Utilize Heat From Natural Light
Though sunshine is visible for far fewer hours each day in the winter months, when it is out, the sun is still warm. Especially if you have south-facing windows, make sure to keep your shades or curtains open during the daylight so that natural light–and heat from the natural light–will make its way into your home.
Utilize Heat From Natural Light
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Put Thick Curtains Over Your Windows
Place thick curtains over your windows to act as a barrier to trap the cold air in. Thin curtains won’t do the job, but multi-layered curtains will. If this trick works to your liking for your windows, you can also try it over your door to cover the cracks between the frame and the actual door.
Put Thick Curtains Over Your Windows