Field and Laboratory Emission Cell (FLEC) emissions testing is approved as an emissions testing methodology ONLY for furniture and furnishings that are made up of a uniform material and have flat testing surfaces on which the FLEC emissions testing methodology may be applied. For example, flat surfaced cabinetry that is made up of a uniform material may be tested using this methodology. However, chairs that are made from a variety of materials that lack flat surfaces may not be tested using this methodology. The emissions test must be administered by a third party investigator with no affiliation with the project. The associated costs are the responsibility of the project team.

Additional tests performed in accordance with ISO 16000 methodology must be performed for total aldehydes and 4-Phenylcyclohexane and must meet the thresholds specified in the WELL Building Standard.