This method of ventilation is more in demand in the cold season, when the use of conventional options will lead to excessive cooling of the room. This is especially relevant in children's rooms and rooms with a high probability of drafts.
Stepped opening
Unlike the previous method, the adjustment options of which are limited to one position, step ventilation provides wider possibilities for room ventilation. The ventilation gap is adjusted in accordance with external and internal climatic conditions in several positions (from 3 to 5).
As in the case of micro-ventilation, the step mode is available if the unit has special fittings.
There are two variants of it:
More aesthetically pleasing, when the step venezuela mobile database is located on the inside of the sash (under the rebate) and is not visible to others. The gap adjustment in such cases is performed using the opening handle and will correspond to the degree of its tilt (3-5 positions between the folding and turning position);
Less attractive in appearance, but much more affordable in terms of installation and cost - a comb. You can buy a comb in a hardware store
It consists of two elements – a strip with special notches (attached to the frame) and a counter-protrusion on the sash, which engages with the notches of the strip.
All the above methods require direct participation of people in the room, which is not always convenient. The ventilation process can be partially automated using special window modules and built-in devices.
Installation of three-stage micro-ventilation fittings on a plastic window:
Roto fittings for micro-ventilation
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