Sealing draughts and replacing gas appliances were among the top tips from the Climate Council.

Climate Council's head of advocacy Dr Jennifer Rayner said too many Australians were living in "glorified tents".

Up to eight million homes were built before any minimum energy standards existed in Australia and many still had poor energy ratings.

Dr Raynor said homes with poor energy efficiency were expensive to run and uncomfortable to live in.

"Climate Council's analysis shows Australians could be saving somewhere between $1000 and $2800 a year on their energy bills, depending on the type of upgrades they make in their homes," Dr Rayner said.

"That's a massive benefit at a time when so many Australians are struggling with their cost of living."

Dr Rayner said the best place to start in cutting bills and boosting energy efficiency was to get off gas.

"That means thinking about replacing cook tops, hot water services and heaters," she said.

"But the other place to look is improving the energy efficiency of your home... things like insulation, double glazing your windows or even simple things like draught sealing."

Draught sealing could save $214 off the annual power bill of a 1.5-star energy rated household while ceiling insulation could save $279.

But, these changes required upfront costs.

"That's why we're calling on governments around Australia to support households with zero-interest loans for the cost of making these improvements to their homes," Dr Rayner said.

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Some level of support already existed, but it varied across jurisdictions.

The No Interest Loan Scheme offers up to $1500 to eligible low-income families and individuals to buy essentials including household appliances.

For households unsure where to start, the Residential Efficiency Scorecard rates homes for energy use and comfort, and gives specific advice on where improvements can be made.

Climate Council has also developed a how-to guide and a bill savings simulator.