Collection of conditional graphic designations for expert design of ventilation systems.
Processed and created on the basis of: STO NP AVOK 1.05-2006 "Conditional graphical notation in the projects of heating, ventilation, air conditioning and heating and cooling."

Composition:
- Air ducts.
- Air in the mine.
- Rectangular filters.
- Circular fittings.
- Exhaust and supply unit.
- Elements of ventilation systems.
- Fans.
- Refrigeration.

Format - DWG.
173 element.
100% in accordance with GOST.

Elements for easy tool palette assembled in blocks of AutoCAD 2010.

The archive also contains the halyards, made as a standard drawing format, DWG, compatible with AutoCAD 2004-2016, Compass, ZWCAD, nanoCAD, BricsCAD etc.