Make your home more energy efficient in Australia

Making a home more energy efficient can lower power bills, improve comfort and reduce household emissions. The work ranges from adjusting everyday habits to sealing draughts, replacing inefficient equipment and improving insulation.

Start with a recent electricity bill and the way your household uses energy. Heating, cooling and hot water often account for much of the demand, but lighting, appliances and electronics also contribute. A clear baseline helps you judge whether a change is actually saving money.

Australian homes occupy very different environments, from Melbourne’s cool winters to Brisbane’s humid summers, Perth’s hot dry weather and Hobart’s long cold seasons. The most effective measures depend on the building, its orientation, the local climate and how much control tenants have over upgrades.

Find where energy goes

Read a complete billing period and separate electricity use from gas use where both are available. Record the bill amount, the meter reading and the main household activities. Electricity retailers offer usage-based and fixed-price plans, so compare tariffs with the Australian Energy Regulator’s Default Market Offer as one market benchmark.

Check the building’s weak points. Look for gaps beneath external doors, damaged window seals, exposed roof spaces, hot ceiling lights and rooms that are uncomfortable in ordinary weather. Apartments may have limited control over shared heating, while detached houses often provide more freedom to improve insulation, windows and rooftop equipment.

Keep findings in a simple home energy file with photographs, measurements and quotations. A neutral general research resource can hold additional links to guidance and product information while you compare options. Track the date and expected effect of every proposed change so spending remains focused on the building’s real needs.

Seal the building envelope

Draught-stopping is often inexpensive and immediately noticeable. Fit brush seals or flexible strips to doors, seal gaps around pipes, windows and vents, and repair obvious leaks. Avoid blocking combustion appliances, and ask a qualified tradesperson to check any work near a heater, fireplace or gas connection.

Many Australian houses are detached brick-veneer homes with tiled or metal roofs, wide eaves and courtyards that create different conditions on each side. Shade and insulation can therefore matter more on western windows than on eastern ones. Queensland requires ceiling insulation in many new homes, while other states use different climate zones and building rules.

Insulation acts as a thermal buffer, reducing the heat entering a roof space during summer and the heat escaping during winter. Consider ceiling insulation, wall insulation, reflective foil beneath floors and insulated water-heater pipes where these features are absent or damaged. The National Construction Code sets energy-efficiency requirements for new construction and renovations, and NatHERS star ratings help compare the thermal performance of new homes.

Choose efficient heating and cooling

Ducted split systems and reverse-cycle air conditioners are common across Australia, while gas ducted heaters remain familiar in many southern homes. Melbourne’s chilly winters and Tasmania’s cold seasons can make heating the priority, whereas Brisbane, Sydney and Perth often place greater demand on cooling. Compare the operating cost of available fuels rather than assuming one system suits every household.

A reverse-cycle heat pump can provide both heating and cooling efficiently. Correct sizing, clean filters, unobstructed outdoor units and properly commissioned controls all affect performance. Request the star rating and estimated running costs, and compare them with the cost of operating the existing heater. Replacing a working gas heater solely for efficiency may take longer to pay back than sealing and insulating first.

Use ceiling fans to move room air, especially in humid conditions where moving air feels effective even when the temperature has changed only slightly. Set cooling temperatures around 24–26°C and use heating only when the building is occupied. Fans generally consume far less electricity than air conditioners, making them a practical part of a cooling strategy.

Before purchasing a large system, obtain a room-by-room load assessment and compare several quotations. Installation quality matters just as much as the appliance label. For example, a refrigerant split system installed in a sun-exposed western room may use more electricity than its rated efficiency suggests.

Change everyday energy habits

Lighting and appliances offer straightforward opportunities. Switch off unnecessary lights, choose LEDs and activate basic occupancy controls in storerooms or hallways. When replacing equipment, compare the Australian Energy Label rather than focusing only on purchase price; efficient models usually consume less electricity over their service life.

Run washing machines and dishwashers with full loads, wash laundry in cold water where suitable and line-dry clothes when the weather permits. Avoid leaving computers, televisions and game consoles on standby. These actions rarely transform a bill on their own, but they can reduce background demand and make the results of larger upgrades easier to see.

Hot water is another major household load. Shorter showers, repaired leaks, insulated hot-water pipes and an efficient showerhead can reduce demand. A heat-pump water heater may be worthwhile where gas water heating is costly, although rebates, electricity tariffs and installation requirements vary. Check local rules and product credentials before replacing a unit.

Get more from solar and controls

Rooftop solar is now a familiar part of many Australian homes, particularly where roofs receive strong sunlight. Panel output depends on orientation, tilt, shading, system size and the amount of electricity used during daylight hours. A large array may export substantial power during the day while the household still buys electricity in the evening, so assess consumption as well as generation.

Roof-mounted equipment needs to remain accessible for inspection and cleaning. Keep the site clear of leaves, check inverter displays and arrange servicing under the manufacturer’s instructions. Where a battery is practical, compare its cost with the value of shifting consumption away from peak-price periods. Batteries do not create free energy, and their financial case can change as tariffs evolve.

State government rebates, retailer offers and local programs differ and may open or close to new applicants. Use an installer accredited by the Clean Energy Council and request a clear performance estimate. A lightweight information landing page can provide a neutral place to revisit general updates as household energy resources develop.

Sequence upgrades by cost and payoff

Rank actions by their likely saving, cost, complexity and effect on comfort. Start with measures that require little money or can be completed safely, then assess larger investments. Obtain at least two comparable quotations and include installation, rebates, maintenance and expected running costs in the comparison.

Immediate household measures

Planned building and equipment upgrades

Minimum efficiency and rental-property rules differ between states and territories. Owners should check the National Construction Code, NatHERS requirements and the relevant state tenancy legislation before undertaking work on an investment property. Landlords and tenants can also benefit from a written schedule of bills, meter readings, maintenance and any agreed appliance upgrades.

Start with a home energy plan

Choose one month as your starting point. Gather bills, inspect the building, list the main energy users and identify the changes that can be completed immediately. Review the results after another full billing period, then adjust the plan according to actual savings and comfort rather than an installer’s headline estimate.

Choose one action today: open your latest electricity bill, mark the three highest-cost uses and schedule the first improvement. Put the next measure on the calendar before leaving the household energy plan, then measure the change and build on what works.