The most visionary heating and cooling systems in the world

Fenagy develops and manufactures refrigeration and heat pump systems based on the natural refrigerants CO₂ and hydrocarbons.

We always use natural refrigerants because they are efficient and have no harmful effects on the environment and climate - unlike all alternative synthetic refrigerants. Natural refrigerants are the refrigerants of the future, not just in Denmark.

Factory-built CO2 heat pump system for district heating and industry. Can be water-to-water or air-to-water heat pump.

HEAT PUMPS
Factory-built industrial refrigeration system installed on a rack. It's a CO2 chiller.

CHILLERS

Factory-built combined heat and cooling system on a rack. Suitable for large industrial buildings-.

COMBINED HEAT AND COOLING

HEAT PUMPS, CHILLERS & COMBINED

HEAT PUMPS, CHILLERS & COMBINED

Propane industrial chiller in enclosure. It can reach supply temperatures up to 75°C.

CHILLERS, HEAT PUMPS & COMBINED

Customer testimonials

“Has the heat pump been achieving the promised efficiencies?”

  • "After 8 months of operation, we have found that the heat pump solution from FENAGY outperforms expectations in all scenarios compared to what was promised during contract negotiations. This has been confirmed through performance verifications that have been carried out."

    Peter Vestereng
    TLV Utility Company

  • "We have achieved a satisfactory performance and COP value as promised."

    Thomas Suldrup and Per Friis
    Nykøbing Sjælland District Heating

  • "The promised efficiency has been demonstrated and achieved with a positive margin. The report is clear, and the results are well-documented, leaving no need for discussions or interpretation of conclusions or conditions."

    Jan Baunehøj
    Glamsbjerg Haarby Heating Plant

  • "Yes, absolutely. The guaranteed performance and COP are as promised. We have been operating the system for 15 months now and have experienced very few interruptions. We’ve also gained a significant additional benefit from the heat pump, as its extensive operating hours allow our remaining equipment to participate in the grid balancing market, generating extra revenue."

    Thorbjørn Madsen
    Vildbjerg Heating Plant

  • "The product has definitely lived up to its promised efficiency. In fact, it’s performing even better than expected. We were curious to see how it would perform during the winter, and so far, it’s holding up well. We’ve seen it run down to -6°C without issues."

    Simon Stampe Jensen
    Ikast Energi Utility Company

see selected cases

We only use natural refrigerants

Diagram showing temperature ranges of natural refrigerants CO2 (R744, Isobutane (R600a) and Propane (R290)
Green icon saying Natural Refrigerants ONLY.

R744 - CO₂

APPLICATIONS: District heating, heat networks, industrial processes, food industry, green houses, data centres, logistics centres, offices,
hospitals and HVAC in general

  • Natural refrigerant with a wide temperature range

  • Non-toxic and non-flammable

  • Excellent choice for air-sourced heat pumps for direct use in the energy collectors and with high delta T on the heat sink side

  • Optimal for medium-temperature water-sourced heat pumps, chillers and combined heating and cooling applications

  • Medium-high temperature level on heat sink (up to 85°C supply temp) with high delta T on the heat sink (dT: 30-40K)

R600a - Isobutane

APPLICATIONS: Heat networks, Biogas, PtX, geothermal, carbon capture, CO₂ heat pump sub-cooler, industrial processes and food industry 

  • High-temperature natural refrigerant

  • Suitable for water-sourced heat pumps and chillers

  • Can be used in a wide temperature range on both the heat source and heat sink sides

  • Robust operation under various operating conditions

  • Use of efficient screw compressors and high COP of the cycle

  • High temperature level on heat source (up to 40°C evap. temp)

  • High temperature level on heat sink (up to 95°C supply temp) and ideal with low delta T on heat sink - serial coupling on water side at higher delta T

R290 - Propane

APPLICATIONS: Heat networks, industrial processes, food industry, data centres, offices, hospitals and HVAC in general

  • Low-temperature natural refrigerant

  • Suitable for lower temperature water-sourced heat pumps and chillers

  • Low temperature level on heat source (down to -30 °C evap. temp)

  • Medium temperature level on heat sink (up to 75 °C supply temp)

  • Ideal with low delta T on sink and heat source

  • High refrigeration capacity ensures compact solutions with small footprint

  • Can be combined with isobutane in serial hydraulic couplings