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STULZ worldwide

  • Almere

  • Heat Pumps

  • Q-ton


  • Mitsubishi Heavy Industries

  • Heating

The Customer

From electrical engineering to plumbing, from heating and cooling to data and telephony, from measurement and control technology to plumbing. INNQ has all these areas of expertise in-house. They specialise in customised installations that exceed expectations and take the future into account. They are also available to our customers 24/7 in case of breakdowns.

The challenge
Our solution
The result
Our product

The start for this project was the demand from the end user to realize a fully energy-neutral building. Important for the solution to be chosen was the fact that the solution had to be fully electric and also gas-free. This required a targeted and adapted design of the installation. This is because the Q-ton is originally suitable for heating warm water. For this solution it was desirable that the heat pumps could heat the entire distribution center. Because the solution had to meet the above requirements, good communication and cooperation was required between InnQ and STULZ to bring the project to a successful conclusion. In addition, STULZ also fulfilled a role as a consultant to ensure that the design properly meets the wishes of the client and the end user.

As illustrated above, the Q-ton heat pump from Mitsubishi Heavy Industries was chosen as the ultimate solution, no fewer than seven in total. The highly efficient Q-ton is an air-water heat pump that works exclusively with CO2 gas as a refrigerant. This makes the heat pump extremely suitable for a fully electrical installation. The Q-ton has the world's first two-stage compressor to combine rotary and scroll technology. At low outside temperatures, the system maintains its high efficiency and excellent performance. The Q-ton also excels in its low GWP (Global Warming Potential) value of 1 and ODP (Ozone Depletion Potential) value of 0. This makes the heat pump extremely environmentally friendly.

The Q-ton heat pump has helped to make it possible for's new distribution center to be completely energy neutral and gas-free. The solution is realized within a month (from time of request to delivery). We at STULZ are of course very proud of this, the cooperation between InnQ and STULZ has been very pleasant on both sides. And the end user is also very satisfied with the final result.

All parties involved can look back on a successful project in which the new distribution center was made completely energy neutral and gas-free. Both InnQ and STULZ praise the cooperation with each other and see each other as a reliable party for carrying out these types of projects.

That is only possible if you spend a lot of time and energy on the relationship with your customers. ” The renovated building is future-proof, partly thanks to the Q-ton. With maximum efficiency and a minimal ecological footprint. STULZ offers climate solutions with products in precision cooling, comfort cooling, humidification and heat pumps. STULZ carries the brands Mitsubishi Heavy Industries, CAREL and S-Klima.


The high efficiency Q-ton is an air-to-water heat pump using CO2 gas as a refrigerant, which can be used in a variety of applications for the supply of sanitary hot water. Q-ton has been featured as the world’s first two-stage compressor (combining rotary and scroll technology). It maintains high efficiency and significantly improves performance at cold outside air temperatures.


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Individual solutions with STULZ

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