The Tequs heat pump at the Norwegian Refrigeration Meeting 2024. Photo credit: Tequs
The Tequs heat pump at the Norwegian Refrigeration Meeting 2024. Photo credit: Tequs.

Tequs Launches New Commercial Water-to-Water CO2 Heat Pump

The Tequs heat pump is available in eight different models and can provide domestic hot water and space heating and cooling.

Norwegian heat pump manufacturer Tequs has launched a CO2 (R744) plug-and-play water-to-water heat pump for the European market that can provide domestic hot water, space heating and cooling for a variety of applications.

The TCHP heat pump is available in eight models and offers a heating capacity ranging from 17.4–268kW (4.9–76.2TR) and a cooling capacity of 13.5–210kW (3.8–59.7TR). It can provide hot water temperatures up to 90°C (194°F) and has a heating COP of 2.5–5.5 and a cooling COP of 2–5, with the COP level varying depending on the model chosen. 

Tequs says its CO2 heat pump can serve multiple applications, including heating swimming pools, cooling servers in data centers and providing space heating and cooling in multi-family residential buildings. The company has said its heat pump can be installed by “all competent professionals,” including plumbers, ventilation specialists and refrigeration installers.

Tequs says CO2 was chosen because it is an “ideal refrigerant for heat pumps where high temperatures are needed.” While CO2 heat pumps can heat water to higher temperatures more efficiently than propane (R290) heat pumps, they lose efficiency when the return water temperature exceeds 30°C (86°F). Tequs says it has engineered its heat pump to be able to accept return temperatures up to 50°C (122°F).

Tequs originally announced its CO2 heat pump in 2022.

Scaling plans

NaturalRefrigerants.com spoke with Tequs CEO Joakim Søgård, CTO Marius Hugo Sandem and CIO Kenneth Grande about the new heat pump during the Norwegian Refrigeration Meeting 2024, held April 10 and 11 in Oslo.

Søgård told NaturalRefrigerants.com that Tequs is preparing to enter a massive growth phase, which will be powered by new partnerships. 

“We recently formed a consortium with five strategic partners [Hafslund, Eviny,  Kongsberg Innovation, Startuplab, Venture Momentum Partners] that have significantly contributed to our equity and resources, enabling us to integrate the units into our production line and take a hands-on approach during the initial delivery phase,” said Søgård. “This proactive involvement allows us to tailor our strategies to meet project demands and customer needs effectively, ensuring high-quality outcomes as we prepare for broader scaling.”

Søgård, Sandem and Grande spoke with NaturalRefrigerants.com about their scaling plan along with the unique design of the Tequs TCHP series. This interview has been edited for length and clarity.

The TCHP series provides domestic hot water and space heating and cooling. What challenges did you face in designing a heat pump with all three capabilities?

Marius Hugo Sandem: One of the primary challenges in developing our heat pump has been achieving a compact design while ensuring stable operation. This is crucial as the system needs to adapt to various applications. Careful selection of components, particularly heat exchangers, is essential. Finding suitable controllers has also been a significant hurdle as standard options do not meet our specific requirements.

How does the Tequs CO2 heat pump achieve such high COPs?

M.S.: Our CO2 plug-and-play heat pump achieves high energy efficiency through advanced components and precise engineering calculations. An essential feature is the ejector, which increases the suction pressure to enhance the system’s thermodynamic efficiency. This reduces energy consumption while maintaining adequate performance.

With plans to expand beyond Norway into the European market, what steps are you taking to ensure the heat pump meets diverse regional standards and demands?

Joakim Søgård: For each new market we enter, we initiate pilot projects and consult with experts to ensure compliance with all local standards. We prioritize closely monitoring the initial installations, effectively “sleeping next to the machine,” to ensure that everything from commissioning to the default installation processes meets the highest quality standards. We are focused on delivering high-quality projects rather than immediate profit in these early stages.

Italian OEM Rivacold is your manufacturing partner. What were the key factors in choosing Rivacold to build the TCHP series, and how has this partnership influenced the design and production process?

J.S.: We recognized the need for a partner capable of high-quality production and large-scale output to meet market demand and sought a manufacturer that could deliver large volumes and maintain exceptionally high standards. After extensive research, Rivacold offered the best combination of robust production capabilities and stringent quality control procedures.

What does your scaling plan look like?

J.S.: We are focused on successfully delivering our initial projects this year, with some scheduled before summer, across various applications. We aim to evaluate how these projects perform within Europe, especially as we introduce a few units for retrofit gas projects in the European market. We plan to scale up our operations gradually, and are cautious about expanding too quickly. We aim to maintain control over every aspect, from performance to long-term reliability. To ensure quality, we have partnered exclusively with highly reputable and skilled contractors.

What training or support does Tequs provide for installers and end users to ensure successful deployment and operation?

Kenneth Grande: We support new customers by inviting them to join us during commissioning. Additionally, we are developing a training program where customers can visit our Oslo, Norway, facilities to receive training on commissioning and service. We commit to assisting with or directly handling the first commissioning for the Norwegian and broader European markets to guarantee a successful start.

“We are focused on delivering high-quality projects rather than immediate profit in these early stages.”

Joakim Søgård, Tequs CEO

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