Ruden LEAT geothermal heating and cooling

• Published 21 March 2023; updated 21 September 2026; estimated reading time 2 minutes.
• Product: Low Enthalpy Aquifer Technology (LEAT), an open-system geothermal heating and cooling system for commercial/residential buildings and infrastructure such as stations and airports.
• Design: uses geological modelling informed by oil-sector technology to exploit naturally occurring fractures in bedrock. The page compares about 10 wells for LEAT with roughly 250 wells for conventional systems.
• Suitable geology: crystalline or consolidated rock; the page notes use where conventional well arrays lack space.
• Benefits claimed: lower drilling footprint, reduced resource use and greenhouse-gas emissions, lower operating friction/cost, and faster response to ambient temperature changes. The page claims up to 95% fewer wells than other systems.
• Market and projects named: Ruden was established in 2007; projects include Oslo Science Park, Asker Panorama and Økern Portal. It is developing a HEAT system at Kvitebjørn Energi in Tromsø and an iHEAT renewable-energy storage system.
• Historical market figures on page: geothermal heating/cooling market valued at USD 70 billion in 2017, forecast to reach USD 187 billion by 2024.
• Contact shown: Helene Ree Ruden, Director, helene@rudenas.com. Company: Ruden AS, Mariusbakken 1D, 1628 Engelsviken, Norway.
• Listed industries: energy/buildings and geothermal energy; architecture and construction. Linked UN SDGs: 7, 9 and 11.

Additional captured detail 1

• Published 21 March 2023; updated 21 September 2026; estimated reading time 2 minutes. Listed under Energy / Buildings and Geothermal energy, and Architecture and construction.
• Ruden’s Low Enthalpy Aquifer Technology (LEAT) provides geothermal heating and cooling for large commercial/residential buildings and infrastructure such as stations and airports. It models naturally occurring fracture networks in crystalline or consolidated rock to create an open system. The article says this approach can deliver the heating/cooling otherwise requiring about 250 conventional wells with around 10 wells, and is useful where conventional well fields do not fit.
• The page describes buildings as using about one-third of global energy, with heating/cooling accounting for half of that. Conventional geothermal systems are said to require many wells, creating excavation, resource and carbon impacts. Ruden says LEAT uses oil-and-gas subsurface modelling, reduces friction and energy use, and requires up to 95% fewer wells, reducing emissions and allowing faster response to ambient-temperature changes.
• Ruden reports installations at Oslo Science Park, Asker Panorama and Økern Portal, and development of a HEAT waste-heat project with Kvitebjørn Energi in Tromsø. It was also developing iHEAT for large-scale renewable-energy storage.
• Market context cites a global geothermal heat-pump market of USD 70 billion in 2017 and forecast USD 187 billion by 2024; this is an expired projection.
• Linked to SDGs 7 (Affordable and clean energy), 9 (Industry, innovation and infrastructure) and 11 (Sustainable cities and communities) for renewable heating/cooling and more resource-efficient buildings.
• Contact: Helene Ree Ruden, Director, helene@rudenas.com. Company: RUDEN AS, Mariusbakken 1D, 1628 Engelsviken, Norway; rudenas.com. A phone-number reveal control is present.