Close and cover windows during the day or add window insulation. drapes over them when the sun is shining. White or reflective lining in drapes increases their ability to block out heat. Reflective coatings on windows themselves can also minimize heat transfer through the glass.
First, check for these common problems: 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.
Make your bed a haven of chill with fans, extra airflow, and low light. Stay on lower levels in your home and minimize heat from electronics and ovens. Opt for light clothing, bedding, pillows, and mattress pads to keep things cooler.
Point it out the window to blow the hot air out, and open a window on the shady side of the house to draw the cool air in. "It really is the best, low-cost, highly effective technique to keep a home cool, but it is virtually unknown in New Zealand," Lebo said.
Generally, a home that has adequate insulation allows cool air to remain indoors during warm weather. In that regard, it would make sense to keep the windows closed, especially if the temperature outside is hotter than it is inside.
Windows are the biggest openings in your home. They allow sunlight to enter throughout the day and often they can cause a room to turn warm in a manner of hours thanks to the sunlight that comes through. This in turn causes your AC to work overtime to keep the temperature balanced resulting in wasted energy.
Placing a fan in a room will disrupt that balance and can force the cooler air to go where you want it to be. However, fan placement matters. Place your fan so that it faces the opposite wall from where most of the activity takes place in your space.
To ensure optimal cooling with a window fan, the US Department of Energy suggests putting it in a window where the wind is blowing away from the house. This helps pull the hot air out of your home.
The expert suggests hanging the wet towels near your fan, where the water will evaporate and help to draw heat away from the air. 'It is worth noting that fans do not actually lower the temperature of the air, but they can make it feel cooler by creating a wind chill effect.
Insufficient Insulation
Sufficient insulation is necessary when it comes to keeping cool air in and warm air out in the summer. If areas of your home are poorly insulated, you'll likely notice that area is warmer in the summer and colder in the winter compared to the rest of your home.
Check Insulation, Windows and Doors
If one room is staying hot while the rest of your house cools down, it might be that a window or door in that room isn't airtight. Make sure all the windows are fully shut, then check the sills for a crack or opening that's letting air through.
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.
Close curtains and blinds
Something like 30% of unwanted heat comes in your windows so keeping curtains and blinds closed will help, especially during peak sunlight hours and on windows that face the sun.
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.
Turn on a Ceiling Fan
Ceiling fans are great for moving air around, especially in stuffy rooms, and they can assist in keeping the room cool or warm, depending on the direction that the fan turns. Over the summer, be sure your ceiling fan is moving counterclockwise—this will move cool air down toward the floor.
Window Coolers: These are the high-maintenance coolers that get installed on the window with the body outside the house. It also offers honeycomb pads and is slightly more expensive but easier to maintain. Another advantage of having a window air cooler is that it consumes less power than other types.
A set of cooling sheets is a great investment for any hot sleeper. Breathable fabrics like cotton, bamboo, and linen can make a world of difference in how much airflow you get at night. This set is a bamboo-cotton blend (55% bamboo and 45% cotton), which will feel breathable and be naturally antibacterial.
“Generally, when it is really hot outside it is a good idea to keep windows closed during the daytime, as you don't want the hot external air to come into the house warming it up. However, after the sun goes down, the outside air will start to cool down,” Browning explains.
15 minutes is enough to air the house properly
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. Leaving a tilt-and-turn window ajar all day, however, is not effective: it cools the walls and it costs much more to heat the room back up again.