Technical description

The building was designed by top Estonian architects Martin Aunin and Pia Tasa. The office building’s exterior was designed to be distinctive and modern, constructed from lasting, high-quality materials.
The design relies on a concrete supporting structure − load-bearing concrete posts and solid reinforced concrete intermediate floors. This also makes it easier to later modify the room according client needs.

An innovative radiant heating and cooling solution will provide an energy savings of up to 40%.

The building’s innovative energy solution is a unique ceiling heating and cooling system produced by Zehnder, a leading Swiss company in the field of indoor climate solutions. During hot periods, it is generally impossible to find two people who are both satisfied with the indoor climate: one person will complain about the heat and another about it being too cold, and not surprisingly, respiratory problems caused by air-conditioning are not uncommon.

The Zehnder ceiling heating and cooling system will eliminate these problems: the radiant modules lie just behind the familiar smooth plaster suspended ceiling, in direct contact with the tiles. The radiant modules consist of copper tubing, through which low temperature heating water (40/35 on the heating graph) or relatively “high” temperature cooling water (20/40) circulate. This transforms almost the entire ceiling into a single active heating and cooling element.

In the case of heating, the system functions like the sun. Radiant energy is directed from the warm ceiling to the solid bodies in the room (workers, furniture, walls, floor, etc.). The radiant energy is transformed into heat only as it comes into contact with the solid bodies.
During the cooling phase, cooling water at a temperature slightly cooler than that of the room circulates through the ceiling. Now the cooling water circulating in the “active” ceiling “captures” the heat radiation being emitted from objects, walls, and people in the room and transports it to the cooling station, where it is cooled.
In this way, the cooling process ensures an optimal sense of comfort. Since the entire surface of the ceiling is active, it is very easy to change the layout of the rooms without sacrificing comfort.

The ventilation system uses Zehnder Group’s ComfoAir XL unit, which has been certified by the Darmstadt Passive House Institute. Thanks to efficient EC motors, the ventilation system consumes about half as much electric energy as that prescribed by law in minimal energy efficiency requirements. High energy recovery means that over 80% of the waste heat in ventilation exhaust air is recovered, heat which would otherwise have been lost to the atmosphere, and as a consequence, the Tiskre Office Building, by selecting a radiant heating and cooling solution over a conventional energy solution, will succeed in achieving an energy savings of up to 40%.