EN 13141-3-2017 pdf download.Ventilation for buildings – Performance testing of components/products for residential ventilation – Part 3:Range hoods for residential use without fan.
— the walls shall be impervious to methyl-ethyl ketone (MEK).
The range hood under test shall be installed:
— along one of the longer walls of the test room together with kitchen cabinets; and
— centrally above the hob and between wall kitchen cabinets at a height of:
— 600 mm above the hob; and
— at any other heights specified by the manufacturer.
Specific cases:
— range hoods not intended to be installed in a kitchen cabinet or between kitchen cabinets shall be tested without wall kitchen cabinets;
— island range hoods shall be tested as wall mounted range hoods.
The kitchen cabinets shall be sealed from the rest of the air in the test room. The test room shall include a ventilation opening which can he closed and an air dispersion screen. The test room shall be connected to an exhaust air duct system incorporating a shut-off valve, an airflow meter and an auxiliary fan. The desired airflow rate, in accordance with the manufacturer specification, shall be achieved using the auxiliary fan. The test room, kitchen cabinets, ventilating opening and associated screen, together with the layout, are shown in Figure 2.
When testing range hoods, measures should be taken to prevent the inlet air from being contaminated with methyl-ethyl ketone (MEK) from the outlet air.
A disturbing element (see Figure 3) which work in an intermittently way is used to simulate a real situation with air movements in the kitchen. The disturbing element shall have a width of (500 ± 2) mm and a height of (1 000 ± 2) mm. The distance between the disturbing elements middle point and the floor shall be (1 000 ± 2) mm and the distance to the wall shall be (1 000 ± 2) mm. The disturbing element shall be moved from one end to the other every 4 s with a constant speed of 0,5 m/s, except the acceleration and deceleration within the first 100 mm from each end position.
A pan, see Figure 4, with a diameter of (200 ± 20) mm with copper base and a height of (45 ± 2) mm, is placed on the front, left-hand hob element, having the same base diameter as the pan. The temperature in the base of the pan, 40 mm from its side, shall be maintained at 170 °C ± 5°C.
The concentration of methyl-ethyl ketone (MEK) shall be detected using four sampling points each separated by 500 mm vertically, as shown in Figure 2. The detection equipment for measuring the methyl-ethyl ketone (MEK) concentration shall be located outside the room. An example of tubes suitable to link the sampling points to the measuring equipment is the following:
PTFE tubes with the following characteristics:
— 2,5 mm in diameter; and
— of equal length; and
— connected to each other.
The characteristics of the test room are established without the range hood being operated. The auxiliary fan shall be switched off, the ventilating opening and the shut-off valve closed.
100 g of a solution containing (12 ± 0,1) g of methyl-ethyl ketone (MEK) in (300 ± 1) g of distilled water shall be continually dripped onto the pan at such a rate that all the solution shall be used after 10 mm. The solution shall be evenly dispersed throughout the room by means of a fan.
The concentration of methyl-ethyl ketone (MEK) in the test room (Ci) shall be measured at the end of the application period. The concentration C, can be measured without range hood being installed.
The test room is considered to be adequately sealed if the concentration of methyl-ethyl ketone (MEK) in the test room drops by less than 5 % 1 h after the solution has been distributed.
The test room is ventilated until the concentration of methyl-ethyl ketone (MEK) is less than 1 % of C,.
The range hood shall be operated and the methyl-ethyl ketone (MEK) solution dripped onto the heated pan so that 100 g of the solution has evaporated within (600 ± 5) s. The auxiliary fan shall he switched off, the ventilating opening closed, the shut-off valve closed and a fan having an airflow of (70 ± 14)1/s positioned on the centre of the floor operated. The concentration of methyl-ethyl ketone (MEK) in the test room (C2) shall be measured when the value has stabilized.
The odour reduction factor (Or) is calculated in percent using Formula (1).EN 13141-3-2017 pdf download.