Summer in Central NSW is most certainly making its presence felt this year. We’re even heading for 44 degrees by the end of the next week.
When you have several consecutive days over 40 degrees Celsius, there’s very little reprieve no matter how well planned your house and energy use. I’ve been trying to stick to inside jobs over the past few weeks, preferably where there’s air conditioning. But with late afternoon and evening temperatures being so high, it’s nice to know I’m coming home to a cool house even if I have been working inside most of the day.
We’re lucky we live in a passive solar house that was ahead of its time when it was built during the mid-1980s. On top of its north orientation, some of the features allowing us to minimise the use of the air-con even during the hotter weeks of summer include:
- a 2.5m verandah around the entire house shades the slab, windows and walls from direct sun, with the addition of a well-watered trellised vine/shrub buffer and pergola on the south-west/western side of the house ensuring there’s no direct heat on the western side. It’s where the dogs like to hang out on hot mornings.
- large trees on the outer edges of the house yard shade big areas of the garden;
- the light coloured roof reflects heat;
- small areas of lawn planted close to the house are watered most nights (using dam or recycled grey water);
- the benefits of cross-ventilation are utilised by opening the house up at night to capture cooler evening breezes when they’re around, circulated through the house with the help of ceiling fans;
- and the key feature – a long central hallway with a high ceiling and three roof-mounted whirly birds drawing cool air through the centre of the house. Vents and high, open windows in rooms either side of the hallway draw hot air into the hallway and out through the roof. The whirly birds, vents and windows can all be closed up in winter.
Despite this, we’ve still had to resort to using our air-conditioner more this summer than we’ve had to previously. With the exception of a few nights when it’s been 30 degrees plus at 10pm and minimums haven’t dropped much below 25 or 26 degrees, we often don’t turn the cooling on until mid to late afternoon, turning it off again at bedtime.
I work in all types of homes across Dubbo and some are better designed than others when it comes to cooling and heating. Yet, there are some very basic things we can all do in our homes to ensure we minimise the cost of air-conditioning.
- Use ceiling fans where possible to create air flow;
- Service your air-conditioner to ensure it’s working well;
- Ensure you have adequate insulation and roof ventilation;
- Shade windows and western walls with window coverings (awnings and curtains) and outside plantings;
- Close up the house before things heat up in the mornings and open it up again at night;
- Cool yourself down before you decide to cool down your house – it’ll hopefully delay the need to turn on the air-conditioner.
If you need a hand with installing whirly birds, insulation, awnings or window coverings, planting lawn, shrubs or vines give me a call. I even build pergolas. Call a sparky to install ceiling fans or to install or service your air-conditioner.
For more information on passive cooling check out this site.