Does opening the blinds in winter save energy or waste heat?

I’ve been debating on whether opening the blinds in winter months actually save energy. On the bright sunny days, it’s tempting to open the blinds and let the sunlight in. Solar heat does heat up the room if the windows are large. With well insulated windows, it’s definitely a good idea to open the blinds. But the problems arises when I leave the house early in the morning and just don’t feel like opening the blinds when it’s still dark outside.

The other problem is when it gets dark early during December and January. By the time I get home, it’s already dark and the house feels cold with the blinds open. If there’s no one else to close the blinds in you house, then leave it closed if you get home late. Plus it’s safer. But on weekends, be sure to open the blinds and enjoy the solar heat. If you spend a lot of time in the office with articifical lighting, then it’s a must to let sunlight in on weekends.

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