Blog | HydroTop Works

Why you should choose the HydroTop roof solution

Written by Author | Nov 19, 2025 9:17:51 AM

As you may already know, DHPS has an innovative roof solution for your heat pump. In this blog, you will learn more about the benefits of this HydroTop roof solution and we will tell you why it is an opportunity when it comes to sustainable living.

Heat pump in roof, what about it?

In both existing construction and new construction projects, there can be complicated situations for the application of heat pumps. Consider the noise, space and appearance of the heat pump installation. The HydroTop has been developed for these types of situations. This roof-mounted solution is characterized by the simplicity of the product, takes up little space and integrates seamlessly into the roof of the house. Thereby, the heat pump gets its energy from the outside air. Here, the outdoor unit is built-in and the indoor unit is often placed as close as possible to the HydroTop. This combination is placed in the attic of the house, just like a skylight, through an opening in the roof. The part that extracts energy from the outside air protrudes about 15 inches above the roof.

Below we have listed some of the advantages of this solution for you:

  • Integrated solution in the roof
  • Suitable for existing and new buildings
  • Aesthetically pleasing
  • Takes up minimal space both inside and outside
  • Quick and easy to install fully prefabricated
  • Service and maintenance from the inside
  • Low-noise according to regulations
  • Integral combination with exhaust MV or heat exchanger

Ideal solution with regard to heat pump noise

As of 2021 there are strict requirements for maximum heat pump noise. These requirements are part of the amended building code and apply not only to new homes, but also to existing homes. These specific requirements deal with the amount of noise at the property boundary: Maximum 45 dB during the day and 40 dB at night.

The big advantage of the HydroTop solution is that, as mentioned earlier, it is fully integrated into the roof and complies with the new regulations. This is because the rule on the property boundary does not apply to the roof, here the same noise rule only applies at the first neighbor's window or door to be opened. Since the HydroTop provides a large noise reduction, it is hardly necessary to take into account the placement of skylights in the roof area of the neighboring houses.

Good accessibility for heat pump maintenance

A heat pump is low-maintenance, but not maintenance-free. Periodic heat pump maintenance is important to extend its service life and to continuously get the most out of its energy-efficient operation.

With the HydroTop installation, service and maintenance can be performed from the inside. The HydroTop has a large service hatch at the rear that allows a technician to easily access the outdoor unit from the inside. Consideration has also been given to the long-term replacement of the heat pump, as the hatch is large enough to remove the outdoor unit and install a new outdoor unit.

Sustainability is paramount for us, and that includes the new HydroTop. The body of this solution is made entirely of recycled plastic, and the maintenance hatch and discharge hood are 100% recyclable.