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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 TRANSFORMER 43VA

TRANSFORMER 43VA

HYDROTHERM:26-3018
SKU: HYDROTHERM:26-3018
$48.26
Picture of TRANSITION COLLAR

TRANSITION COLLAR

HYDROTHERM:BM-8809
SKU: HYDROTHERM:BM-8809
$56.93
Picture of TUBING

TUBING

HYDROTHERM:54-3229
SKU: HYDROTHERM:54-3229
$27.22
Picture of UPPER COVER

UPPER COVER

HYDROTHERM:60-5646
SKU: HYDROTHERM:60-5646
$487.58
Picture of UPPER COVER

UPPER COVER

HYDROTHERM:75-00206-001
SKU: HYDROTHERM:75-00206-001
$2,079.00
Picture of UPPER COVER

UPPER COVER

HYDROTHERM:75-00206-002
SKU: HYDROTHERM:75-00206-002
$2,029.50
Picture of UPPER COVER

UPPER COVER

HYDROTHERM:75-00206-003
SKU: HYDROTHERM:75-00206-003
$1,955.25
Picture of UPPER COVER

UPPER COVER

HYDROTHERM:75-00206-004
SKU: HYDROTHERM:75-00206-004
$1,454.06
Picture of UPPER COVER

UPPER COVER

HYDROTHERM:75-00206-005
SKU: HYDROTHERM:75-00206-005
$1,189.24
Picture of UPPER COVER

UPPER COVER

HYDROTHERM:75-00206-006
SKU: HYDROTHERM:75-00206-006
$1,127.36