:14-00304-001
SKU: HYDROTHERM:14-00304-001
$25.99
Picture of 14-00306-001 PRESSURE SWITCH NS2 5.5 WC

14-00306-001 PRESSURE SWITCH NS2 5.5 WC

HYDROTHERM:14-00306-001
SKU: HYDROTHERM:14-00306-001
$25.99
Picture of 14-0201 FLOW SWITCH (IFS-1)

14-0201 FLOW SWITCH (IFS-1)

HYDROTHERM:14-0201
SKU: HYDROTHERM:14-0201
$201.71
Picture of 15-00106 BLOWER RELAY, SOLID STATE

15-00106 BLOWER RELAY, SOLID STATE

HYDROTHERM:15-00106
SKU: HYDROTHERM:15-00106
$115.09
Picture of 15PSI RELIEF VALVE

15PSI RELIEF VALVE

HYDROTHERM:22-1401
SKU: HYDROTHERM:22-1401
$81.68
Picture of 2 PORT SEAL

2 PORT SEAL

HYDROTHERM:59-2003
SKU: HYDROTHERM:59-2003
$11.14
Picture of 2 RUBBER SEAL

2 RUBBER SEAL

HYDROTHERM:59-1012
SKU: HYDROTHERM:59-1012
$39.60
Picture of 2 SQ HD PIPE PLUG

2 SQ HD PIPE PLUG

HYDROTHERM:56-4552
SKU: HYDROTHERM:56-4552
$49.50