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Technical Guideline for Air Pollution Control

The Technical Guideline for Air Pollution Control (TA-Luft) is a general administrative specification under federal pollution control law (BImSchG). Legal base for the TA-Luft is 48 BImSchG.

The TA-Luft serves to protect the general public and the neighbourhood against harmful effects of air pollution on the environment and to provide precautions against harmful effects of air pollution in order to attain a high level of protection for the environment altogether.


Immissions are in terms of "TA-Luft" air pollutions that impact on people, animals, plants, the soil, the water, the atmosphere or cultural heritage and material assets.


Maximum immission values for substances to protect human health


Substance / Element groupConcentration
Averaging period
Lead and its inorganic compounds as parts of airborne particulate matter (PM-10), specified as PB0,5year
Airborne particulate matter (PM10)40
24 hrs
Airborne particulate matter (PM2,5)25year
Sulphur dioxide50
24 hrs
Nitrogen dioxide40



Immissions are in terms of "TA-Luft" air pollutions that extinguish from plants, indicated as follows:

Masses of emitted substances as related to the volume

  • of waste gas under standard conditions (273.15 K and 101.3 kPa) after subtraction of the water vapour content
  • of waste gas (wet) under standard conditions (273.15 K and 101.3 kPa) before subtraction of the water vapour content 
  • quantity of fibres emitted (fibre dust concentration), as related to the volume of waste gas under standard conditions (273.15 K and 101.3 kPa) after subtraction of the water vapour content

Emission values of certain substances according to valid TA-Luft (stand 2002). 


Mass concentrations in mg/m³ Mass volume in g/h
Total dust including particulate matter20200
Dusty inorganic substances
Class I: Hg, TI0,050,25
Class II: Pb, Co, Ni, Se, Te0,52,5
Class III: Sb, Cr, Cyanide, Fluoride, Cu, Mn, Vn, Sn15
Gaseous inorganic substances
Class I: e.g. arsine0,52,5
Class II: e.g. chlorine315
Class III: e.g. ammoniac3015
Class IV: e.g. sulphur oxides3501,800
Organic substances
Total carbon50500
Class I20100
Class II100500
Carciongenic substances
Class I: z.B. arsenic0,050,15
Class II: z.B. arcrylonitrile0,50,15
Class III: z.B. benzol12,5

General requirements for emission limitations

The dust emissions contained in the waste gas shall not exceed the mass volume 0,20 kg/h or the mass concentration 20 mg/m³. Also when complying or falling below of a mass volume of 0,20 kg/h, the mass concentration 0,15 g/m³ in the exhaust gas is not allowed to exceed (TA-Luft, part 5.2.1).

The "TA-Luft" offers among others binding values for permissible dust emissions within the exhaust gas, which can also apply for exhaust air on the clean gas side of filters.

MAK values and BAT values

The new GefStoffV (Regulation on Dangerous Chemicals) knows only healthbased values, called occupational exposure limit value AGW and biological exposure lmit values BGW. The old terms MAK values and BAT values can and should be used as benchmark until the complete implementation of the new GefStoffV.

The MAK value specifies the maximum allowed concentration of a compound as gas, fume, or suspended matter in the air of working places where no health risk is expected, even when normally exposed to the concentration 8 hours daily, maximum 40 (42) hours per week (shift duty).

The BAT value means the maximum allowed concentration of a agent in blood, blood plasma or breathing air of humans where according to current knowledge health of humans is not harmed. BAT value can not be specified for carcinogenic substances.

TRK values

The Technical Reference Concentration (TRK values) specified the concentration of substances as gas, fume or suspended matters in air of working places, which was a guidance for protection measures to be taken and the measurement supervision at working places.

The TRK values was specified for carcinogenic, suspected carcinogens and mutagenic substances when no MAK value was declared.

Occupational exposure limit value and biological limit value

With the legal validity of the new hazardous substances ordinance on January 1st, 2015 exist a new limit value concept. The new GefStoffV knows only health based limit values, called Occupational exposure limit value (AGW) and biological limit values (BGW).

Extract out of applying regulations

  • ZH 1/200: Guidelines for the avoidance of explosion hazards due to electrical charges
  • VDI 2263: Dust fires and dust explosions
  • VDI 3673: Pressure relief of dust explosions
  • VDI 2264: Operating/maintenance of dedusting systems
  • VDI 3677: Filtration separator
  • VDI 2066: Dust measurements in flowing gases

Overview filter classes


Important notice for reading of the table!
The two standards DIN EN 779:2012 and DIN EN 1822:2011 are based and harmonised one on the other. Because of different test conditions between DIN EN 60335-2-69:2010 and these two standards, a comparison of dust classes with filter classes can only be approximate.

Comment to DIN EN 779:2012
The minimum efficicency is the lowest efficiency determined by the efficiency of the unloaded filter, the beginning efficiency and the lowest efficiency measured during the loading process.

DIN EN ISO 16890 has replaced DIN EN 779 in 2018.

Comment to DIN EN 1822:2011
First, the fractional efficiency of the flat sheet filter medium is measured and the particle size at which minimum efficiency occurs (MPPS) is determined. The integral arrestance of the filter element is determined for the minimum efficiency (MPPS) at nominal volume flow rate. Filters of group E cannot and need not be leak-tested for classification purposes; group E filters are rated statistically (DIN EN 1822-5:2011). Filters of groups H and U shall each be tested integrally and individually for zero leakage. Filters of group H shall pass one of the three leak test methods described in DIN EN 1822-4:2011. Filters of group U are tested exclusively using the scan method (DIN EN 1822-4:2011). The particle size at which minimum arrestance occurs is 0,1 to 0,2 µm for fibre-glass media, and less than 0,1 µm for PTFE membrane filter media.

Comment to DIN EN 60335-2-69:2010 annex A
Dust removal equipment (e.g. vacuum cleaners and dust extractors for commercial use) were tested and classified according to ZH 1/487. This purely national test method has been converted into an european standard, which has been the basis for rating dust removal equipment since 1998. In 2010, this standard DIN EN 60335-2-69 was adapted to the basic requirements of EC Machinery Directive 2006/42/EC with the aim to have it listed under this Directive.

WEL = Workplace Exposure Limit


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