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Green Smart Magazine : 2009_new
assist in moderating temperature changes. Consider the width of the house and room sizes to ensure solar access into rooms during winter, while ensuring appropriate cross ventilation paths in summer. Remember... Discuss all these principles with your designer and builder. He or she will help you select the most appropriate options to suit your climate and to meet current building regulations across Australia. HIA GreenSmart Professionals can provide advice and understand how to build to suit your climate. For more information check out: www.greensmart.com.au www.yourhome.gov.au/technical/index.html gs greensmart 9 7 amount of cold air entering the home. The focus should be on sealing gaps around windows and doors, installing self-closing exhaust fans, designing in a sealed entry foyer to help control air exchange between outside and inside, and insulating underneath elevated sub-floors and around slabs. Other options for cooling homes include locating a water body in the path of natural breezes and near openable windows to create cooler air. For elevated homes, drawing in cooler air from beneath the floors and expelling hot air from the ceiling area can create air movement. Building form The overall design needs to consider the size, use and location of rooms to optimise the efficiency of passive heating, cooling and ventilating to suit your climate. For cooling climates -- Consider the width of the house and room sizes to minimise rooms without windows. Incorporate deep, covered balconies to shade walls and windows facing north and west. Think about the location of internal walls to ensure breeze paths are not blocked and to create room zones that can be closed off. Consider a fly roof (detached from the home) to shade the entire home and direct cooling breezes into the home. For cooling and heating climates -- Consider including high thermal mass materials inside and outside the home to The following tips will help you to improve the environmental performance of your home, saving energy and water while maintaining comfort. These tips can be applied for both new and existing homes. 1 If you're building a new home, make sure it is positioned to make the most of solar passive design opportunities for your climate. If you're renovating, consider changing rooms around to take passive design into account. 2 Incorporate shading structures or eaves to minimise the entry of summer sun, but allow penetration from winter sun in climates that require winter heating. In humid climates consider shading the whole building to avoid entry of summer sun. 3 Insulate the walls, floors and ceilings of the home with the most suitable material and one that has the highest R-value for the job and is appropriate to your climate. Combine insulation with lightweight construction in cooling climates. In other regions consider combining external insulation with thermal mass, i.e. bricks, concrete or earth, inside the home. 4 Seal around external doors and windows and install self-sealing exhaust fans in bathrooms, toilet and laundry areas to control entry and exit of hot and cold air. 5 Select window glazing -- e.g. single, double or tinted -- that achieves optimum glazing conditions for your climate. The correct placement and selection of window treatment will also help maximise cross ventilation. We recommend you seek expert advice. 6 Zone the house so you have more control on the areas of the home that require supplementary heating or cooling, i.e. by placing and using internal doors. 7 Select the most energy- and water-efficient whitegoods and lighting appliances that you can afford. 8 Install four-star toilets, water efficient tapware and shower roses, and hot water recirculators. 9 Consider installing treated wastewater systems or rainwater tanks to help reduce the amount of potable (drinking) water used in and around the home. 0 Purchase renewable energy for household use or install photovoltaic or turbine systems where your budget allows. improving your home's performance top tips 1 Photo courtesy PBS Solutions FOR ELEVATED HOMES, DRAWING IN COOLER AIR FROM BENEATH THE FLOORS AND EXPELLING HOT AIR FROM THE CEILING AREA CAN CREATE AIR MOVEMENT