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Hot Water Coils

Hot water coils are tube-fin heat exchangers consisting of rows of tubes that pass through sheets of formed fins, bonded through tube expansion. Our water coils come with various tube, fin and material options. As the cold air passes across the coil and contacts the hot fin surface, heat transfers from the hot water flowing through the tubes to the cold air entering the coil allowing the heat transfer to occur. Nationwide Coils, Inc. can provide you with the perfect heat transfer solution for your hot water coil needs.

To find out more about Hot Water Coils please visit our product site at www.hotwatercoils.com.

Materials of Construction and Sizing:

Tube Size – Hot Water Coils as a standard are either 1/2″ .016″ or .020″ copper tube wall thickness or 5/8″ tubing either .020″, .025″, .035″ or .049″ copper tube wall thickness.

 Fin Thickness – Standard Hot Water Coils have options of .006″, .008″, and .010″ fin thicknesses. Casing Material – Most Water Coils as a Standard are 16 Ga. galvanized metal casing with options for stainless steel casing.

 Header sizes – The headers for a Hot Water Coil can range from .5″ to 4″

Tube Size/Fin Height/Fin Length – The tubes sizes are critical to confirming the fin height of a Chilled Water Coil or Hot Water Coil. 1/2″ tubes run on 1.25″ centers as an example – 20 – 1/2″ tubes running vertically would have a fin height of 25″. The same concept is true for 5/8″ copper tubes except they are running on 1.5″ centers as an example – 20 – 5/8″ tubes vertically would have a fin height of 30″.

Header Size – Duplicating the header and connection sizes is critical to ensuring that the proper GPM is allowed to flow through the coil at the correct fluid velocity and water pressure drop. Failing to properly do this can cause premature pitting of the copper tube and failure of the coil/pumps.

Certification – Acceptable coils are to have ARI Standard 410 certification and bear the ARI symbol. Non-certified coils or coils outside ARI’s rating range will be considered if the manufacturer is a current member of the ARI air-cooling and air-heating coils certification program and the coils have been rated in accordance with ARI Standard 410.

Acceptable coils are to be Intertek Recognized Components, and are eligible to bear the ETL Listed Mark.

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  • Tube Materials
    • Copper
    • Stainless Steel
    • Cupro-Nickel
  • Sizes
    • 3/8"
    • 1/2"
    • 5/8"
  • Wall Thickness
    • 3/8" & 1/2" Tube - 0.016, 0.020
    • 5/8" Tube - 0.020, 0.025, 0.035, 0.049
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  • Specifications:
    • 3/8" Tube - 10-20 fpi
    • 1/2" Tube - 6-16 fpi
    • 5/8" Tube - 6-14 fpi
  • Fin Thickness
    • 0.006
    • 0.008
    • 0.010
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  • Copper
  • Stainless Steel
  • Cupro-Nickel
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  • Galvanized Steel
  • Stainless Steel