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Table 7.3 - Optimal and acceptable microclimate parameters in the working
area of production premises by ДСН 3.3.6.042-99 Sanitary standards microclimate of
industrial premises

Perio Temperature, °C Relative The velocity, m / sec.
Category of works optimal Acceptable (permissible), permanent workplace Acceptable (permissible), non- permanent workplace optimal Acceptable (permissible) in the workplace Optimally, no more Acceptable (permissible), permanent and non- permanent workplace
d of humidity, %
the
year

cold Light Ia 22 - 21-25 18-26 60 - 75 0,1 not more 0,1
24 40
warm Light Ia 23 - 22-28 20-30 60 - 55 – at 0,1 0,1-0,2
25 40 28С
cold Light Ib 21 - 20-24 17-25 60 - 75 0,1 not more 0,2
23 40
warm Light Ib 22 - 21-28 19-30 60 - 60 – at 0,2 0,1-0,3
24 40 27С
cold Moderat 19 - 17-23 15-24 60 - 75 0,2 not more 0,3
e IIa 21 40
warm Moderat 21 - 18-27 17-29 60 - 65 – at 0,3 0,2-0,4
e IIa 23 40 26С
cold Moderat 17 - 15-21 13-23 60 - 75 0,2 not more 0,4
e IIb 19 40
warm Moderat 20 - 15-27 15-29 60 - 70 – at 0,3 0,2-0,5
e IIb 22 40 25С
cold Severe 16 - 13-19 12-20 60 - 75 0,3 not more 0,5
III 18 40
warm Severe 18 - 15-26 13-28 60 - 75 – at 0,4 0,5-0,6
III 20 40 24С

Rationing of the intensity of thermal radiation.

The intensity of thermal radiation on the workers from the heated surfaces of
process equipment, lighting devices, insolation on permanent and non-permanent
workplace must not exceed:
2
35 W/m at irradiation of 50% of the body surface or more;
70 W/m at an irradiation from 25% to 50% of body surface;
2
2
100 W/m at an irradiation of 25% of the body surface and less.
The intensity of thermal radiation on the workers from open sources (heated
metal, glass, "open flame") shall not exceed:
2
140 W/m at irradiation of 25% of the body surface and less - in this case,
necessary to use of personal protective equipment, including face and eyes means.

Meteorological Conditions Normalization Methods

1) Improvement of technological processes and equipment (removal of
intensive heating).
2) The rational placement of equipment; sources of heat are placed under
ventilation in order to prevent a thermal current crossing at the workplace.
3) Automation and remote control over technological processes. Employees
should leave the industrial zone where there are harmful factors.

4