IS 18794 : 2024 Air Handling Units - Specification
| ICS 23.120; 91.140.30 | MED 03 |
1 SCOPE
1.1 This standard specifies general, performance, rating requirements, and method of tests for air handling units (AHU).
1.2 This standard covers units with rated voltage up to and including 240 V, 50 Hz a.c., single-phase and up to and including 415 V, 50 Hz a.c. for three-phase input power supply.
1.3 This standard is applicable to the following:
a) The standardized designs, which may be in a range of sizes having common construction;
b) The custom designs with and without heat recovery devices;
c) The units producing ventilation air, including a dedicated outdoor system (DOAS); and
d) Site assembled AHUs which are installed under factory personnel supervision while ensuring compliance to mechanical and thermal performance as specified in this standard.
1.4 This standard does not cover the following:
a) Fan coil units;
b) Control system;
c) Application in the explosive environment;
d) Health and hygiene applications; and
e) Site assembled AHUs except 1.3(d).
2 REFERENCES
The standards listed in Annex A contain provisions which, through reference in this text, constitute provisions of this standard. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agreements based on this standard are encouraged to investigate the possibility of applying the most recent edition of these standards.
| IS/Other Standards | Title |
| IS 3615 : 2020 | Glossary of terms used in refrigeration and air conditioning (second revision) |
| IS 9844 : 1981 | Methods of testing corrosion resistance of electroplated and anodized aluminium coatings by neutral salt spray test |
| IS 17570 | Air filters for general ventilation: |
| (Part 1) : 2021/ISO 16890-1 : 2016 | Technical specifications, requirements and classification system based upon particulate matter efficiency (ePM) |
| (Part 2) : 2021 | Measurement of fractional efficiency and air flow resistance (ISO 16890-2 : 2016, MOD) |
| (Part 3) : 2021/ISO 16890-3 : 2016 | Determination of the gravimetric efficiency and the air flow resistance versus the mass of test dust captured |
| (Part 4) : 2021/ISO 16890-4 : 2016 | Conditioning method to determine the minimum fractional test efficiency |
| ISO 3744 : 2010 | Acoustics - Determination of sound power levels and sound energy levels of noise sources using sound pressure - Engineering methods for an essentially free field over a reflecting plane |
| ISO 5801 : 2017 | Fans - Performance testing using standardized airways |