BS ISO 16000-28:2020 pdf download – Indoor air Part 28: Determination of odour emissions from building products using test chambers The standard procedure for odour assessment is carried out by using sample containers (see 6.3.3). Alternatively, direct assessment from the outlet of the emission test chamber is possible if sufficient air flow is assured (see 6.3.1).In this case the outlet shall be fitted with a funnel. NOTE Due to the requirements of 6.3.1 sufficient air flow is only possible if the following requirements are met: test chambers with more than 4,3 m 3 volume at 0,5 h −1 air change rate. If the odour assessment is carried out directly from the outlet of the chamber, the chamber material shall be non‑transparent, or the chamber shall be covered in order to avoid the panel members being influenced by visual recognition of the material in test. The test room in which the sensory assessment is performed shall conform with the general requirements described in 7.2. The panel members shall not be influenced by the working environment (light, acoustics, background odours). 6.2 Test room and recovery room The test room and the recovery room shall be odour neutral, sufficiently large and unobtrusively designed. Contamination of the room air by any source, e.g. by coatings, wall and floor coverings, furniture, shall be prevented. In preparation for sensory testing, the air in the test room and the recovery room shall be assessed for acceptability or perceived intensity (7.2.1), and the requirements set out in 7.2.2–7.2.4 shall be complied with. 6.3 Odour sampling and assessment devices 6.3.1 General The odour sampling and assessment devices shall ensure that — the air flow is sufficient to guarantee that the panel members inhale only sample air during the assessment, and — significant adsorption on the surfaces is avoided and the interface has no emissions of its own to interfere with the sample air. 6.3.2 Funnel The odour evaluation interface consists of a funnel, which is connected to the outlet of the sample presentation system or to the outlet of the emission test chamber. The funnel and the inner surfaces of the connection ducting shall be composed of glass or surface‑treated (polished) stainless steel. The air flow at the outlet from the funnel to the panel member shall be between 0,6 l/s to 1 l/s and shall be constant for the duration of each test session. The design of the...
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