Richel Group offers a highly innovative, low-temperature condensing heating system.

The Kaléo boiler is economical, easy to install and highly energy-efficient heating system for horticulture. Highly compact and modular it can be installed either inside or outside the greenhouse. Made up of several stainless steel heat exchangers, each unit offers a wide range of loads and secures heat production. Combined with a low-temperature distribution network, the Kaléo boiler makes it possible to heat your crops efficiently at an affordable price.


• Controlled investment

• Low installation cost

• Equipment delivered ready to plug in

• No need to build a heating control room or a dedicated water tank

• Highly compact installation


• Stainless steel condensing boiler

• No acidification of the feed-water

• Closed, stable water loop

• Optimum energy efficiency (up to 108%)


• Several heat exchangers per module guarantee consistent heat production

• Possible to have the various heat exchangers operate in sequence, for enhanced modularity


• Compact frame installed in an insulated, waterproof casing made of galvanised metal • Stainless steel heat collector

• Distribution pump installed on the frame

• Natural gas or propane burner

• 2 m stainless steel flue (dia 200 mm)

• Control: Integrated regulation on the frame, can be controlled via the greenhouse’s climate control unit.
Temperature of heating water precisely controlled by the unit itself. Option of autonomous regulation

• Option of CO2 recovery (coming soon)

• Installation inside or outside the greenhouse

• Dimensions of the 250 kW module : L1485 mm x W1300 mm x H1340 mm

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