With our warm weather still going strong, staying cool doesn’t have to be difficult. Window AC units have come a long way from their bulky, hard-to-install predecessors. In fact, today’s models are more high-performing and energy-efficient than you might even know. Here’s a quick guide on what to know when buying a window air conditioner.
What Is a Window AC Unit, and How Does It Work?
A window AC unit is a compact cooling system that’s perfect for spaces where central air conditioning isn’t feasible, such as apartments, small homes or single rooms. They’re designed to fit most standard-sized windows, with options also available for custom window types.
The components—often including a compressor, evaporator coils, condenser and fan—work together to cool the air inside a room while expelling heat outside. Common features include an adjustable thermostat, remote control, timer, energy-saver mode and multiple fan speeds. Advanced models may offer smart connectivity for smartphone control, built-in air purifiers and noise reduction technology.
What Size Window AC Do I Need?
Choosing the right-sized window AC unit is key for efficient cooling. Start by measuring the width, height and depth of the desired window. Then, determine the ideal BTU (British Thermal Unit) rating to match the unit size with your space.
BTUs measure how much heat the AC can remove per hour, typically ranging from 5,000 for smaller rooms to 12,000 for larger areas or entire apartments. Key factors influencing BTU needs include:
- Sunlight exposure (more sunlight = higher BTUs)
- Number of occupants (add about 600 BTUs per person)
- Kitchens, which may require an extra 4,000 BTUs due to cooking heat.
An undersized unit will struggle to cool effectively but don’t automatically buy the largest unit you find, either: an oversized unit may cool too quickly without proper dehumidification.
Are Window Air Conditioners Energy Efficient?
Yes, AC units are energy efficient if you choose a model that’s specifically designed not to use as much electricity. Look for Energy Star-rated units, which will consume at least 10% less energy than conventional models and can still provide effective cooling. To boost your efficiency even more, be sure to keep windows and doors closed while the unit runs and use a timer or an energy-saving mode when possible.
Energy-Star-certified window replacements can reduce heat entry during warmer months, potentially decreasing your need for supplemental AC. A Window World expert can explain how.
How to Install a Window Air Conditioner
Installing a window AC unit is generally straightforward, but always follow the manufacturer’s instructions as steps may vary. If you’re unsure or uncomfortable with any part of the process, consider hiring a professional.
- Prepare the Area: Remove curtains or blinds and check that the window frame is in good condition to support the AC unit.
- Install Mounting Brackets: Attach any included brackets to the window sill or wall as directed.
- Position the Unit: With assistance, place the AC unit into the window, aligning it with the frame and resting it on the sill. Adjust the side panels to close any gaps.
- Secure the Unit: Using the brackets, secure the unit to ensure the closed window holds it in place.
- Seal Gaps: Use removable weatherstripping to seal any gaps and prevent air leaks.
Maximize Your Home’s Comfort With Window World
Window AC units offer practical and affordable cooling for small spaces. For consistent room temperatures and savings on energy bills year-round, upgrade to energy-efficient windows from Window World. Get started with your free estimate!