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 Hot Water Heating Coils

Hubbell Model Coils

Immersion Heat Transfer Coils
U tube type
Range of Materials

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 Hot Water Heating Coils


Hubbell hot water heating coils are designed to efficiently transfer heat from a steam, boiler water, solar water or high temperature hot water (HTHW) system to the domestic potable hot water system. The primary heat source (steam, boiler water, solar water or HTHW) travels through the tubing in the Hubbell heating coil and transfers heat to the secondary system (potable water) without allowing either system to come into direct contact with the other. Hubbell heating coils are designed and constructed for maximum efficiency and longevity and additional features are readily available to provide the most appropriate style and material of construction for virtually any application.

When you specify and install a Hubbell water heating coil, you will have confidence in knowing the owner will be provided with a trouble-free and long lasting source for hot water.


High quality Construction
  • Each tube bundle is constructed according to ASME requirements to ensure the highest performance in even the most demanding application
Wide Selection
  • Available in a full range of styles and sizes to meet the specific requirements of any commercial or industrial application
  • Hubbell heating coils utilize Steam, Boiler Water, Solar Water or High Temperature Hot Water (HTHW) to heat potable water

Heating Coils Tube Standard Specifications

Size O.D3/4"
Gauge18 BWG
Design WP150 psi
Design TP225 psi
Design Temp350°F
Head ConstructionFabricated Carboon Steel to ANSI B16.5 Class 150
Tube Sheet MaterialNon Ferrous (domestic side)
Tube Sheet StyleBetween Bolt Design
Fouling Factor0.00025
Tube SpacerResin impregnated compsoite
GasketNon Asbestos
Warranty1 Year


Heating Coils for Hot Water Heaters


Optional Equipment
  • Tube Guage
    • 20 BWG
  • Tube O.D
    • 1 1/4" (typically used in long tube bundles with high capacity recovery ratings and lower steam pressure)
    • 1/2" O.D. Tube
  • Tube Materials
    • 90/10 Copper-Nickel, Type 304 or 316L Stainless Steel, Carbon Steel
  • Tube Sheets
    • 90/10 Copper-Nickel, Stainless Steel
  • Head
    • Fabricated Carbon Steel with Copper Coating, Fabricated Stainless Steel (304 or 316L)
  • Tube Sheet Style
    • Full face tube sheet
  • Construction
    • ASME stamped and certified
    • ANSI class 300 flanged construction
    • Built in accordance to TEMA Standards
  • Fouling Factor
    • Specify as required
  • Supports
    • Typically installed if tubes are over 30" in length
  • Baffle System
    • Used in shell and tube type heat exchangers, not required in storage tank heaters unless the heating coil is a "wrapped and baffle" design utilizing a pump for forced circulation over the coil


The heater manufacturer shall warranty the heating coils against defects in workmanship and material for a period of one (1) year from date of start-up, provided that the coils are used within three (3) months of date of shipment and installed and operated within the scope of the coil design and operating capability.

Technical Support

Our Technical Support Reps are ready to assist you. Please contact us today.


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