Energy Blades

Energy Blades

Energy Blades are an ideal way to implement a water-based heat collector for use with ground source heat pumps.

Energy Blades are stainless steel, water-submersible heat exchangers designed to be used in fresh water. Each Energy Blade is made up of a pre-assembled bank of four plates with an integral manifold. Multiple banks of four can be connected to increase the capacity.

They maximise the energy extraction rate from the smallest possible footprint and are ideally suited to situations in flowing water where a set of slinky pipes would not be practical. However, they are equally well-suited for use in lakes and still water. Among the advantages they have over slinkies is that they are quicker and easier to install, flush and fill, and contain less glycol than the equivalent length of slinky pipe.

Energy Blades can be located on the bed of the lake, pond or river with the blades vertical and the manifold at the top or, alternatively, the units can be slung under a supporting structure such as a jetty provided it is made of steel, wood or any other material that will not cause corrosion of the plates. Hangers from the supporting structure can be bolted to the edge of the plates.

An Energy Blade is a water-source heat exchanger designed for use in flowing or static water. This innovation is the ideal method for extracting heat from water for use with a heat pump, maximising the energy extraction rate from the smallest possible footprint.

Features Blades are made up in a pre-assembled bank of four plates with an integral manifold:

  • Each blade is approximately 3000mm x 500mm
  • The size of the four blade set is approximately 3000mm x 500mm x 800mm
  • Multiple banks of four can be connected to provide increased capacities
  • The liquid content in each Blade is approximately 5l. With the manifolds included, the volume of each bank of four Blades is approximately 35l (9l of concentrated glycol)
  • Energy Blades, and all components in the banks of four blades, are manufactured in ST/STL 304-2B stainless steel
  • Energy Blades can be compared to the more traditional submerged coiled MDPE “slinky” collectors. Slinkies are not suitable for use in running water and contain more glycol than an equivalent array of Energy Blades


Item Specification
Blade size 3000mm x 492mm
Array width 785 mm
Approximate array volume 35l
Array Height 604 mm
Manifold fittings 1 ½” Male BSP
Air vent fittings 3/8” Female BSP
Material Stainless steel 304-2B
Empty weight 85 kg (approx.)
Nominal flow rate 1.2 l/s
Pressure loss at design flow 25kPa (25% propylene glycol)
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