BS 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

Provides test procedures, requirements and classifications for air handling units which are supplying and/or exhausting air, via ductwork, for ventilating/conditioning a part or the whole of the building.