Ah, air conditioning. During the dog days of summer it’s easy to deem air conditioning as one of humankind’s greatest inventions. Unfortunately, it just so happens to be an energy-intensive one, which can lead to high energy bills. What’s more, many older homes don’t have central air installed, especially in more temperate regions. This may be fine when the thermostat only clocks in at 60, but it can be painful when it soars into the 90's or above.
Thankfully, there are plenty of energy-efficient ways to keep your home cool in the summertime without the help of AC. Let’s take a look at just a few…
1. Shading Your Windows
One of the best things you can do to keep your house cool without even thinking about AC is shading your windows. There are a number of ways to do this.
Roof overhangs and awnings. A roof overhang is a type of roof that extends further than a typical roof, providing shade for the part of the house it covers. An awning provides a similar function, and can be added to any window, whether on the first floor or second, even after a roof has been installed. For maximum cooling, you’ll want to invest in protecting your western and southern windows from light, as this is where they’ll prove most necessary and effective. However, if you’d like to benefit from passive warming in the winter, overhangs and awnings are likely too permanent of a solution. Instead, you’d be better shading your windows with one of the removable and retractable options below.
Automated blinds. A good pair of thick blinds can do wonders when it comes to keeping your house cool, especially if you keep them closed during the warmest parts of the day. Due to their construction, honeycomb blinds in particular can be effective at absorbing heat, but any thick blind will do. An automated pair of blinds that open and close on a schedule and that can be controlled from afar can help you maximize cooling throughout the day when you’re gone. Whatever kind of blinds you choose, these are a good solution for southern facing windows since they can be raised in the winter when you might need warmth.
Other window treatment options. Of course, there are many other kinds of window treatments that are great at blocking out light. Shades are particularly effective if mounted closest to the window to reduce heat gain. Medium-colored drapes with a plastic backing can reduce solar gain by as much as 33%. Pro tip: dip your drapes in water or wash them the night before and let them dry as they hang for even more cooling. Tightly woven bamboo screens, whether placed inside or outside of a window, can also prevent as much as 80% of solar heat from passing through the window.
Glaze and film. For particularly hot regions of the world, glaze and film are a must for keeping your house cool. Low-e films in particular will lower your cooling bills, while still allowing pleasant amounts of light through.
Trees. Planting trees around your house -- but not so close that they become a fire hazard -- is a beautiful and natural way to shade your windows. Again, don’t do this on the south facing side if you’d like passive heat in the winter. Opt for a variety that’s known for its shading, like a species of maple or river birch.
2. Insulate Your Home Well
We often think of insulation when it comes to keeping our houses warm, but it’s just as important in keeping the house cool. You’ll want to insulate ducts to prevent any leakage, as well as your attic and walls. Spray foam, rigid foam boards, and batt insulation are all effective at regulating your house’s temperature.
On a similar note, if you are currently designing or remodeling your home, now is the time to choose materials that have a high thermal mass, which means that they store heat. Such materials include brick, cement, rammed earth, stone, and ceramic tiles. If you’ve got a finished home, even covering a wall that receives a large amount of sunlight with a material like brick can help to absorb heat.
3. Install and Use Fans Strategically
Fans are an effective and cheap way to move air around your home, but that won’t do you much good if you’re just circulating hot air. Placing a fan in a window will allow you to suck cool air in at night. In corner rooms, placing another fan in the opposite direction will pull hot air out of your house, while that cooler air is sucked in through the opposite window.
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Ceiling fans placed throughout the house can work great, especially if they’re made to spin counterclockwise to create a wind-chill breeze effect. And if your house has a cool basement, a ventilator fan will push that cold air up into your house.
4. Say Goodbye to Incandescent Lights
Incandescent lights are known for being energy inefficient, but did you know how they waste so much energy? By giving off heat, of course! In fact, they lose about 90% of their energy that way. Opting for more energy efficient choices like compact fluorescent bulbs for lamps and overhead lighting and LED bulbs for under cabinet kitchen lighting will save you on your lighting bills and keep your house cool at the same time.
As you can see, there are many excellent, energy efficient ways to keep your house cool without even having to glance at the price tag on an air conditioning unit. Of course, your best strategy is to use a combination of these techniques together for maximum effectiveness. So ditch the ice pack this summer, and make your house the coolest on the block.
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