Heat Recovery E-Line Heat Exchangers

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 principal the E-Line economizers act as air to water heat exchanger. Flu 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 flu gas to process fluids flowing through the tubes.

AIC B-Line Heat Exchanger Cut-out

  • Boiler pre-heater
  • Domestic hot water
  • Hydronic heating
  • Suplemental energy source

Standard Materials

  • Stainless Steel 304/316L

Standard Working Pressure:

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

Standard Working Temperature:

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

E-Line Performance

The E-line tubes are uniquely "tear-drop" shaped - A design that guarantees maximum heat transfer surface contact with the flu gas, while decreasing the creation of flow wakes. The tubes are strategically positioned in a matrix to optimize the thermodynamic process, by inducing gas turbulance and increasing the heat transfer rate, and minimizing overall gas pressure drops through the system. The stainless steel durable construction is designed to withstand the corrosive effects of condensing flu gases, and is insulated to minimize heat losses.


*Connections for stainless steel models only

E-Line Typical Installation

AIC B-Line Heat EXchanger Sample Application


By essentially converting standard boilers into condensing boilers, the E-Line can increase the existing boiler efficiency by up to 10%.

  • Creates real energy and cost savings
  • Converts standard boilers into condensing boilers
  • Increases existing boiler efficiency by up to 10%
  • Covers between 150 to 2000 kW boiler systems
  • Unique tube design for optimal thermal performance
  • Durable stainless steel design
  • Easy installation and maintenance


ASME Certification

UL Listing Certified Heat Exchangers
ISO 9000

CE Certified