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Steam Coil

Top quality steam coils built to your exact specifications for new equipment or replacement in commercial and industrial applications.

  • How it Works
  • How to Measure
  • Components Explained
  • Blank Drawings
  • Common Brands
  • Shipping
  • Top Selling

How Steam Coils Work

Steam coils are a common heat source in an air handler to provide heating for many commercial and industrial buildings. The supplied air from the fans is warmed by moving across aluminum, stainless or copper fins. The fins are warm from the exchanged heat of the steam going through the tubes. You may also see steam coils in rooftop units or ductwork.

Most steam coils we see use low pressure steam around 5 to 15 PSI. We do sell steam coils for applications that use much higher steam pressure that are typically for process heating in a factory. In this case it’s common to see stainless steel tubes used which can withstand the high pressures and temperatures.

How to Measure a Steam Coil:


Steam Coil Components Explained

Steam coils are very simple but it’s still important to know the parts when ordering. It’s also very important to know the amount of steam pressure being used. You should always let your rep know when ordering to avoid having an underrated coil. Too high of steam pressure and you will see the life of your coil reduce dramatically. Steam coils are still able to freeze if temperatures are cold enough or condensation is in the tube without the unit running. We never recommend patching leaks in the middle of a coil. You will lose a great deal of efficiency from it and risk future leaks.

There are plenty of options in materials to use when designing your replacement steam coil. It may not make sense to redesign the coil to the exact specs as the previous coils. You may need more fins for better capacity. Or you may want less fins for ease of cleaning. Below are material options you may consider.

Tubes Material Options:

  • Copper / Most common and offers best heat transfer
  • Stainless / Often used for high pressure and high heat applications. Comes 304 or 316 SS
  • Steel / Common for high steam application
  • 3/8, 1/2, and 5/8 are available. Although 5/8 inch tube diameter is the most common selection for chilled water coil because it offers many wall thickness options which can increase the lifespan before tube erosion becomes a problem

Fin Material Options:

  • Aluminum / Most common and cheapest options
  • Copper / Often used in corrosive environments
  • Stainless / Also used in corrosive or food grade environments
  • Connections Materials and Types
  • Copper, Brass, Steel, Stainless
  • Female Thread, Male Thread, Sweat ODS
  • Size range ½” to 4”

Casing Material:

  • Aluminum / Cheapest and most common
  • Copper / Common in corrosive environments
  • Stainless / Common in corrosive or food grade environments

Blank Drawings


Common Brands We Replace

  • Carrier
  • Heatcraft
  • Leenox
  • Mcquay
  • Trane
  • York
  • Aaon

Shipping Options for Chilled Water Coil

Piggy Bank
Free shipping on most steam coils!
Piggy Bank
Most coils ship in 2 to 3 weeks but many customers use our expedited options. Contact your rep for current options.

Top Selling Steam Coils

See More In-Stock Chilled Water Coils

Top Steam Coil Blog Posts

Selecting chilled water coils and hot water coils for an industrial plant

Selecting chilled water coils and hot water coils for an industrial plant

As I mentioned before, one way to protect coils from corrosion-causing materials is to apply coatings. Selecting the right materials for chilled wa...