Case Study 3: Tertiary building/Offices in Berlin
A building of 2235 m2 with four different heating installations, two gas powered HVAC systems, one gas powered base building heating system and one gas powered "black heater" in the production area. The building is used by a metalworking company and can be divided into the following areas: Stainless steel production hall 2 of the plasma cutting machine, production hall 1, staff room, work equipment warehouse, lathe and milling shop, polish, paint shop and a warehouse. Above the work equipment warehouse, turning shop and milling shop are the offices on the 1st floor. The other areas are designed as an industrial hall. Production hall 1 already has a new, well-insulated roof made of sandwich panels and is heated by a gas heater (200 kWth). The lighting consists of LED retrofit. The paint shop still has the old, uninsulated roof construction. The air heater is powered by oil (203 kWth) and is located in the front area on the wall and heats it through an opening in the wall.
In the production hall 2, a middle wall was removed. This separated the ceiling radiator (approx. 20 kWth) heated area with the plasma cutting machine from the remaining, nonsuspended hall area. The rest of the area is now covered by heated fresh air, which is supplied externally via a ventilation duct. The fresh air heater has a heating capacity of approx. 45 kW. It is a temporary solution, which was installed in the course of the restructuring of the production and is now to be optimally designed. The lighting consists of T5 luminaires in the suspended area and LED Retrofit T8 in the non-suspended area. The regular door openings allow the cooling of the hall.