DHT - Designers & Manufacturers of Heat Transfer Equipment

DHT Products > Heating & Cooling Coils > Water Coils

Hot Water Coils, Chilled Water Coils & Water Coil Heat Exchangers

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Water Coils
Steam Coils
Condenser Coils
Tube Bundles
Wholesale Only
Water Coil

Water Coils, Chilled Water Coil, Hot Water Coils & Glycol Coils

Replacement and OEM coils for Chilled Water Coils, Hot Water Coils and Glycol Coils.

Primary Surface

Round seamless copper tubes are mechanically expanded into the fin collars of the secondary surface. The mechanical expansion provides a permanent metal-to-metal bond for efficient heat transfer. Tubes are staggered in the direction of airflow.


Seamless copper with die-formed holes that provide a parallel surface to the coil tube for strong brazing joints. Standard 1/8" brass female pipe thread (FPT) vent and drain with optional (1/4) and (3/8). All circuiting is designed to gravity-drain with the coil mounted vertically and tubes running horizontally.


Red Brass Schedule 40 (MPT) is standard with optional Carbon Steel, Copper, Copper Nickel and Stainless Steel available. Options for FPT also available.


Using 16-gauge minimum thickness material, flanges are die-formed to permit easy stacking and mounting. Intermediate tube supports are supplied on coils over 44" fin length with an additional support every 42" multiple thereafter.

Casing Material Options:

Galvanized steel standard with optional stainless, aluminum and copper.

Testing & Performance

All coil assemblies are leak tested under water at 315 PSIG air. Standard construction is suitable for 250 PSIG and up to 300 degrees F.


Tube Size Options:

Secondary Surface

Corrugated plate type fin that is die-formed. Fin collars are full-drawn to provide accurate control of fin spacing and maximum contact with tubes.

Fin Material Options:

Also Available:

Intermediate headers for full "drainability".

Contact us for availability of other patterns, fin materials and/or thicknesses.