Kommittébeteckning: SIS/TK 197 (Byggnadsakustik)
Källa: CEN
Svarsdatum: den 19 jun 2023
Se merSe mindre

This document specifies methods for measuring the sound pressure level from service equipment in a building or from other sound sources inside or outside of the building. This document specifically covers measurements of sanitary installations, mechanical ventilation, heating and cooling service
equipment, lifts, rubbish chutes, boilers, blowers, pumps and other auxiliary service equipment, and motor driven car park doors; however, it can also be applied to measurements of equipment or activities in in or nearby a building. To include noise from sport facilities, pubs etcetera inside or outside the
building. The measurement of noise from external sound sources generating ground-borne noise are not included in this standard.
The methods are suitable for rooms with volumes of approximately 300 m3 or less e.g. in dwellings, hotels, schools, offices and hospitals. The standard is generally not intended for measurements in large auditoriums and concert halls, nor where the source is located at a distance from the building
where sound propagation may change with weather conditions. However, the operating conditions and operating cycles in Annex B can be used in such cases.
The service equipment sound pressure level is determined as the maximum A-weighted and optionally C-weighted sound pressure level occurring during a specified operation cycle of the service equipment under test, or as the equivalent continuous sound pressure level in one–third–octave bands determined with a specified integration time. A-weighted and C-weighted values are calculated from one–third– octave–band measurements or optionally from octave–band measurements.

Kommittébeteckning: SIS/TK 170 (Luftbehandlingsteknik)
Källa: CEN
Svarsdatum: den 3 jul 2023
Se merSe mindre

This document establishes a terminology for the air filtration industry and comprises terms and definitions only.
This document is applicable to particulate matter and gas phase air filters and air cleaners used for the general ventilation of inhabited enclosed spaces. It is also applicable to air inlet filters for static or seaborne rotary machines and UV-C germicidal devices.
It is not applicable to cabin filters for road vehicles or air inlet filters for mobile internal combustion engines for which separate arrangements exist. Dust separators for the purpose of air pollution control are also excluded.

Kommittébeteckning: SIS/TK 181 (Brandsäkerhet)
Källa: CEN
Svarsdatum: den 3 jul 2023
Se merSe mindre

This part of EN 1366 specifies a test method for determining the fire resistance of smoke extraction ducts that are used for single compartment applications only. In such applications, the smoke extraction system is only intended to function up to flashover (typically 600 °C).
This method of test is only suitable for ducts constructed from non-combustible materials (euro class A1 and A2-s1, d0).
It is applicable only to four sided and circular ducts. One-, two- and three-sided ducts are not covered. This standard is applicable only for the standard sizes or smaller as described.
This test method of part 9 is applicable only to smoke extraction ducts that do not pass into other fire compartments. For smoke extraction ducts that pass into other compartments, the method of test described in EN 1366-8 is used.
The smoke extraction duct is part of the smoke extraction system which also includes smoke control dampers and smoke extract fans.

Kommittébeteckning: SIS/TK 246 (Handhållna maskiner)
Källa: ISO
Svarsdatum: den 7 jul 2023
Se merSe mindre

This document specifies the performance test method of electrically driven low-pressure air compressor packages, where the compression is performed by positive displacement or dynamic compression; utilising atmospheric air as the compression gas. Low-pressure air compressor packages are often referred to as “blowers”.
NOTE Throughout this document, the term ‘low-pressure compressor’ is used to describe a low-pressure air compressor (“blower”) package
Low-pressure compressors with and without means of controlling flow (control may be electrical (e.g. with a variable frequency drive) or mechanical or both) are covered.
This document applies to low-pressure compressors meeting all the following limits:
— Atmospheric inlet air pressure between 0,5 bara and 1,1 bara.
— Discharge vs Inlet pressure differential between 0,1 bar and 2,5 bar.
— Discharge vs Inlet pressure ratio between 1,1 and 3,5.
This document is not applicable to:
— positive displacement low-pressure compressors with a liquid in the compression element (such as liquid ring pumps and liquid injected low-pressure compressor of screw type)
— multi-stage low-pressure compressors other than multistage centrifugal compressors comprised of multiple, identical or very similar uncooled sections along a single shaft (repeating stages).
— single shaft, multistage centrifugal compressors are treated from the point of measurement and calculation as a single stage