Public buildingsAdO Arena
Pool heating saving up to 750,000 kWh a year, running at full capacity through Bergen's coldest winter in 20 years.
Industry
Statkraft, Meråker
Meråker Grønt AS has grown cucumbers year-round in Meråker since 2007, producing around 6 million cucumbers a year for customers including Coop. In 2024 to 2025 it invested roughly NOK 20 million in a new energy system built around three Tequs Aqua4 CO₂ heat pumps, delivered on an Energy-as-a-Service model with Statkraft, Norway's first zero-emission energy plant for greenhouses.
- Meråker, Norway
- Location
- 3 × 130 kW (Aqua4)
- Installed Capacity
- 4.8
- Field COP
- ~750 t/yr
- CO₂ Avoided
At Meråker Grønt AS, we chose Tequs because of the high flexibility in operating mode, temperature and capacity regulation. The CO₂-based system gives us energy-efficient operation with near-zero climate impact, a robust and future-proof solution for year-round greenhouse production.
Technical solution
ParameterDetail
- Heat pump model
- 3 × Aqua4
- Refrigerant
- CO₂ (R744)
- Application
- Greenhouse process heat, cooling and CO₂ enrichment
- Commercial model
- Energy-as-a-Service
Results and impact
- 4.8: Highest COP across the Tequs fleet
- 10,000 m²: Commercial greenhouse footprint
- 1.2 GWh: Recovered heat energy, first 6 months
- ~1,000,000 L: Water recovered via dehumidification, first 6 months
- Several GWh/yr: Estimated annual energy savings
- ~750 t/yr: Avoided CO₂ emissions per year
References.
Public buildings
HealthcareOslo University Hospital
Three units, field COP 3.2, around 105 tonnes of CO₂ avoided per year.
IndustryStatkraft, Meråker
Three units in a greenhouse, COP 4.8, around 750 tonnes of CO₂ avoided per year.
HospitalityHolmen Fjordhotell
One unit supplying space heating and hot water for 170 rooms, saving around 191,000 kWh a year.
AquacultureNekton Aquaculture
One unit delivering 85°C heat from seawater, COP 3.25, around 35 tonnes of CO₂ avoided per year.
