Height corresponding to the proximity of

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Next, we look at the image of the air duct diameter diagram and select the appropriate parameter.

Considering that the air speed in natural ventilation ducts is about 0.5-1 m/s, for the “approximate” garage calculated above, round air ducts with a diameter of 500 mm are required. Or profiled ones, with an internal cross-section of 450x500 mm.

To improve air flow, you can install a lattice air intake at a height of up to half a meter from the garage floor instead of an air duct pipe. Moreover, its cross-section should be two to three times larger than that of the exhaust pipe. Ventilation will improve, but the car box will freeze in winter.

It is necessary to equip the supply grille and exhaust with hong kong mobile database or removable covers, allowing the air intake cross-section to be reduced if necessary.

Please note the sequence of partial overlapping of the exhaust and supply openings - first the supply, then the exhaust.

To select a suitable cross-section of a rectangular air duct, it is enough to find the diameter of a round pipe that matches it.

It is important that the cross-section of the exhaust pipe is not larger than the cross-section of the supply air intake - this will cause the draft to reverse. Therefore, when partially closing the supply air duct, it is necessary to reduce the cross-section of the exhaust pipe.

The exhaust air duct must be routed strictly vertically and at least 500 mm above the plane of the garage roof.

Above a gable roof, the hood must be raised to a the roof ridge to it (see diagram in the image).

If an inspection pit for repairs and a cellar for storing food are installed in the garage, then separate supply and exhaust air ducts will need to be installed to ventilate the underground spaces.