Airtightness of apartments - Build 180(2020)

Abbreviation
Airtightness of apartments
Valid from
1/10/2020

Information provider
BRANZ Limited,
Information type
BUILD article,
Format
Website, PDF,

Description

Recent BRANZ research into the airtightness of apartment buildings has prompted a shift in thinking around airtightness and ventilation. BRANZ now recommends that residential buildings are mechanically ventilated and are built to an airtightness target.

The airtightness of a building is a measure of how much air flows between indoors and outdoors through the structure itself – in other words, how big the holes are in the structure.

Airtightness is a key aspect of a building’s performance, affecting the energy efficiency, thermal comfort and indoor air quality. However, airtightness is only mentioned indirectly in the New Zealand Building Code, and there is no requirement to meet a particular target level of airtightness.

Scope

This article includes:

  • BRANZ tested a range of apartments
    • Airtightness similar to new standalone houses
    • Airtightness ranged from 1.9–12.6 ach
  • Many homes underventilated
  • Aim for 3 ach @ 50 Pa
  • Move to mechanical ventilation
  • Only small improvement needed
  • Resources to help achieve airtightness
  • Dealing with air leakage
  • A different approach
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For assistance with locating previous versions, please contact the information provider.
This resource is not cited by any other resources.

Airtightness of apartments - Build 180(2020)

This document is not CITED BY any other resources:

Airtightness of apartments - Build 180(2020)

Description

Recent BRANZ research into the airtightness of apartment buildings has prompted a shift in thinking around airtightness and ventilation. BRANZ now recommends that residential buildings are mechanically ventilated and are built to an airtightness target.

The airtightness of a building is a measure of how much air flows between indoors and outdoors through the structure itself – in other words, how big the holes are in the structure.

Airtightness is a key aspect of a building’s performance, affecting the energy efficiency, thermal comfort and indoor air quality. However, airtightness is only mentioned indirectly in the New Zealand Building Code, and there is no requirement to meet a particular target level of airtightness.

View on Information Provider website Download this resource (PDF, 8.2MB)
Airtightness of apartments - Build 180(2020)
Description

Recent BRANZ research into the airtightness of apartment buildings has prompted a shift in thinking around airtightness and ventilation. BRANZ now recommends that residential buildings are mechanically ventilated and are built to an airtightness target.

The airtightness of a building is a measure of how much air flows between indoors and outdoors through the structure itself – in other words, how big the holes are in the structure.

Airtightness is a key aspect of a building’s performance, affecting the energy efficiency, thermal comfort and indoor air quality. However, airtightness is only mentioned indirectly in the New Zealand Building Code, and there is no requirement to meet a particular target level of airtightness.

View on Information Provider website Download this resource (PDF, 8.2MB)
This resource does not cite any other resources.

Airtightness of apartments - Build 180(2020)

This resource does not CITE any other resources.
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