EN 1886:2007

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Usage of real units and/or model boxes for the verification
   of mechanical performances
5 Mechanical strength of casing
   5.1 Requirements and classification
   5.2 Testing
6 Casing air leakage
   6.1 Requirements and classification
        6.1.1 Units operating under negative pressure only
        6.1.2 Units operating under both negative and
              positive pressure
   6.2 Testing
        6.2.1 Test apparatus
        6.2.2 Preparation for test
   6.3 Test procedure
   6.4 Determination of allowable leakage rates
7 Filter bypass leakage
   7.1 Requirements
        7.1.1 General
        7.1.2 Acceptable filter bypass leakage rates
        7.1.3 Two or more filter sections in the same unit
   7.2 Testing
        7.2.1 General
        7.2.2 Filters downstream of the fan (positive pressure)
        7.2.3 Filters upstream of the fan (negative pressure)
8 Thermal performance of casing
   8.1 General
   8.2 Requirements and classification
        8.2.1 Thermal transmittance
        8.2.2 Thermal bridging
   8.3 Testing
        8.3.1 General
        8.3.2 Test facility
        8.3.3 Testing procedure
        8.3.4 Evaluation of the test results
9 Acoustic insulation of casing
   9.1 General
   9.2 Test requirements
   9.3 Test method
   9.4 Test procedure
   9.5 Evaluation of the sound insertion loss D[p]
10 Fire protection
   10.1 General
   10.2 Material
   10.3 Sealings for air handling units
   10.4 Locally limited and small construction parts
        of air handling units
   10.5 Air heaters
   10.6 Filters, contact humidifiers and droplet eliminators
        of AHU's
   10.7 Heat recovery
11 Mechanical safety
Annex A (informative) - Arrangement and requirements for
                        circulating fans
Bibliography

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).NOTEHEPA 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.