Due to difficult acoustics and hanging light fixtures, which could pose a problem for the ventilation, the classrooms were fitted with system ceilings as the ventilation needed to be upgraded.
– The new ceiling with integrated lighting has a smooth surface, providing ideal working conditions for the ventilation. It also makes for a far better indoor climate sound-wise, and it senses the users, says Kessler-Myking.
The light fixtures were replaced with demand-controlled LED lighting, which has provided much better lighting.
The air emitted by the ventilation unit along the ceiling should not encounter too many obstacles along the way if negative pressure (the Coanda effect) is to be maintained. So, it really helped that the old light fixtures at Bergsøy School were replaced. New LED lighting and a system ceiling were installed along with the ventilation units.
– The people at the municipality have been very practical and brilliant at finding good solutions, stresses the consultant from Airmaster Norway. They have chosen a combination of Airmaster AM 1000 ventilation units. Airmaster also supplied a cloud-based online control solution (Airlinq Online).
The ventilation units have built-in countercurrent heat exchangers. At the time of writing, in autumn 2018, it was still too early to conclude anything about how energy efficient they are in practice. And, as Kessler-Myking points out, the goal was above all to achieve a better indoor climate. It would be wrong to talk of low energy consumption when there was no ventilation before. And saving energy at the expense of the indoor climate, and not least the learning environment, would be wrong.
The ventilation units are available in a variety of sizes and variants such as ceiling-mounted, wall-mounted and floor-standing with various options with regard to air intake and exhaust.
The ventilation units are primarily placed by external walls. Without ducts, we have no additional pressure drop, and then the SFP factor for all Airmaster ventilation units is below 1.0. The units have countercurrent heat exchangers which can provide 85% heat recovery. Solutions for handling any condensation and ice formation are built in.