Blinds can help control home temperature. So, if you want to keep the house cool in summer: you close them during the day. If you want to keep the house warmer in winter: you open them during the day. If you are going away for an extended period (vacation): closed.Click to see full answer. People also ask, should I leave my blinds open during the day?Blinds can help control home temperature. So, if you want to keep the house cool in summer: you close them during the day. If you want to keep the house warmer in winter: you open them during the day.Likewise, does keeping your blinds closed? By closing the blinds, you keep direct sunlight out of your home and reduce unwanted solar heat gain. Closing window blinds can also save energy in the winter. Closing the blinds adds some insulation to the windows, reducing heat loss. Some blinds also reflect heat back into the room. Just so, is it better to sleep with blinds open or closed? To get out of bed at your freshest, waking up seven to eight hours after falling asleep is ideal. Any less or any more and you risk interrupting either stage of sleep. Leaving your blinds or curtains slightly open will also help suppress melatonin production, helping you to resist 10-minute snoozes.When should you close your blinds?If the window is on the ground floor, the blind should be closed slats up. Otherwise, people can see in from the floors above. If, however, you are on an upper floor and the slats are up, anyone can see in from the ground floor. For that reason blinds on an upper floor should close slats down.