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Salt Water Pool Heaters

M-Line Marine Alloy Heat Exchangers

Shell and Straight Tube Heat Exchanger

M-Line heat exchangers are a line of completely welded heat exchangers made entirely of a super austenitic marine alloy. Its compact structure is an integration of innovative material with detailed engineering for effective use with high fluid velocities and low pressure drops, designed specifically for salt water pool applications.

The versatility of this robust straight tube design covers a comprehensive range of capacities, suitable for all residential and commercial pool applications.

Explore all Shell and Tube Heat Exchangers
Two AIC M-Line marine grade shell and tube heat exchangers
M-Line logo

Features and Benefits

True to form, the M-Line is a marriage of resistances: superior corrosion resistance with high erosion corrosion resistance, highly valued for its use in seawater and salt water environments.

  • Superior corrosion resistance provides protection for salt water and other marine applications.
  • High erosion corrosion resistance suitable for applications with high fluid velocities.
  • High material strength for quality performance and long product life.
  • Low pressure drops

Heat exchangers that are efficient in nature, compact in design, and pioneering at heart.

  • Heat exchanger tube with colour gradient showing heat transfer in a pool heating line

    • Specifications

    • Technical

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    Unrivaled In Its Perfection Uncompromising Quality

  • Maximum Working Parameters

    Pressure

    • Up to 150 PSI (1.03 MPa)

    Temperature

    • Up to 406°F (208°C)

    Standard Materials

    • Nicrom 24 (super austenitic alloy)

  • Applications

    • Salt water pools, spas, hot tubs
    • Transmission and engine coolers
    • Marine Oil coolers
    • Boiler sample coolers
    • Waste water heat recovery

    • M-Line Technical Product Specifications

    Technical drawing of an AIC B-Line heat exchanger with dimensionsAIC M-Line heat exchanger sizes M-100, M-300 and M-500 with dimensions
    Hot Water Side (Tubes) Cold Water Side (Shell)
    Nominal Capacity Flow Pressure Drop Flow Pressure Drop
    Model kW Btu/Hr l/min USGPM kPa PSI l/min USGPM kPa PSI
    M-180 53 180,000 100 26.4 7.0 1.0 150 39.6 8.7 1.3
    M-300 88 300,000 105 27.7 8.2 1.2 157 46.6 8.6 1.3
    M-500 146 500,000 120 31.7 11.4 1.7 180 47.6 11.8 1.7
    Nominal values are based on heating water 180°F (82.2°C ) and return pool water 80°F (26.7°C )
    Dimensions Connections Heat Transfer Area
    L A B C Ø D F G
    Model mm in mm in mm in mm in mm in Shell Tubes ㎡ sq ft
    M-180 402.1 15.8 160.0 6.3 193.0 7.6 104.6 4.1 103.6 4.1 1 1/2" 1" 0.44 4.70
    M-300 651.1 25.6 160.0 6.3 442.0 17.4 104.6 4.1 103.6 4.1 1 1/2" 1" 0.84 9.00
    M-500 1104.1 43.5 160.0 6.3 895.0 35.2 104.6 4.1 103.6 4.1 1 1/2" 1" 1.56 16.80

    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.

    Experience an AIC Pool Product 

    Combine engineering ingenuity with nature’s vitality, and yield a resilient, super austenitic marine alloy product series that has continuously demonstrated its superior performance and strength over other commercially marketed marine alloys. 

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    AIC M-Line marine grade heat exchanger with labelled parts and a tube bundle close-up

    M-Line Construction

    1. Complete Nicrom-24
    2. Directional baffles
    3. Heating source on the tube side
    4. Pool water on the shell side
    5. Specialized 8mm corrugated tubing
    6. Vertical or horizontal installation
    7. Fully passivated