PREN 1886 : DRAFT 2003

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Usage of real units and/or model boxes for the
   verification of the 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
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
11 Mechanical safety

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