Opening blinds on any window catching direct sunlight lets in a bit of free warmth, even on the coldest days, while keeping blinds and curtains closed on windows without sun adds a layer of insulation instead. Heavy or layered curtains, or curtains with built-in thermal backing, block drafts even better and can save up to $75 a year.
Two Ways to Cut Winter Heating Costs

A cold snap almost always means a spike in the energy bill right along with it, but a couple of free or nearly-free habits can soften the hit.
Let the Sun (and Curtains) Help Heat the Home
Move Furniture Away From Vents
It's easy to end up with a couch or dresser blocking a heating vent after moving in or rearranging a room. A quick walk-through to check for blocked vents, and moving furniture during the winter months if needed, makes sure every room gets its full heat.
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