GM Heat Exchangers

GM Heat Exchangers
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Product Information

GM Heat Exchangers

By utilising a heat exchanger you can create the most economical and efficient way to heat a Koi pond.  Linked to a boiler, the heat is transferred to the pond via the heat exchanger. The final selection of a heat exchanger should be ascertained by pond capacity, boiler output, heat retention properties and positioning of equipment.

The output specification of the heat exchanger is the maximum that may be reasonably expected the unit to produce, so it is therefore highly recommended to upgrade to the next output size if in any doubt.

It is important that the correct rated boiler is used for the size and gallonage of the pond and that the flow rates are not exceeded. The maximum flow rates for the primary and secondary circuits are stated on the label fixed on the front of the boiler along with the relevant rating of that specific heat exchanger.

G M Heat Exchangers are manufactured from quality marine grade Type 316 stainless steel,

Each unit undergoes 12 stringent tests during quality control production.

Each unit is tested to 70 p.s.i before leaving the factory and each one is guaranteed for a full 12 months from purchase date, subject to essential conditions are strictly followed during the installation and working life.

All units must be installed vertically. Care must be taken to insure that no chemical residue can enter the heat exchanger when the system is not running. It is recommended to maintain a constant pH between 7.2 – 7.6 to prevent excessive scaling deposits and corrosion.

The secondary flow, which is the heated flow to the pond(usually after filtration), is then connected to the top right and the flow though which transfers the heated water to the pool will be situated at the lower left outlet. All threaded connections are BSP thread.

It is paramount that the unit is installed in an upright position; with the primary and flow connections from the boiler set top and bottom.

BTUs Max Pond Size Max gph Coils
60,000 3,000 gallons 900 Single Coiled
100,000 5,000 gallons 1,440 Single Coiled
130,000 6,500 gallons 1,860 Single Coiled
170,000 8,500 gallons 2,460 Single Coiled
230,000 11,500 gallons 3,300 Single Coiled
460,000 23,000 gallons 8,580 Double Coiled


Price does not include P&P

Product Code CNHE0011
Stock Level 2

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