Information Database
For answers to commonly asked questions including comparison of competitive units and questions about referencing an existing specification visit our Frequently Asked Questions and Boiler Economizer Specification Compliance Information page.

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HeatSponge High Performance Boiler Economizers

Soak Up Wasted Energy With A HeatSponge Economizer

HeatSponge Model Number Identification

All HeatSponge economizers use a common system for model identification. This system is as follows:


The common identification is:
HS - {model-enhancer} - {model} -{no of tube circuits} - {base or special unit + identifier if special/fin count/tube & fin material/casing material}

  • HS - HeatSponge Economizer
  • {model enhancer} - only used for unique enhanced models
    - CND - Specifies unit shall be an external full condensing design
    - STK - Stacked economizers
    - 2STG - Two-stage economizers for heating two seperate water streams
  • {model} - identifies the model type
    - SHORTY - An inexpensive coiled tube economizer for boilers under 300 HP
    - BOSS - This model represents the lowest priced economizer for a specific boiler
    - MAGBUM - A midrange unit designed to fit into the middle of the BOSS and SUPER range
    - SUPER - This model represents a higher priced but high energy recovery economizer for a specific boiler
    - TITAN - This is the largest HeatSponge made for industrial watertube and other very large boilers
  • {no of tube circuits} - number of tube circuits in a unit (this is the number of tube elements in a unit for all models except Titan which has two elements per circuit)
  • {base or special unit} - indicates if the unit is a basic unit or if special modifications were required
    - B represents a normal HeatSponge
    - S is a flag to indicate the unit was modified from a basic unit
    -- if a number comes after ans S that signifies the casing size if a stretched casing is required
  • {fin count} - fin count in fins per inch
    - 5 fins/inch for gas only of gas with #2 oil standby only
    - 4 fins/inch for #2 fuel oil only firing boilers
    - 3 fins/inch for #6 oil firing
  • {tube & fin material} - identifies tube and fin metallurgy
    - C represents a carbon steel tube and fin
    - S represents a 300 stainless steel tube and 400 stainless steel fin
    - D represents a duplex stainless steel tube and 400 stainless steel fin
  • {casing material} - identifies the casing metallurgy
    - X the default on the AutoPick software since casing material is an optional item - C represents a carbon steel casing
    - S represents a stainless steel casing

Use a model HS-SUPER-12-[B5CC] for one example:

  • HS - HeatSponge Economizer
  • SUPER - identifies the unit model
  • 5 - number of tube circuits in a unit
  • B - basic unit - no specal modifications
  • 5 - five fins per inch fin count
  • C - Carbon steel tube and fin combination (stainless tube and fin would be an S)
  • C - Carbon steel casing

Use a model HS-CND-BOSS-9-[S12-4DS] for another example:

  • HS - HeatSponge Economizer
  • CND - Full condensing model
  • BOSS - identifies the unit model
  • 9 - number of tube circuits in a unit
  • S - special unit - strectched casing size
  • 12 - equivalent casing width to be utilized
  • 4 - four fins per inch fin count
  • D - Duplex stainless steel tube with stainless steel fins
  • S - Stainless steel casing


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