Water heater exchangers slide1



What are heat exchangers?

  • Devices specifically designed for the efficient transfer of heat from one fluid to another over a solid surface. This transfer of heat can either take the form of absorption or dissipation of heat. Heat exchangers can be found in everyday equipment from boilers, furnaces, refrigerators to air conditioning systems and swimming pools.

Which applications can heat exchangers be used in?

  • As a heat transfer device, it is the function of a heat exchanger to transfer heat as efficiently as possible. This makes it the ultimate device of choice, for instance, when it comes to saving energy by recovering wasted heat and making it useful again. When there is a waste of energy or a heat stream that is not recovered, a heat exchanger can convert that heat stream into something that we can use.
Industrial applications may include but are not limited to:

  • oil coolers
  • transmission and engine coolers
  • boiler coolers
  • waste water heat recovery
  • chilled water systems
  • ground water systems
  • condensers and evaporators in refrigeration systems
  • close approach fluid-to-fluid heat transfer
Residential applications may include but are not limited to:

  • radiant floor heating
  • pool heaters
  • snow and ice melting
  • domestic hot water
  • central, solar and geothermal heating

I have a pool heater, can I use a heat exchanger with it?

  • It depends on what kind of pool heater you have. It is not possible to use a heat exchanger with a direct fired pool heater. Pool heat exchangers require a boiler with temperatures ranging from 140F to 180F.
  • However, heat exchangers can be used for effective heat transfer with geothermal heat pumps. Geothermal heat pumps provide warm water in the 100F to 120F range, and our CN-XL series are some of the best in the market to provide high efficiency heat transfer while handling very large pool water flow rates with minimal head loss. Contact us for more information and to book a sizing consultation.

What is indirect heating and what do I do if I want to switch my direct fired heater to indirect heating?



  • In order to switch to indirect or hydronic heating, you will need the right equipment. First, purchase a hot water boiler if you do not have one already, and then ensure you have the correctly sized heat exchanger and control system installed. The heat exchanger works by connecting the boiler to the pool and uses the water heated by the boiler (between 140F to 180F) to heat the pool. Hence, the process is known as ‘indirect’ heating. Benefits of indirect heating are that you are using the same energy for two different applications, amounting to savings on your energy bill. Read more about swimming pool heating using heat exchangers.

I have a salt water pool, can I use a stainless steel heat exchanger?

  • Salt water produces electrical currents which would pit the stainless steel, and create pinholes or corrosion. We recommend using either of our corrosion-resistant cupro-nickel or titanium heat exchangers to heat salt water pools.

Should I use a cupro-nickel heat exchanger or titanium heat exchanger to heat my salt water pool?

  • Either of the two may be used. While the titanium is totally resistant to corrosion, with cupro-nickel you would need to maintain the pool to certain pH levels to minimize wear.

What is the difference between a cupro-nickel and titanium heat exchanger?

  • Other than the physical composition, there is no major difference. Both are corrosion-resistant units and can be used in either salt water or chlorinated pools.

Is indirect heating slower?

  • Not necessarily. How quickly a pool is heated depends on the size of pool, capacity of the boiler, capacity of the heat exchanger and amount of heat loss. As long as your heat exchanger is appropriately sized, there should be no delay in heating. Contact us for a sizing consultation.