NS EN 721 : 2ED 2005

Foreword
1 Scope
2 Normative references
3 Terms and definitions
4 Requirements
  4.1 General
  4.2 Ingress of products of combustion
  4.3 Avoidance of obstructions
  4.4 Ventilator grilles
5 Minimum free area of safety ventilation, by calculation
  5.1 General
  5.2 Sizes of ventilation openings in habitation compartments
      5.2.1 Habitation compartments containing non-room-sealed
            appliances
      5.2.2 Habitation compartments greater than 10 m[2] floor
            area
      5.2.3 Other habitation compartments
6 Testing
  6.1 Preparation
  6.2 Procedure
  6.3 Test report
7 User's handbook
Annex A (normative) Warning notice

Describes the minimum safety ventilation requirements for leisure accommodation vehicles.