Design:
The construction of the room-in-room system must be based on a base frame that is aligned and levelled in the room. It must be acoustically sealed downwards (dry), however, it is not to be connected to the floor and the existing building structure. This has the advantage that the room-in-room system can also be set up on heated floors.
The corner elements, the technical wall and the closed or glazed wall sides are to be fixed onto the aligned frame. An all-round profile structure is then to be used to connect the elements at the top. Subsequently, the ceiling structure must be installed. It must always run perpendicular to the technical wall. The interior ceiling cladding must consist of light grey PET felt panels, while the exterior cladding must be made of melamine-coated chipboard.
The technical wall must contain the ventilation, the control system and the complete power supply for the room-in-room system. The room is to be supplied with electricity via this wall. In addition, the wall must have a surface to which a monitor can be attached. On the inside, the technical wall must be covered with PET felt panels or fabric-covered panels, while the other closed walls must be fitted with melamine panels. All panels are to be fixed with a quick-fix system so that they can be easily replaced.
Finally, the fixed glass panels and the glass door must be fitted and the glass manifestation is to be attached.
Exterior roof:
The ceiling of the room-in-room system must come in clear white melamine as standard. Optionally, it must be possible to design the ceiling panels in the same colour as the exterior walls and corner elements. This is recommended if the room-in-room system is installed in a building with a gallery and one can look down on the room-in-room system from above.
Ceiling on the inside:
The ceiling of the room-in-room system must be a flush-mounted system ceiling. The ceiling must be aligned from the technical wall to the opposite side and must be split into several segments. Light grey PET felt panels must be fitted into the ceiling construction from below. It must be possible to assemble and disassemble them individually.
The fresh air from the surrounding room is to be brought into the room-in-room system via the ceiling through a sound-absorbing air supply system. Two PET felt panels in the ceiling must have perforated patterns for this purpose, through which the air flows in from the outside. The elements for the air supply must be flush-mounted in the ceiling, so that no ventilation structures are necessary inside or outside.
There must be two different set-ups for the lighting. In Set-up 1, two LED panels are to be mounted on the ceiling. They are always to be arranged perpendicular to the technical wall and be suitable for meetings with a centrally positioned table and orientation towards the technical wall (e.g. monitor). In Set-up 2, the lights are to be installed flush with the ceiling across the entire room. They are, therefore, almost invisible, and allow for the room to be evenly lit. This option is, therefore, suitable for changing furniture settings.
Floor:
The room-in-room system is not to have its own floor and can, therefore, be freely positioned in the building. A mechanical connection to the building is not required. The entire room-in-room system is to be mounted on an adjustable frame, thus enabling the compensation of floor unevenness with up to 25 mm. There is to be no door threshold, thus enabling wheelchair-accessible use.
Glazing:
It must be possible to fit the room-in-room system with glass panels (safety glass) on one, two or three sides. The door side must always be glazed. In the case of two- or three-sided glazing, the side walls and the wall opposite the door must be glazed. All glazed surfaces are to be provided with 180 mm high glass manifestation at a height of 1400 mm, which complies with the workplace guidelines.
The fixed glass surfaces must be available in the following glass quality:
- 12.76 mm (laminated safety glass with an intermediate acoustic foil) (39 dB RwP)
Doors:
The all-glass doors must always be hinged on the left or right on the corner element. The door must always open to the inside. The fittings, the lowerable floor seal and handles adhered upright to the glass surfaces must be delivered in graphite structure metallic.
The glass doors must be available in the following glass quality:
- 10.76 mm all-glass door (laminated safety glass with an intermediate acoustic foil) with lowerable floor seal
To improve sound level reduction, the doors must be equipped as standard with magnets that pull the door leaf to the seals.
The doors must be equipped with dummy cylinders and cannot be locked as standard. It must be possible to insert profile cylinders with 56.5 mm backset into the lock case to allow for adaptation to customer-specific locking systems.
Acoustics:
The room-in-room sound system insulation must be so good that it can be positioned in the middle of an office. Speech intelligibility depends on the ambient noise level in the surrounding space.
Depending on the floor covering, the use of ceiling and wall absorbers must help to achieve optimum room acoustics without flutter echoes and low reverberation times . The PET felt panels in the ceiling and the technical wall must improve the reverberation time of the room-in-room system, thus leading to better speech intelligibility. Furthermore, the technical wall is to be additionally insulated and thus have a positive influence on the sound level reduction and the reverberation time.
The room-in-room system must be subjected to acoustic testing to determine the sound level reduction and reverberation values. The sound level reduction describes sound transmission from the outside of the room-in-room system and vice versa.
Certification according to DIN EN ISO 11957 (2010) must be available.
Ventilation:
The ventilation unit must be integrated into the technical wall and have a maximum capacity of 300 m³/h.
The fans in the technical wall must create a negative pressure in the room-in-room system and draw in fresh air from the surrounding room through the air inlets in the ceiling. The fresh air must flow through the room and must later be drawn in as stale air in the lower part of the technical panel and released back into the surrounding room via the fans above the technical panel. Large cross-sections and sound-insulated ventilation ducts, both in the area of supply air and exhaust air, must ensure that the room is extensively ventilated and that, at the same time, noise is not transmitted. Therefore, the process must be quiet and have no perceivable draught.
Optionally, it must be possible to equip the ventilation unit with a filter. It must have a recommended maintenance cycle of approx. 18-24 months when used in typical office buildings and depending on the quality of the prevailing ambient air. To replace the filter, it must be possible to open the inspection flap at the bottom of the technical wall and replace the filter cassette.
Fully automatic control must take place via the presence detector in the technical panel. It must control the fans based on the CO² level in the room air and the room temperature in the room-in-room system. An optional membrane switch must be available for manual control, it must be possible to individually control the lighting and ventilation.
The following air exchange rates for each room size, depending on the temperature and CO² levels, must be achievable:
- External dimensions: W 3000 x D 3000 x H 2400 mm:
- 83 l/s corresponds to max. 300 m³/h, air exchange rate: max. 16.2 rv/h
- External dimensions: W 3000 x D 4000 x H 2400 mm and W 4000 x D 3000 x H 2400 mm:
- 83 l/s corresponds to max. 300 m³/h, air exchange rate: max. 11.8 rv/h
- External dimensions: W 4000 x D 4000 x H 2400 mm:
83 l/s corresponds to max. 300 m³/h, air exchange rate: max. 9 rv/h
The run-on time for ventilation after leaving the room must be set to 6 minutes to ensure a complete exchange of air and thus guarantee that the room is optimally prepared for subsequent use.
Fire protection:
On request, it must be possible for drill holes to be created for integrating on-site elements, such as fire detectors, loudspeakers and sprinklers.
Packaging:
Items must be supplied in sections for on-site final assembly in order to keep the transport volume as small as possible.
The transport volume for the room-in-room system in all sizes must be 17 m³ incl. loading equipment.
Delivery and assembly:
With the room-in-room system, delivery, carrying and assembly costs are always to be calculated separately according to expenditure, which means a customised quotation is to be created.
Depending on the size of the room-in-room system, the pure assembly time (without carrying) must be approx. 10–12 hours.
Quality and ecology:
The room-in-room system must be designed to meet the following requirements:
- Certificate of static stability "Construction type tested for safety" by TÜV Rheinland
- CE certificates for all electrical components (lights, fans, cables, sockets and controls)
The product manufacturing processes are to be certified to the following standards:
- DIN ISO 14001 Environmental management
- DIN ISO 9001 Quality management
- DIN ISO 50001 Energy management
- DIN ISO 45001 Occupational health and safety management systems
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