the couple replaced windows, siding, doors and the roof; installed insulation, solar panels and a new heating and cooling system; rebuilt a crumbling garage; and added a master suite to their 1,000-square-foot home.The result: an 85 percent drop in energy costs.
Replacing single pane windows for energy star rated dual pane windows will save energy. This typically amounts to a small fraction of your total energy use, and given the expense of replacing windows, there are typically much more cost effective ways to reduce your energy bills.”
space heaters consume a lot of wattage to heat that very small space you need heated. Compared to the cost to heat the entire home you are losing the fight with the power bill.