Heating and cooling in GraftonReal summer heat, and colder nights than you'd think.

Sizing for a Grafton heatwave

A system that's fine on an ordinary summer day can fall short on the worst ones. ActronAir says above 35 degrees an air conditioner loses cooling capacity, giving the example of a 14kW system dropping to 10kW or 12kW. Mitsubishi Electric says the same in plainer words: when it's very hot outside, the cooling effect may not be enough.

So ask for a heat load that accounts for the room's west-facing glass, its insulation and the ceiling height, and ask what the unit delivers on a very hot day, not just its rated kW. The energy label helps: the example in the ACT Government's guide shows cooling capacity at an outdoor temperature of 35 degrees.

Don't fix it by going much bigger. Rinnai says an oversized system short cycles and dehumidifies less effectively, which matters in a town with summer dew points near 19 degrees.

Heating in Grafton

Mild afternoons hide how cold Grafton's winter nights get. A reverse cycle system handles both seasons from one unit: the ACT Government says it turns each unit of electricity into 3 to 6 units of heat, against one unit for a portable electric heater.

For heating, look at the red stars on the energy label and the heating capacity at 2 degrees outside, which tells you more about a frosty July morning than the headline figure. Expect the odd pause, too. Mitsubishi Electric says heating can stop for about 10 minutes while the outdoor unit defrosts when it's cold and damp outside.

If you're weighing a gas heater instead, know that the NSW Energy Savings Scheme gives no incentive for gas space heaters installed from 1 July 2026. Our guide to reverse cycle or gas heating sets out the trade-offs.

Running it through a heatwave

NSW's Noise Control Regulation 2026 restricts the hours air conditioners on residential property can run when the noise is heard in a neighbour's room. The EPA said in August 2026 that the strengthened rules exempt air conditioners from restricted hours during severe or extreme heatwaves. That's worth knowing on a hot Grafton night.

Before the hottest weeks, clean the filters and clear anything from around the outdoor unit. Daikin recommends cleaning or changing filters at least once a month through summer. A yearly air conditioning service before December catches the rest.

NSW discounts and licences

Grafton households may be eligible for the NSW Energy Savings Scheme discount on an energy efficient air conditioner, if installers in the Clarence Valley offer it. It comes through an Accredited Certificate Provider, not the NSW Government, and the nomination form has to be signed before installation begins. Air conditioning work in NSW needs a licence or certificate, which you can check on Service NSW.