Email Address:

Steam Coils and Steam Air Heaters

Steam Coils

Steam Coils are used in both industrial and HVAC applications. Finned tubes are almost always used in steam coil applications. A steam coil is used to heat air when steam is available. This type of coil makes use of the latent heat that is released by the steam when it condenses so it is a very effective way of heating air.  

Our steam coils are made with heavy walled copper tubes and headers, and are available with a variety of connection locations and casing options to meet any mounting configuration. The Standard Steam coil are suitable for wide range of heating applications such as preheat, boosters, reheat, duct heaters, process air & gas and many more.

For replacement steam coils or those needing to fit specific dimensions, our wide range of coil and tube sizes, fin spacing, and coil connection types allow for a drop-in coil fit. We can match existing size and performance of coils. If you know your performance requirements, you can contact us by requesting a quote.

Steam Coils and Steam Air Heaters

Coil Types

Coil Type Other Names Description
Straight Tube
  • Blast Coil
  • Type S Coil
  • Type MP Coil
  • Straight tubes
  • One or two row
  • One Pass
  • Opposite end connections
U-Tube coil
  • Type H Coil
  • Type CH Coil
  • Hairpin Coil
  • Type LRB Coil
  • Two row coil with tubes formed in a U shape
  • Two Pass
  • Same end connections
Non-freeze Coil
  • Type DT Coil
  • Type ANF Coil
  • Type BNF Coil
  • Distributor Tube Coil
  • Straight Tubes
  • Inner distributing tube to feed steam
  • One or two row
  • Two Pass
  • Same end connections
  • Incoming steam heats condensate leaving coil to reduce the risk of freezing
Flex Coil
  • Uniflex Coil
  • Fexitube Coil
  • Tube have an off-setting bend to allow for thermal expansion
  • One or two Row
  • One Pass
  • Opposite end connections
PFR Coil
  • Tandem Coil
  • “Purge First Row” Coil
  • The ultimate in freeze protection – designed for applications with very cold inlet air
  • Two Row
  • Vertical tubes
  • Opposite end connections

Click here to see how a Standard Steam coil works

Click here to see how a Non-freeze (Distributor Tube Type) Steam coil works


TUBE MATERIALS: Cooper, 90/10 Copper/Nickel, Carbon Steel, Stainless Steel, high alloy steels.

FIN MATERIALS: Aluminum, Copper, Carbon Steel, Stainless Steel, various coatings.

FIN TYPES: Plate Fin, Extruded Fin, Solder Coated, Applied, Weld-on.  Click Here for a Comparison of Fin Types.

Tubes can be welded or brazed to the header.

Design Codes: ASME, CRN, N-Stamped.

For a guide to Steam Coil Nomenclature and Terminology, click here.

For Information Required to Size or Replace a Steam Coil, click here.

For a Guide to Measuring a Coil, click here.

To determine Coil Handing, click here.

Click here for information on condensate handling and preventing steam coil failures.

Steam Air Heaters

A Steam Air Heater (also referred to as Steam Coil Air Heaters) consists of a frame which houses one or more steam coils. The frame is installed in ducting and each steam coil is individually removable from the frame so that they can be cleaned, repaired, or replaced without disturbing the ducting. A Steam Air Heater is usually applied in applications where there is a large heat load and multiple steam coils are required to meet the duty. In applications with a large heat load, a bank of several steam coils is often a better solution than one large steam coil because large steam coils are susceptible to performance problems due uneven steam distribution and they are difficult to handle during installation and removal. Any combination of the steam coils listed above can be use in a steam air heater. 

Applications for Steam Coils:

  • Boiler Air Preheating
  • Pulp Dryers
  • Paper Machine Ventilator Coils
  • Make-up Air Units
  • Freeze protection for Air Cooled Heat Exchangers
  • Air Tempering applications
  • Unit Heaters
  • Boiler Air Preheater
  • Recovery Boiler
  • Power Boiler
  • Flue Gas Reheater 
  • Dryer
  • Space Heaters
  • Other Dryer applications


Request More Information