If the weather outside is hotter, then close your windows to trap the “cool” air in. On the other hand, if the inside of your house is hotter, usually in the early morning or late evening, then open them up to let a cool breeze in.
The rule you should go by is whether it is hotter outside than inside. If the temperature is higher outside than it is inside, you should keep your windows and curtains closed. This will shut the heat out, and help to keep your home cool.
The basic rule of thumb is that you should close your windows when the temperature outside starts to exceed the temperature inside. It may seem counterintuitive, but as the temperature climbs, you'll often make your home warmer, not cooler, by opening the windows.
“If it's cooler inside than outside, you should keep your windows closed,” he says. Although it's easy to imagine that flinging your windows wide might invite some hint of a cool and pleasant breeze, in all likelihood, you'll just be bringing warm air in – making your living space even hotter.
From what I've been able to gather from the experts, the answer to this question is actually pretty simple: When the air outside is cooler than the air inside — like at dawn, dusk and overnight — keep the windows open to cool your house off.
Open windows – and doors – to encourage airflow and a cool draught through your bedroom. Draw curtains or blinds during the day to block the sun out and keep your room cooler at night. If you've got an attic, try opening the hatch. Hot air rises and this will give it somewhere to go.
When air is trapped, it searches for ways to escape, often outside the home, creating energy waste and making the AC work harder than it normally does. Closing off a room to save energy actually has the opposite effect. Unless you're looking for some privacy, keep your doors open to save energy.
'Having better airflow from the door being left open can help your bedroom have a more even temperature with the rest of the house/apartment, allowing your thermostat to respond and keep you cool for good quality sleep,' explains Dr. Jade Wu, PhD, and Mattress Firm's sleep health expert.
Dirty air filter—A dirty filter restricts airflow, not letting your home get enough cool air. Closed vents—Closed vents in rooms can cause them to be hotter than other rooms. Open windows—Your conditioned air can flow out of open windows, leaving uneven temperatures in your home.
Your Ducts Are Leaky or Not Insulated
This can cause rooms that are further away from your air conditioner to be warmer than usual. Likewise, if your air ducts are located along exterior walls, under your home, or in the attic, the heat buildup in those areas can increase the temperature of your metal ducts.
Leaving your windows open at night is a great way to ensure fresh air, but also opens you up to some potential risks. The biggest consideration is the safety and security of your home. If you leave your windows open, there is an increased chance that a criminal may use these to gain entry into your home.
A window open for 15 minutes is enough! That's it. With this method, only the indoor air will be cooled. It will take just a few minutes to heat the room again.
Sleeping with the window open could inadvertently trigger allergies, asthma or potentially cause illness in someone with an already-weakened immune system. But for most people, it's relatively risk free. Aim to keep your bedroom around 65 degrees with 65 percent humidity.
Keeping interior doors open is your best option if you want better airflow inside. Opening the doors allows the cool air from your air conditioner to circulate more freely and reach all the areas of your home.
Closing your bedroom door before you go to sleep will substantially improve your chances of surviving a fire in your home. According to the National Fire Protection Association (NFPA), the number of home fires decreases when people go to sleep.
Closed doors don't allow the conditioned air to circulate throughout the house, creating uncomfortable hot and cold spots throughout.
Especially with central air, closed doors and vents only obstruct the blower fan and ventilation, which leads to balmy, hot air. Closing a door unbalances the system, causing pressure changes and air leaks. Open vents and doorways help keep air flowing and your home cool.
Use an Air Conditioner
You can fan yourself with the door to cool yourself down, but you can't actually lower the temperature of the room. This is because refrigeration is not a perfectly efficient process. More heat enters the room through the exhaust vent than is extracted from the inside of the refrigerator.
If you're struggling to sleep during warm weather, then it's advised to sleep on your side as this will allow more heat to escape from your body. As well as sleeping on your side, try and sleep with your hands and feet outside of the cover as this will also help.
If there are a lot of windows in your bedroom, heat from the sun will create a greenhouse effect. During the day, the sun shines in, warming the air in your bedroom. Because that warm air is now trapped inside, the room retains the warmth throughout the evening and into the night.
Poor insulation, inadequate air circulation, and direct sunlight exposure are common culprits. Another possibility is that the room may have more electronic devices or appliances generating heat. Sometimes, the air conditioning system may not be properly balanced, resulting in uneven cooling.
The reason people “sleep hot” has a lot to do with design. Our core body temperature drops by a couple of degrees during the night, shedding heat into the surrounding areas, and certain sheets and mattresses trap the heat and moisture around us.