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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 50764PB DRAIN VALVE

50764PB DRAIN VALVE

HYDROTHERM:50764PB
SKU: HYDROTHERM:50764PB
$48.26
Picture of 50795 TARGET WALL

50795 TARGET WALL

HYDROTHERM:50795
SKU: HYDROTHERM:50795
$144.79
Picture of 50866 FLUE COLLECTOR BLANKET SEAL (PER FOOT SPECIFY LENGTH)

50866 FLUE COLLECTOR BLANKET SEAL (PER FOOT SPECIFY LENGTH)

HYDROTHERM:50866
SKU: HYDROTHERM:50866
$27.22
Picture of 50867 BASE BLANKET SEAL (PER FOOT SPECIFY LENGTH)

50867 BASE BLANKET SEAL (PER FOOT SPECIFY LENGTH)

HYDROTHERM:50867
SKU: HYDROTHERM:50867
$23.51
Picture of 50894 ORIFICE #48 (NG)

50894 ORIFICE #48 (NG)

HYDROTHERM:50894
SKU: HYDROTHERM:50894
$27.22
Picture of 50895 ORIFICE #49 (NG)

50895 ORIFICE #49 (NG)

HYDROTHERM:50895
SKU: HYDROTHERM:50895
$27.22
Picture of 50899 ORIFICE #56 (LP)

50899 ORIFICE #56 (LP)

HYDROTHERM:50899
SKU: HYDROTHERM:50899
$27.22
Picture of 50900 ORIFICE #57 (LP)

50900 ORIFICE #57 (LP)

HYDROTHERM:50900
SKU: HYDROTHERM:50900
$27.22
Picture of 50980 GAS MANIFOLD

50980 GAS MANIFOLD

HYDROTHERM:50980
SKU: HYDROTHERM:50980
$136.13
Picture of 50981 GAS MANIFOLD

50981 GAS MANIFOLD

HYDROTHERM:50981
SKU: HYDROTHERM:50981
$146.02