From the field: Hanse Hotel — Attendorn, Germany

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While visiting the ISH Show in Frankfurt, Germany, I was fortunate enough to take some extra time to visit the Aquatherm manufacturing facility in Attendorn, Germany. And, one of the many highlights of the trip included visiting the mechanical room at the Hanse Hotel, which incorporated many of the Aquatherm products on the market today.

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The facility manager at the Hanse Hotel checks on one of the Grundfos Magna3s.


In April 2013 the Hanse Hotel opened for business guests, as well as tourists. Aquatherm founder Gerhard Rosenberg, the building owner of this 99-room hotel, makes his dream come true in his hometown by of course following his lived values: highest quality, sometimes on the cusp of feasibility, always at the state of the art.

The modern building adds a new aspect to Attendorn’s cityscape. Aquatherm systems have been used in all areas. Particularly important for the architectural freedom in the building which is in the shape of an eight, was the incorporation of the Aquatherm Black system heating and cooling grids. The Black’s compact grid construction allows a quick installation in wall, ceiling or floor areas. Depending on the chosen water temperature, it is possible to heat or cool.

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David Morrell, right, checks out the Aquatherm Blue piping for HVAC.


The tour consisted of Dave Morell, president, Ridgeline Mechanical Sales, Bozeman, Mont., a group of contractors from the Northwest—all of whom have experience with Aquatherm products—and our Aquatherm tour guide, Philip Menke, International Sales.

The product systems used are Aquatherm Green Pipe for potable water supply; Blue Pipe for HVAC; Lilac Pipe for reclaimed water; Red Pipe for fire sprinkler; Orange Pipe surface heating; and Black Pipe—in beta testing here in the States—for heating and cooling system at the wall and ceiling,” says Menke.

Radiant heat is the key word, and for this purpose grids were included inside the outside walls, which are flushed with comparatively lukewarm water to heat the rooms. The flow temperature is 40°C only. In addition, heating pipes are lying in the floor. A one-meter-wide strip along the outside wall is heated. The ceilings in the hotel in the first line take over the cooling of the hotel. They are equipped with the Aquatherm pipe grids, too. This surface heating and cooling system provides a pleasant room climate without disturbing draught. Cold water in the pipes is emitting the temperature to the ambiance.


The Aquatherm Black piping—now in beta testing in the States—shown here in its grid configuration, provides heating on the walls and ceilings at the hotel, and it is easy to install.


The guests profit from the comfortable room climate, and as raisings of dust are thus avoided, this is an ideal solution for allergy-prone guests. Missing radiators do not only save costs and space in connection with the architectural freedom of design, and it also makes it easier to clean the rooms. And another advantage: As the walls are heated directly there is no condensation, which prevents mold formation. Fresh, preheated air is supplied into the room through a small nozzle and outlet over the bathroom.


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