We have lots of elctric furnaces or heat pumps in the southern and western states where winters are milder. The air conditioning is the real usage. The insulati

We have lots of elctric furnaces or heat pumps in the southern and western states where winters are milder. The air conditioning is the real usage. The insulation in new homes is good, but the insulation to keep heat out needs to be in walls as much as ceilings which is harder to retrofit. Modern AC systems help quite a lot and keeping heat away from ac ducting in the attic by insulating them amd adding roof vents and radiant barrier to keep the attic cool. Lighter colors so your south facing wall doesn't fry eggs (literally) also help.