Summer heat can be unbearable if you don’t have the right cooling solutions. Running your air conditioner keeps your house cool but at the cost of your energy bill. Blackout curtains are an ideal way to reduce your home’s temperature without increasing your monthly bills. If you’re looking for a top-notch set of blackout curtains, there are a few things you’ll want to consider before buying. What to know before buying blackout curtains Types of blackout curtains Room-darkening curtains: These curtains block out roughly 90% to 95% of the light entering your room.