Inside the Innovation House

We pulled out all the stops to bring the latest home tech features to our Innovation Home. See the 16 coolest things from the home and be amazed by how smart one home can be.

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Bathroom Countertop Ideas

Good-looking countertops -- whether made of marble, limestone, or concrete -- create high-functioning bathrooms that spill over with style. These popular countertop materials are sure to inspire a bathroom remodel.

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Find Your Dream Backyard

Whether you dream of sunning by a state-of-the-art pool or strolling through a simple cottage garden, there's an outdoor oasis with your name written all over it. Take this quiz to find out where you really belong.

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DIY Patio Ideas

Want to boost the beauty and usefulness of your outdoor spaces? Put one of these inspiring DIY patio ideas to work in your landscape.

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Easy Fireplace Upgrades

Does your fireplace need a facelift? Check out these 20 ideas for updating your fireplace with easy-to-apply embellishments and simple-to-make constructions.

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8 Cutting-Edge Exterior Features

The wow-factor of the Innovation Home starts with great curb appeal. See the eight things that make the home's exterior stand out.

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Budget Curb Appeal

Be the best home on the block for less. These budget curb appeal updates will show you how.

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Popular in Home Improvement

Window Air Conditioner Size Calculator

What size window air conditioner unit do you need? This estimator will help you assess the right model for your room.

Cubic area of room to be cooled:
Direction the room faces (choose one) North
Condition of your insulation (choose one) Good
Number of BTUs recommended:

Please note: For your convenience, this calculation has been rounded up slightly.

Important reminder: Every effort has been made to ensure the accuracy of this calculation. But before purchasing materials for any project, please check amounts with your suppliers or contractors.

Helpful Information

When choosing a window air conditioner, don't assume that buying the most powerful model is the best choice. An air conditioner that is too powerful for the room will not remove enough humidity, because it cools too quickly. And of course, a model that is too weak will fail to make a room comfortable. The cooling power of an air conditioner is calculated in British Thermal Units (BTUs). (One BTU is enough energy to heat one pound of water by 1 degree F.)

A few tips: If you need to install a unit that delivers 12,000 BTUs or more, have an electrician install a 240-volt receptacle. Smaller units can be plugged into a standard 120-volt receptacle, but make sure that by doing so you will not overload the circuit (see our Circuit Load estimator).

Other factors to consider: If the room is directly above a room with no air conditioning; if more than three people typically inhabit the room; or if the room's door will often be opened and closed, buy a model approximately 1,000 BTUs stronger than indicated by this calculator.


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