Page 49 - Build 152

Ventilation
Survey questionnaires and sensors will be used to study up to 100 homes. Data will be collected on how often windows are opened, whether internal doors are closed or open and the temperature and relative humidity in up to four locations in each house.
Homes from across New Zealand will be studied to capture any climatically driven di erences in behaviour. Each sensor will contain a single temperature, relative humidity and motion sensor.
Room temperatures, relative humidities and ventilation behaviour in the winter is of primary interest, but some homes will also be looked at over the summer. Homes will be monitored for up to 6 months. During this time, occupants will have access to the real-time temperature and relative humidity data.
Lead to better ventilation design
The data collected from windows and internal doors will be used to derive a statistical model that will enable determination of the likelihood that a certain event occurs given indoor and outdoor climate data.
Being able to predict the circumstances under which a certain behaviour occurs will aid in the design of better ventilation systems. ‘Better’ in this instance means achieving better indoor air quality using less energy.
Part of a wider global project
To get a critical mass of researchers to help analyse the data and develop the models, BRANZ has joined an international group of researchers working on a larger project of occupant behaviour. This is under the umbrella of the International Energy Agency.
Our study will provide the temperature and humidity pro le of residential homes across New Zealand. This will give us an insight into what indoor climate New Zealanders are experiencing and identify potential shortcomings in the quality of the indoor environment.
The motion data will allow the ventilation industry to better target ventilation e ectiveness and develop better control methods for ventilation and heating.
Ventilation
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PENETRATION
Ventilation is a big topic these days when it comes to roof spaces or in-house ventilation. Modern houses become increasingly more insulated and air-tight, however, with cold and humid weather conditions like in New Zealand, house owners may still experience water dripping from the exhaust cooker or other outlet vents from bathrooms or laundry room. These conditions can create serious moisture problems with attendant damage and health issues caused by mould and damp.
The Metrotile Vent is part of the High Performance Roofing Systems. The unique design of this roofing system means there are no penetration cut on the roof and no need for ancillary trades to get up on the roof after the roofer has completed the install. It requires no further flashing, and is installed by a qualified roofer who is trained to install the weather-tight roofing system.
New Zealand’s most experienced roofing brand
www.metrotile.com
Build 152 — February/March 2016 — 47
FEATURE SECTION