TP053 - Pravilnik o prezračevanju in klimatizaciji stavb

This document specifies the test equipment and the test methods used for measuring the gravimetric efficiency and resistance to air flow of air filter for general ventilation.
It is intended for use in conjunction with ISO 16890-1, ISO 16890-2 and ISO 16890-4.
The test method described in this document is applicable for air flow rates between 0,25 m3/s (900 m3/h, 530 ft3/min) and 1,5 m3/s (5 400 m3/h, 3 178 ft3/min), referring to a test rig with a nominal face area of 610 mm × 610 mm (24 in × 24 in).
This document refers to particulate air filter elements for general ventilation having an ePM1 efficiency less than or equal to 99 % and an ePM10 efficiency greater than 20 % when tested as per the procedures defined in the ISO 16890 series.
NOTE            The lower limit for this test procedure is set at a minimum ePM10 efficiency of 20 % since it is very difficult for a test filter element below this level to meet the statistical validity requirements of this procedure.
This document does not apply to filter elements used in portable room-air cleaners.

This document specifies methods for the testing and rating of dampers and valves used in air distribution systems with pressure differences up to 2 000 Pa.
The tests incorporated in this document will address:
-   leakage past a closed damper or valve (for classification, see Annex C);
-   casing leakage (for classification, see Annex C);
-   flow rate/pressure requirement characteristics;
-   torque: (see Annex A);
-   thermal transmittance: (see Annex B).
The tests specified above are applicable to the following:
-   measurement of leakage past a closed damper or valve;
-   measurement of casing leakage;
-   determination of flow rate and pressure requirements;
-   measurement of torque characteristics (see Annex A);
-   measurement of thermal transfer characteristics to determine insulation properties (see Annex B).
This document does not apply to the acoustic testing of dampers and valves.
NOTE   Certain aspects of the dynamic performance of dampers and/or valves are dependent upon the air distribution system to which they are connected and are, therefore, difficult to measure in isolation. Such considerations have led to the omission of these aspects of the dynamic performance measurements from this document. Also, in common with other air distribution components, the results from tests carried out in accordance with this document might not be directly applicable if the damper or valve is situated in an area of non-uniform flow.

This European Standard describes a standard method for determining the PM10 or PM2,5 mass concentrations of suspendedparticulate matter in ambient air by sampling the particulate matter on filters and weighing them by means of a balance.
Measurements are performed with samplers with inlet designs as specified in Annex A, operating at a nominal flow rate of 2,3 m3/h,over a nominal sampling period of 24 h. Measurement results are expressed in μg/m3, where the volume of air is the volume atambient conditions near the inlet at the time of sampling.
The range of application of this European Standard is for 24 h measurements from approximately 1 μg/m3 (i.e. the limit of detection ofthe standard measurement method expressed as its uncertainty) up to 150 μg/m3 for PM10 and 120 μg/m3 for PM2,5.
This European Standard describes procedures and gives requirements for the testing and use of so-called sequential samplers,equipped with a filter changer, suitable for extended stand-alone operation. Sequential samplers are commonly used throughout theEuropean Union for the measurement of concentrations in ambient air of PM10 or PM2,5. However, this European Standard does notexclude the use of single-filter samplers.
This European Standard represents an evolution of earlier European Standards (EN 12341:1998 and 2014, EN 14907:2005). Newequipment procured shall comply fully with this European Standard.
Older versions of these samplers, including those described in EN 12341:2014 Annex B, have a special status in terms of their use. These samplers can still be used for monitoring purposes and for ongoing quality control, provided that a well justified additionalallowance is made to their uncertainties
This European Standard also provides guidance for the selection and testing of filters with the aim of reducing the measurementuncertainty of the results obtained when applying this European Standard.

This standard applies to the natural ventilation and fan-assisted ventilation of residential buildings,
dwellings and similarly used units which are predominantly used for living purposes, including halls of
residence, retirement homes and nursing homes, and similar institutions during the heating period and throughout the entire year in basements (see Annex F) in residential buildings.
The ventilation concept specified in Clause 4 and Clause 5 applies to new buildings and to existing buildings in which modifications are made relevant to the ventilation regime. Where there is no moisture-protection ventilation, or if additional requirements (e. g. noise protection, hygiene, air quality, etc.) are to be taken into consideration, then suitable ventilation measures are suggested in Clauses 7 to 9.
In Clauses 6 to 9 this standard specifies requirements for natural ventilation systems (cross ventilation, shaft ventilation), fan-assisted ventilation systems, and combinations thereof, taking into consideration the maintenance of the necessary indoor air quality while ensuring moisture protection.
Ensuring ventilation for the purposes of moisture protection by manually opening windows is not covered by this standard. Manual opening of windows is taken into consideration for ventilation levels that are not explicitly designed for.
This standard specifies requirements on the planning, design and commissioning, and the operation and maintenance of the required ventilation components and/or units for natural ventilation systems and fan-assisted ventilation systems with user-independent moisture protection in each case, making due allowance for aspects of construction engineering physics, ventilation, hygiene and energy utilization.
The design recommendations of this standard apply for dwellings with low emissions of harmful substances.Unduly high emissions from the building and in the building environment may require additional measures.
This standard does not apply to active cooling1 air treatment methods nor to active humidification and dehumidification.
As regards the ventilation of windowless rooms, the Bauaufsichtliche Richtlinie über die Lüftung fensterloser Küchen, Bäder und Toilettenräume (Code of practice on ventilation of windowless kitchens, bathrooms and toilet rooms) and DIN 18017-3 apply to the ventilation of windowless kitchens, bathrooms and WCs in dwellings

This document specifies the aerosol production, the test equipment and the test methods used for measuring fractional efficiency and air flow resistance of air filters for general ventilation.
It is intended to be used in conjunction with ISO 16890‑1, ISO 16890‑3 and ISO 16890‑4.
The test method described in this document is applicable for air flow rates between 0,25 m3/s (900 m3/h, 530 ft3/min) and 1,5 m3/s (5 400 m3/h, 3 178 ft3/min), referring to a test rig with a nominal face area of 610 mm × 610 mm (24.0 inches × 24.0 inches).
This document refers to particulate air filter elements for general ventilation having an ePM1 efficiency less than or equal to 99 % and an ePM10 efficiency greater than 20 % when tested as per the procedures defined within the ISO 16890 series.
NOTE      The lower limit for this test procedure is set at a minimum ePM10 efficiency of 20 % since it is very difficult for a test filter element below this level to meet the statistical validity requirements of this procedure.
This document is not applicable to filter elements used in portable room-air cleaners.

This document establishes a conditioning method to determine the minimum fractional test efficiency.
It is intended to be used in conjunction with ISO 16890‑1, ISO 16890‑2 and ISO 16890‑3, and provides the related test requirements for the test device and conditioning cabinet as well as the conditioning procedure to follow.
The conditioning method described in this document is referring to a test device with a nominal face area of 610 mm × 610 mm (24 inches × 24 inches).
This document refers to particulate air filter elements for general ventilation having an ePM1 efficiency less than or equal to 99 % and an ePM10 efficiency greater than 20 % when tested according to the procedures defined within the ISO 16890 series.
NOTE      The lower limit for this test procedure is set at a minimum ePM10 efficiency of 20 % since it will be very difficult for a test filter element below this level to meet the statistical validity requirements of this procedure.
Filter elements used in portable room-air cleaners are excluded from the scope of this document.

This document specifies aerodynamic, acoustic and electrical power performance test methods for unidirectional ventilation units used in residential ventilation systems.
This document is applicable to ventilation units:
-   installed on a wall or in a window without any duct, A category;
-   installed in the upstream of a duct, B category;
-   installed in the downstream of a duct, C category;
-   installed in a duct, or with duct connection upstream and downstream, D category;
-   with one or several inlets/outlets;
-   installed in a system with a heat pump for domestic hot water or water for cooling or heating;
-   which can be used for supply or exhaust.
This document does not apply to:
-   fan assisted cowls which are tested according to EN 13141-5;
-   mechanical supply and exhaust units which are tested according to EN 13141-7:2021 or EN 13141 8:2021.

This document specifies the laboratory test methods and test requirements for the testing of aerodynamic, thermal, acoustic and electrical performance characteristics of ducted mechanical supply and exhaust residential ventilation units.
NOTE   Such units are referred to as bidirectional ventilation units in EN 13142:2021.
This document is applicable to unit that contain at least, within one or more casing:
-   fans for mechanical supply and exhaust;
-   air filters;
-   air-to-air heat exchanger and/or air-to-air heat pump for air heat recovery;
-   control system.
Such unit can be provided in more than one assembly, the separate assemblies of which are designed to be used together.
Examples of different possible arrangements of heat recovery, heat exchangers and/or heat pumps are described in Annex A.
This document covers ventilation units with continuous mass flows for each setting point.
This document does not deal with non-ducted units that are treated in prEN 13141-8:2021.
This document does not cover ventilation systems that may also provide water space heating and hot water that are treated in EN 16573.
This document does not cover units including combustion engine driven compression heat pumps and absorption heat pumps.
Electrical safety requirements are given in EN 60335-2-40 and EN 60335-2-80.

This document specifies and classifies the component/product performance characteristics, which may be necessary for the design, rating and dimensioning, placing on the market of residential ventilation products and systems to provide the predetermined performance, comfort conditions of temperature, air velocity, humidity, hygiene and sound in the occupied zone.
It defines those performance characteristics (mandatory or optional) which shall be determined, measured and presented according to relevant test methods. It provides a classification scheme, which leads to a full definition of product properties based on test methods described in various EN Standards, and gives an overview of the test standards. Distinction between mandatory and optional requirement is left to each European and national regulations.
The codification part in Annex B and the classification part in Clause 8 apply to the following products:
-   unidirectional mechanical supply and exhaust residential ventilation units according to EN 13141-4:2021, EN 13141-6:2014 and EN 13141-11;
-   ducted mechanical bidirectional residential ventilation units according to EN 13141-7:2021;
-   non-ducted mechanical bidirectional residential ventilation units according to prEN 13141 8:2020.
This document does not apply to other products such as filters, fire dampers, ducts, control devices and sound attenuators, which may also be incorporated in residential ventilation.
This European Standard specifies in Annex ZA and Annex ZB the requirements of EU 1253/2014 and EU 1254/2014 for residential ventilation units below 1 000 m3/h air volume flow.
This European Standard does not cover requirements raised by European Directives (e.g. low voltage directive, EMC directive) and other requirements such as corrosion, reaction to fire and snow penetration.

This document specifies methods for measuring:
-   the aerodynamic characteristics of cowls, fan assisted cowls and roof outlets;
-   the electrical and acoustic characteristics of fan assisted cowls.
This document is applicable to cowls, assisted cowls and roof outlets used in natural, hybrid or mechanical ventilation and that are meant to be fitted onto ducts which project above the roof surface.
This document does not apply to:
-   assisted cowls assisted by a device other than a fan (e.g. injection assisted cowls);
-   roof exhaust fans (see EN 13141-4).

This document specifies requirements and testing for rating and performance of Non Residential Ventilation Units, NRVU’s, specifically Air Handling Units (AHU’s). It specifies requirements, classifications and testing of components and sections of air handling units.
This document applies to tests in a laboratory and in situ. This document is applicable both for mass produced air handling units and tailor-made Air Handling Units.
This document applies to AHU and individual sections of AHU with the designed air flow > 250 m3 · h−1. This document applies to UVU's with additional air treatment components in addition to filtration.
This standard does not include:
-   residential unidirectional and bidirectional ventilation units;
-   nonresidential unidirectional ventilation units which consist of only a casing, a fan with or without filter.
NOTE 1   Residential ventilation units are covered by EN 13142.
NOTE 2   Nonresidential unidirectional ventilation units which consists only casing, fan with or without filter are covered by EN 17291.

This document specifies laboratory methods for testing externally and internally mounted air transfer devices operating under pressure differences.
This document applies to air transfer devices of the following types:
- air transfer devices with fixed opening(s);
- air transfer devices with manually adjustable opening(s);
- air transfer devices with pressure difference controlled opening(s);
- window openings specifically designed to act as an air transfer device.
This document describes tests intended to characterize the following:
- flow rate/pressure;
- equivalent area
- reverse flow ability;
- air tightness when closed;
- free area;
- air diffusion in the occupied zone;
- sound insulation;
- water tightness.
This document does not apply to evaluation of:
- air filtration;
- condensation risk;
- noise production.

This document specifies methods for measuring the main performance characteristics of range hoods for residential use. It applies to air extraction range hoods without fan.
This document does not specify:
-   values for performance characteristics;
-   safety requirements in relation with the use of methyl-ethyl ketone (MEK).
For air extraction range hoods with fan see IEC 61591

ISO 16890-1:2016 establishes an efficiency classification system of air filters for general ventilation based upon particulate matter (PM). It also provides an overview of the test procedures, and specifies general requirements for assessing and marking the filters, as well as for documenting the test results. It is intended for use in conjunction with ISO 16890‑2, ISO 16890‑3 and ISO 16890‑4.
The test method described in this part of ISO 16890 is applicable for air flow rates between 0,25 m3/s (900 m3/h, 530 ft3/min) and 1,5 m3/s (5 400 m3/h, 3 178 ft3/min), referring to a test rig with a nominal face area of 610 mm × 610 mm (24 inch × 24 inch).
ISO 16890 (all parts) refers to particulate air filter elements for general ventilation having an ePM1 efficiency less than or equal to 99 % when tested according to the procedures defined within ISO 16890‑1, ISO 16890‑2, ISO 16890‑3 and ISO 16890‑4. Air filter elements with a higher initial efficiency are evaluated by other applicable test methods (see ISO 29463-1, ISO 29463-2, ISO 29463-3, ISO 29463-4 and ISO 29463-5).
Filter elements used in portable room-air cleaners are excluded from the scope of this part of ISO 16890.
The performance results obtained in accordance with ISO 16890 (all parts) cannot by themselves be quantitatively applied to predict performance in service with regard to efficiency and lifetime. Other factors influencing performance to be taken into account are described in Annex A.

This European Standard specifies laboratory methods for measuring the aerodynamic and acoustic performance characteristics and energy consumption of assembled exhaust ventilation system packages for a single dwelling. If a component of the package is not physically linked to the others (e.g. air inlets), then it is assumed to have been tested according to the test method related to this component. An example of a typical exhaust package is given in Figure 2.
The object of this European Standard is to provide tested characteristics for a ventilation system package in worst case conditions. It is assumed that better values are achieved on site when the ventilation system package is installed in accordance with the manufacturer's instruction and within the limits of the test conditions given in this standard.
Safety requirements are given in EN 60335-2-80.

This European Standard specifies dimensions of ducts and duct fittings with circular cross- section. It applies to ductwork used in ventilating and air conditioning systems in buildings, subject to human occupancy. The wall thickness of ducts and fittings is not specified in this standard; strength and leakage are dealt with in EN 12237 [2].
The corresponding standard for rectangular ducts is EN 1505 [1].

This European Standard specifies checks, test methods and measuring instruments in order to verify the fitness for purpose of the installed systems primarily for handing over which will be partially performed before, during and after handing over.
This European Standard enables the choice between simple test methods, when sufficient, and extensive measurements, when necessary.
This European Standard applies to mechanically operated ventilation and air conditioning systems as specified in EN 12792 and comprising any of the following:
-   air terminal devices and units,
-   air handling units,
-   air distribution systems (supply, extract, exhaust),
-   fire protection devices,
-   automatic control devices.
When the system is set, adjusted and balanced measurement methods described in this European Standard apply.
This European Standard does not apply to:
-   heat generating systems and their control,
-   refrigerating systems and their control,
-   distribution of heating and cooling medium to the air handling units,
-   compressed air supplying systems,
-   water conditioning systems,
-   central steam generating systems for air humidifying,
-   electric supply systems.
This European Standard applies to ventilation and air conditioning systems designed for the maintenance of comfort conditions in buildings. It is not applicable in the case of systems for the control of industrial or other special process environments. In the latter case, however, it may be referred to if the system technology is similar to that of the above mentioned ventilation and air conditioning systems.
This European Standard does not include any requirements concerning the installation contract. However, in order to facilitate the application of this standard, the installation contract should refer to the provisions which are listed in Annex F.
The measuring methods in this European Standard can be used in the frame of the energy inspection of air-conditioning systems according to EU Directive 2010/31/EU "Energy performance of buildings Directive" (see EN 15239, EN 15240).
This European Standard may be used for residential and dwelling ventilation systems.

This European Standard specifies laboratory methods for testing exhaust and supply air terminal devices operating under pressure differences.
It applies to devices used in mechanical and natural residential ventilation systems, of the following types:
-   device with a manually adjustable opening; or
-   device with a fixed opening; or
-   pressure difference controlled device.
It describes tests intended to characterize:
-   flow rate/pressure;
-   air diffusion characteristics (for supply air terminal devices);
-   noise production for components of systems;
-   insertion loss of component of systems;
-   sound insulation.

This European standard specifies requirements for dimension, shape and location for access panels for cleaning and service in ductwork systems, which conform to EN 1505, EN 1506 and EN 13180.
National regulations shall always be followed, even when they deviate from requirements given in this standard.

This Technical Report specifies recommendations for the performance and design of ventilation systems which serve single family, multi family and apartment type dwellings during both summer and winter. It is of particular interest to architects, designers, builders and those involved with implementing national, regional and local regulations and standards.
Four basic ventilation strategies are covered; natural ventilation, fan assisted supply air ventilation, fan assisted exhaust air ventilation and fan assisted balanced air ventilation. Combinations of these systems are not excluded and a ventilation system may serve only one dwelling (individual system) or more than one dwelling (central system). The ventilation aspects of combined systems (ventilation with heating and/or cooling) are covered.
The ventilation of garages, common spaces, roof voids, sub-floor voids, wall cavities and other spaces in the structure, under, over or around the living space are not covered.
Ventilation systems covered by this Technical Report may affect the entry and dilution of radon and other gases from the ground but these effects are not covered in this Technical Report. Ventilation systems designed to reduce the entry of radon and other gases from the ground are not covered by this Technical Report.

The European Standard applies to rectangular ductwork of sheet metal used in air conditioning and ventilation systems defined in the principal scope of CEN/TC 156.

This standard specifies the main characteristics of air velocity measuring devices. This includes requirements for thermal velocity probes, recalibration and the signal processing of measurements in a ventilated space, including  those in the air jet and in the occupied zone.  Other types of velocity measuring devices should fulfil the performance parameters stated but appropriate calibration techniques should not necessarily be used which are described in this standard

This European Standard specifies the basic requirements and characteristics for ductwork made of insulation ductboards and used in ventilation and air conditioning systems of buildings subject to human occupancy. This standard does not specify the fire reaction classification for different types of ductboards.

TC - German Version only, new graphics

This standard specifies requirements and test methods for strength and air leakage of circular ductwork used in air conditioning and ventilation systems in buildings.
The standard is intended to establish the mechanical strength and leakage required to verify the fitness for the intended service as installed ductwork.
The standard is primarily intended for in-situ measurements, but provisions are also made for its use in laboratory testing. The requirements and methods are applicable also to rectangular ductwork in respect of air leakage.

This standard specifies requirements for the construction and application of supports for sheet metal ductwork in ventilation and air conditioning systems.
The standard applies to any shape of ductwork (rectangular, circular and oval), and components used in ventilation and air conditioning systems in buildings.
The standard also takes into account insulation loads, safety factors, imposed loads (cleaning and maintenance), vibration isolation, and corrosion resistance.
The standard does not consider loading due to earthquakes.
The standard does not deal with fire requirements and fire protection of ducts and support systems.

This standard specifies requirements and test methods for the technical characteristics of flexible ducts used in ventilation and air conditioning installations in buildings for human occupancy.
This standard identifies the following parameters which shall be tested or inspected:
- dimensions and tolerances;
- mechanical resistance.
Acoustic, thermal, reaction to fire, and pressure loss properties of flexible ducts are not covered in this standard.

This European Standard specifies a method for measuring the sand rejection efficiency of sand trap louvres subject to simulated sand and with inlet air flow through the louvre under test. The Standard considers a 1000 mm ´ 1000 mm section of sand trap louvre, or the nearest possible blade increment, for evaluation purposes.
The purpose of the tests incorporated in this European Standard is as follows:
a) Sand Rejection Effectiveness
To establish the sand rejection effectiveness when subjected to various air flow rates through the assembly.
b) Entry loss coefficient/Pressure requirements
To establish the air pressure loss through the sand trap louvre at various air flow rates and by calculation Discharge Loss Coefficient.

This European Standard specifies methods for the laboratory aerodynamic testing and rating of low velocity air terminal devices for displacement flow applications, including the specification of suitable test facilities and measurement techniques.
The standard gives only tests for the assessment of characteristics of the air terminal devices under non-isothermal conditions.
This standard applies to Class IV air terminal devices as defined in EN 12238.

This European Standard specifies a method for measuring the water rejection performance of louvres subject to simulated rain and wind pressures, both with and without air flow through the louvre under test. For the purpose of tests in this standard, a 1000 mm ´ 1000 mm section of weather louvre or the nearest possible blade increment is considered.
Weather louvres are designed to restrict the passage of water during rainfall while allowing the passage of air into or from an air distribution system or part of a building. They are used in a wide range of applications, where there may be differences in wind speed and direction, levels of local turbulence, rate and droplet size, distribution of rainfall and surface water flow from the surrounding structure. It is impractical to consider a standard test procedure simulating the whole range of likely conditions, but this standard provides for heavy rainfall directed on to the louvre surface, with simulated wind pressures. This provides a common basis on which to compare the water rejection performance of weather louvres of different designs. This standard is not intended for the evaluation of weather performance of pressure relief dampers.
The purpose of tests incorporated in this European Standard is as follows:
a) Weather tests
To establish the weather louvre effectiveness when subjected to wind pressure at various air flow rates.
b) Discharge and Entry loss coefficient/Pressure requirements
To establish the air pressure loss through the weather louvre at various air flow rates and by calculation the Discharge and Entry Loss Coefficient.

This European Standard specifies structural classifications for floor mounted Air Terminal Devices (ATD's) in respect of their possible applications and the following related structural test methods: Static test methods. Impact test methods. Dynamic test methods.
Electrical continuity requirements for platform raised floor systems and components are not covered in this standard.
Requirements for aerodynamic and acoustic testing of air terminal devices are not covered in this standard.
The standard does not deal with any simulations relating to the wear characteristics of Air Terminal Devices.

This European Standard specifies methods for the laboratory aerodynamic testing and rating of air terminal devices for mixed flow applications, including the specification of suitable test facilities and measurement techniques.
The standard gives only tests for the assessment of characteristics of the air terminal devices under isothermal conditions.
The testing of low velocity air terminal devices is specified in EN 12239.

This European Standard specifies methods for the aerodynamic testing and rating of constant and variable flow rate terminal units suitable for use with air distribution systems.
The terminal units considered are:
- Single and dual duct.
- Induction.
- Fan assisted induction (parallel and series).
- Single duct with integral diffuser.
The tests for each type of unit are summarized in Figure 1.
The tests in this standard are designed to determine fully the aerodynamic performance of terminal units and provide a basis for the comparison of the suitability of such assemblies when correctly installed in an air distribution system.

This European Standard specifies dimensional characteristics of circular flanges for sheet metal ductwork. It applies to ductwork used in ventilating and air conditioning systems in buildings, subject to human occupancy.  For flange dimensions of industrial fans see ISO 6580 and ISO 13351.

This European Standard specifies dimensions of sheet metal air ducts and duct fittings with rectangular cross section. It applies to ductwork used in ventilation and air conditioning systems in buildings subject to human occupancy. The wall thickness of ducts and fittings is not specified in this standard; strength and leakage are dealt with in prEN 1507. The corresponding standard for circular ducts is prEN 1506.

ISO 7730:2005 presents methods for predicting the general thermal sensation and degree of discomfort (thermal dissatisfaction) of people exposed to moderate thermal environments. It enables the analytical determination and interpretation of thermal comfort using calculation of PMV (predicted mean vote) and PPD (predicted percentage of dissatisfied) and local thermal comfort, giving the environmental conditions considered acceptable for general thermal comfort as well as those representing local discomfort.

This standard specifies test methods, test requirements and classifications for air handling units, which are supplying and/or extracting air via a ductwork ventilating/conditioning a part or the whole of the building. This standard is not applicable to the following:
a)   air conditioning units serving a limited area in a building, such as fan coil units;
b)   units for residential buildings;
c)   units producing ventilation air mainly for a manufacturing process.
Except for the thermal and acoustic performance of the casing, the test methods and requirements are applicable to both complete units and any separate sections.
The filter bypass test is not applicable to the testing of high efficiency particulate air filters (HEPA).
NOTE   HEPA filters are recommended to be installed downstream of the air handling unit. Such installations should be leak tested in accordance with the appropriate filter standards.
The test method for the thermal performance of the casing is applicable to the comparison of different constructions, but not to the calculation of thermal losses through casing or the risk of condensation.
Similarly, the test method for the acoustic performance of the casing is applicable to the comparison of different constructions, but not to the provision of accurate acoustic data for specific units.

This European Prestandard specifies the requirements for, and methods of expressing the quality of the indoor environment for the design, commissioning, operation and control of ventilation and air-conditioning systems. For the purposes of this prestandard, the indoor environment comprises the thermal environment, the air quality and the acoustic environment. This prestandard covers indoor environments where the major concern is the human occupation but excludes dwellings.

This European Standard refers to particulate air filters for general ventilation. These filters are classified according to their performance as measured in this test procedure.
This European Standard contains requirements to be met by particulate air filters. It describes testing methods and the test rig for measuring filter performance.
In order to obtain results for comparison and classification purposes, particulate air filters shall be tested against two synthetic aerosols, a fine aerosol for measurement of filtration efficiency as a function of particle size within a particle size range 0,2 m to 3,0 m, and a coarse one for obtaining information about test dust capacity and, in the case of coarse filters, filtration efficiency with respect to coarse loading dust (arrestance).
This European Standard applies to air filters having an initial efficiency of less than 98 % with respect to 0,4 µm particles. Filters shall be tested at an air flow rate between 0,24 m3/s  (850 m3/h) and 1,5 m3/s (5400 m3/h).
The performance results obtained in accordance with this standard cannot by themselves be quantitatively applied to predict performance in service with regard to efficiency and lifetime. Other factors influencing performance to be taken into account are described in Annex A (informative).