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M1 Finnish label

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M1 is the short version name of the Finnish voluntary emission classification of building materials. M1 is the name of the lowest emission class of that system.

The emission classification of construction products for interior use is based on an emission chamber test after 28 days. Chemical testing parameters are TVOC, 1A and 1B carcinogens (EU classification), formaldehyde, ammonia, and an odour acceptability test (modified ISO 16000-28 test, or CLIMPAC test; odour shall be neutral (or better acceptable) under the test conditions).

Please see also for further information:

Further Information

M1 is administered by RTS. For more details, please visit RTS website or any of these links:

News in 2015 testing method

  • Office furniture now is included and detailed specifications are given in chapter 6.3.10.
  • Table 1 on loading factors for testing was updated in chapter 6.2
  • Specifications on how to measure VOCs were updated in clause 6.5.1

News in 2014 testing method

As before, M1 continues to require ammonia and odour testing on top of 28 days VOC and formaldehyde testing. This is different from the other low VOC specifications on the market.

A number of significant changes of the M1 label were implemented with validity from 01.01.2014, and with the most recent changes as of 08.04.2014:

  • Loading factors for chamber emission testing are adapted from CEN/TS 16516.
  • TVOC definition is harmonized with CEN/TS 16516.
  • Several details on how to make a test specimen of a product sample are revised.
  • Open storage of test samples before the 28 days no longer is allowed; storage must occur in a test chamber or in a separate storage chamber under controlled conditions.
  • Odour testing no longer requires a separate odour test chamber. Instead, an ISO 16000-28 acceptability odour test is required, e.g. with sampling test chamber air into a gas bag right after the last air sampling after 28 days; odour will be determined then with the air from these gas bags. The odour scale experienced a small change, now it is continuous (earlier, the value 0.0 did not exist).
  • Fixtures (mounted furniture, e.g. in built-in kitchens) are a new product group available for M1 labelling

It is stated that tests made for other emission classification systems than M1 will be accepted, if the tests are performed by an M1 approved lab, and following the M1 testing methodology. But at the same time, some changes of the test method increased the differences from other low VOC specifications, especially for some paints and for adhesives, but also for doors, windows, and "fixtures" (mounted furniture e.g. in built-in kitchen).

Eurofins Product Testing A/S is working on combining M1 tests with other tests, such that manufacturers can order one single combined test and receive test data that can serve all low VOC emissions specification across whole Europe, if not even globally. The new changes in the M1 test method require a revision of this approach if M1 shall be included in such a global VOC emissions test.

Eurofins services

Eurofins offers documentation of compliance with above specifications on emissions of VOC, aldehydes, ammonia and odour by independent testing.

Costs can be saved if a M1 test is combined with other VOC emissions testing. But please note that

  • RTS requires that the whole M1 test is performed with the same sample and at the same time, for avoiding any error by ageing of sample; you cannot first perform VOC and formaldehyde tests for other purposes and then later decide to add the tests that you are missing for M1 (ammonia and odour) without repeating also the VOC and formaldehyde testing.
  • RTS requires that they approve the selection of representative or worst-case sample for covering a whole group of products in advance; this decision by Finnish RTS can be different from the decision by others on the same subject (e.g. German DIBt or Blue Angel).
  • RTS has different specifications for testing some products than other regulations or labels do.
    This concerns mainly some coatings, adhesives, doors, windows, fixtures (mounted furniture).

Contact to VOC Testing Laboratories

Please see here contact information of Eurofins VOC testing laboratories in Europe, China and Japan: