EN 15665:2009

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and units
5 Needs for residential ventilation: main issues
  5.1 General
  5.2 General sources of pollutants
  5.3 Consequences of this pollution inside a dwelling
  5.4 Expectations about ventilation
6 General approach
  6.1 Questions, assumptions and way of proceeding
  6.2 Requirements for designing a ventilation system
      6.2.1 General
      6.2.2 Assumptions and criteria chosen for ventilation
            airflow rates values (level 1)
      6.2.3 Assumptions and criteria chosen for a single
            calculation representing point (level 2)
      6.2.4 Assumptions and criteria chosen for a yearly
            calculation done for design days (level 3)
7 Criteria
  7.1 General
  7.2 Threshold or limit of the level
  7.3 Weighted average concentration
  7.4 Average concentration above a threshold with limited
      compensation
  7.5 Average concentration above a limit
  7.6 Dose above a given value
  7.7 Decay criteria
  7.8 Use of criteria depending on pollutant
      7.8.1 General
      7.8.2 Criteria for humidity
      7.8.3 Criteria for specific activities
      7.8.4 Criteria for background pollutant
Annex A (informative) Example of general requirements (from
        Switzerland)
      A.1 General requirements for all ventilation systems
      A.2 Exhaust ventilation systems
          A.2.1 General
          A.2.2 Requirements for devices (only for exhaust
                ventilation systems)
          A.2.3 Mechanical Ventilation (with supply and
                exhaust fans)
      A.3 Assumptions and criteria chosen for ventilation
          airflow rates values (level 1)
          A.3.1 Exhaust ventilation systems
          A.3.2 Mechanical ventilation (with supply and
                exhaust fans)
Annex B (informative) Example of occupancy scenario

This European Standard sets out criteria to assess the performance of residential ventilation systems (for new, existing and refurbished buildings) which serve single family, multi family and apartment type dwellings throughout the year.This European Standard specifies ways to determine performance criteria to be used for design levels in regulations and/or standards. These criteria are meant to be applied to, in particular:- mechanically ventilated building (mechanical exhaust, mechanical supply or balanced system);- natural ventilation with stack effect for passive ducts;- hybrid system switching between mechanical and natural modes;- windows opening by manual operation for airing or summer comfort issues.This European Standard considers aspects of hygiene and indoor air quality. Health risk from exposure to tobacco smoke is excluded from this European Standard.