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VR 300 ECV/B Installation description
206552 (12-12-2012)
11 Systemair AB
1.
Inlet
iffuser (ceiling mounted)
2.
Extract diffuser/air valve
3.
Flexible silencer with frame
Fig.7
Air circulation between rooms
To obtain a satisfactory air circulation, a small gap should exist around the doors between rooms with inlet
diffusers (living rooms and bedrooms) and rooms with extract points (bathroom, WC, kitchen, laundry
rooms etc.). Install doors with slot in the frame, doors without doorsill or slots/vents in doors/wall (min. 70
cm
2
free area per extract diffuser)(fig.8).
Fireplace, kitchen ventilator, tumble dryer etc.
Balanced ventilation is obtained where the VR 300 ECV/B is installed. There will normally be no under
pressure in the building, and therefore no risk for back draught from fireplace or chimney.
An open fireplace requires an air supply of 150 – 300 m
3
/h (40 – 80 l/s) for maximum functionality and
efficiency. This equals 300 cm
2
ventilation slots per fireplace. Supply air duct directly to the fireplace would
be the optimal solution, but 2 pcs. 16x16 cm closing vents in outer wall is a good alternative (Fig.9).
When cooker hood is connected to the VR 300 ECV/B, the airflow will automatically be increased when
kitchen extract is in use. A minor under pressure in the building could occur. This can be solved by slightly
opening a window or by leaving a vent in the wall open while cooking.
16x16 cm vents could be installed for air supply to tumble dryer and kitchen ventilator (one for each).
These should preferable be installed in the same room. An open window will also give the required air
supply to fireplace, kitchen ventilator and tumble dryer.
Fig.8 Fig.9
Ø125 mm
Ø100/125/160 mm
Ø100 mm
Ø100/Ø125 mm
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