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Economizers

E-Line Economizers

Air to Water Heat Exchangers

AICs standard line of E-Line economizers is the optimal solution for boiler flue gas heat recovery.

Covering a wide range of boiler sizes, the E-Line delivers real energy and cost savings for commercial and industrial installations. In principle the E-Line economizers act as air to water heat exchangers. Flue gas, typically considered wasted heat, can be effectively cooled down and condensed through the AIC system. This cooling and condensing process releases and transfers excess energy from the flue gas to process fluids flowing through the tubes.

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AIC E-Line condensing economizer for boiler flue gas heat recovery

Stainless steel secondary heat exchangers of various design patterns for different heat recovery systems in commercial and industrial applications.

E-Line logo

Features and Benefits

Typically used with hot water boilers or configured with older type of heating boilers, condensing economizers improve the overall heat recovery system and boost boiler efficiencies.

  • Increased system efficiency
  • Real energy and cost savings
  • Converts standard boilers into condensing boilers
  • Increases existing boiler efficiency by up to 20%
  • Unique tube design for optimal thermal performance
  • Easy installation, low maintenance
AIC E-Line condensing economizers in several sizes

  • Specifications

  • Technical

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High Efficiency Condensing Economizers Improve Heat Recovery & Boost Performance

  • Maximum Working Parameters

    Pressure

    • Up to 160 PSI (12 bar) in Tubes (Liquid Side)

    Temperature

    • Up to 375°F (190°C) Tube Side (Liquid Side)

    Standard Materials

    • Stainless Steel 304/316L

  • Applications

    • District heating systems
    • Greenhouses
    • Food processing plants
    • Pulp and paper mills
    • Textile plants
    • Dairy processing facilities
    • Hospitals
    • Plume abatement

    • E-Line Economizers Technical Product Specifications

    Connection Dimensions
    Model Nominal Boiler Input Exhaust Inlet Exhaust Outlet Water Inlet Water Outlet Drain Nozzle
    kW MBTUH ømm øin ømm øin mm in mm in mm in
    E 8.1 150-250 500-850 200 8 200 8 DN65 2-1/2 DN65 2-1/2 DN20 3/4
    E 12.1 200-500 650-1700 300 12 300 12 DN65 2-1/2 DN65 2-1/2 DN20 3/4
    E 15.1 450-1200 1500-4100 400 16 400 16 DN100 4 DN100 4 DN20 3/4
    E 16.1 1100-1500 3750-5100 400 16 400 16 DN125 5 DN125 5 DN20 3/4
    E 20.1 1400-2000 4800-6850 500 20 500 20 DN150 6 DN150 6 DN20 3/4
    E 28.1 3000-4000 10240-13650 700 28 700 28 DN150 6 DN150 6 DN50 2
    E 35.1 4500-6000 13650-20475 900 35 700 28 DN150 6 DN150 6 DN50 2
    Larger sizes (multiple-units) or custom-designed economizers available upon individual request.
    Dimensions
    Model A B C
    mm in mm in mm in
    E 8.1 1212 47.72 1010 39.76 506 19.92
    E 12.1 1312 51.65 1017 40.04 677 26.65
    E 15.1 1562 61.50 1304 51.34 875 34.45
    E 16.1 1591 62.64 1339 52.72 897 35.31
    E 20.1 2040 80.31 1765 69.49 1082 42.60
    E 28.1 2070 81.50 2041 80.35 1734 68.27
    E 35.1 2249 88.54 2321 91.38 1730 68.11

    The product information and literature on this website are intended as a guideline for general purposes only. Models, dimensions, and operational parameters are subject to change at AIC's discretion. Contact AIC directly for updated design specifications.

    Technical drawings of an AIC E-Line economizer with dimensions
    Cutaway of an AIC E-Line economizer showing flue gas flow through the heat exchanger

    E-Line Cross-section: Hot flue gases enter the economizer (between the tubes), gases cool down, condense and release latent heat captured by the water (inside the tubes).

    Performance that matters

    In the boiler room eLINE economizers transfer their waste heat to either the feed water or combustion air pre-heaters, essentially converting standard boilers into condensing boilers.

    AIC’s is unique “tear-drop” tube design provides maximum heat transfer surface contact with the flue gas. Economizer tubes are strategically positioned to optimize the thermodynamics process and allow for improved recovery of wasted energy. Installation of condensing economizers can help companies improve overall heat recovery and steam system efficiency by up to 20% (in standard applications).

    Tube Designs

    Close-ups of finned tubes used in AIC E-Line economizers

    AIC’s offers a range of designs:  e-Line (Tear-Drop), Fire-Tube, and F Line.

  • AIC E-Line economizer on a green background, video thumbnail