If you’re starting a new project, the first step is to set objectives for the comfort and health of you and your family, while also bearing in mind your future needs and the wellbeing of people who will live in the house after you.
- Temperature. I want living areas to remain between 20°C and 25°C year round and the sleeping areas to be between 18°C and 21°C.
- Humidity. I want humidity levels throughout the house to stay below 70%.
- Ventilation. I want bathroom extractors to have a ventilation rate of more than 60m³ per hour.
- Airtightness. If only manual ventilation is used, I want no more than 3 air changes per hour (ACH).
- Materials. I only want to use paints with less than 60 VOC grams per litre.
- I want to avoid the use of artificial light during daytime.
- I want a quiet home office that allows me to be productive in spite of the children playing nearby.
- I want bedrooms to face the quieter side of the property so external noise won’t disturb us at night.
How does it
address comfort and health objectives?
Comfort and health
There are several clauses in the Code that relate to comfort and
health which aim to ensure that people who use the buildings can do so safely
and without endangering their health:
E3 focuses on internal moisture.
G4 includes considerations around ventilation.
G6 discusses airborne and impact sound.
G8 talks about artificial light.
H1 focuses on energy efficiency and contains minimum R-values for different
components of the thermal envelope.
Performance targets are not set for residential buildings within the
Buildings need to ensure all occupied spaces have operable windows.
Each project must create an interior environment plan that demonstrates
compliance with a number of international standards and explains how it will
achieve an exemplary indoor environment.
Specifies all the materials that have to be avoided during
Red List includes 22 materials and chemicals that can’t be used in the
Net Zero Energy
There are no mandatory comfort and health considerations as part of
the Net Zero Energy certification.
comfort and health are combined in the weightiest category of the tool, which
accounts for 48% of the total points.
mostly on thermal performance from a whole-of-house perspective. Also
includes considerations around moisture control, sound insulation and
does not set explicit performance targets around comfort and health.
Heating and cooling demand and airtightness test results are two of
the three key standards that need to be met to achieve certification.
To meet the specified heating and cooling demand, buildings are
expected to remain between 20°C and 25°C throughout the year.
Additionally, there are requirements around surface temperature,
thermal bridging and air flow rates that must be achieved.
All occupied spaces must have operable windows
and projects must demonstrate compliance with a number of international
standards on indoor environmental quality. All mechanical ventilation systems
must work inaudibly and draught-free.
Buildings need to achieve comfortable temperatures (20°C–25°C) with a
heating and cooling energy demand of less than 15kWh/(m²yr) or a peak heating
load of less than 10kWh/m².
Relative humidity should be within a range of 30%–70%.
Result of the airtightness test (also known as the blower door test;
see below) needs to demonstrate less than 0.6 air changes per hour.
High Standard of
addition to including quantitative targets around temperatures and humidity,
the HSS includes a checklist of design features aimed at improving indoor
need to comply with the following temperature and humidity levels:
- living rooms temperature in winter
- bedrooms temperature in winter >16°C
- living rooms relative humidity in winter:
- bedrooms relative humidity in winter: 40%–70%