AIC
AIC Heat Exchangers

M-Line Marine Alloy Heat Exchangers

Salt Water Pool Heaters – 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.

Specifications Brochure Video
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Typical applications include

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

Standard Materials

  • Nicrom 24 (super austenitic alloy)

Maximum Working Pressure

  • Up to 150 PSI (1.03 MPa)

Maximum Working Temperature

  • Up to 406 °F (208°C)
M-Line Heat Exchangers
M-Line Heat Exchangers
Experience an AIC Pool Product: heat exchangers that are efficient in nature, compact in design, and pioneering at heart.

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. 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.

Distinct Advantages

  • 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.

Typical Swimming Pool Installation

  1. Boiler
  2. Heat Exchanger
  3. Swimming Pool
  4. Pump
  5. Filtration
  6. Chlorine Feeder
  7. Circulation Pump
  8. Flow Control Valve
  9. Gate Valve
  10. Check Valve
  11. Thermometer
  12. Safety Relief Valve
Pool Heat Exchangers

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.

M-Line Technical Product Specifications

Heat Exchanger Model Nominal Capacity Hot Water Side (Tubes) Cold Water Side (Shell)
Flow Pressure Drop Flow Pressure Drop
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 )
Heat Exchanger Model Dimensions Connections Heat Transfer Area
L A B C Ø D F G
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