People living in poorly insulated housing will be eligible for a new "deep retrofit" under the expansion of a government scheme.
Communications Minister Denis Naughten announced the initiative at the Fuel Poverty and Climate Action Conference in Croke Park yesterday.
Energy efficiency was cited as "central" to the minister's plan, as the Warmer Homes Scheme will be expanded nationwide.
Solid wall insulation, mechanical ventilation and renewable heating systems are some of the upgrades that can be expected to save and properly utilise energy.
It will be available for people on Fuel Allowance, Family Income Supplement and the One Parent Family Payment - among others.
Meanwhile, Mr Naughten will today deliver a stark warning to the Cabinet about Ireland's ability to reach carbon emissions targets.
While seeking approval to publish a draft national mitigation plan for statutory consultation, he will say Ireland will not meet greenhouse gas emissions targets for 2020.
According to the Environment Protection Agency, emissions in 2020 could up to 6pc below 2005 levels, well short of the 20pc target.
The minister will provide a memo to Cabinet noting that funding climate action to the required level presents an "enormous challenge" for Ireland.