Air Conditioner Buying Guide
On February 25, 2026 By newsroom Topic: Appliance Buyers Guide
Looking for an air conditionerHere’s a concise guide to help you find the best unit for your space and needs.
Key Factors to Consider
Room Size and BTU Capacity
- Match the AC's cooling capacity (measured in British Thermal Units, or BTU) to your room size for optimal performance.
- Guidelines:
- 100–250 sq. ft.: 5,000–6,500 BTU (Small rooms)
- 250–350 sq. ft.: 7,000–8,500 BTU (Medium rooms)
- 350–550 sq. ft.: 9,800–12,500 BTU (Large rooms)
- Adjustments:
- Add 10% more BTU for sunny rooms or reduce by 10% for shaded rooms.
- Add 600 BTU per extra person beyond two in the room.
- Add 4,000 BTU if used in a kitchen.
Energy Efficiency
- Look for Energy Star-certified units for lower electricity costs.
- Features like U-shaped designs and inverter-powered compressors enhance efficiency.
Noise Levels
- Choose models with quiet operation, especially for bedrooms or workspaces.
Airflow Direction
- Ensure adjustable fan arms to direct cool air effectively, especially if the window isn’t centered.
Smart Features
- Wi-Fi-enabled units let you control the AC remotely via apps or integrate with smart home systems.
Warranty
- Check for warranties covering longer periods for peace of mind.
Types of Air Conditioners
Window Air Conditioners
- Installed on windowsills; available in small, medium, and large capacities.
- Cost: $150–$600
- Best for: Cooling single rooms.
Portable Air Conditioners
- Freestanding units designed for flexibility in spaces without suitable windows.
- Cost: $350–$800
- Considerations: Tend to be noisier, less efficient, and heavier than window units.
Split Ductless Systems
- A compressor outside connects to indoor air handlers, cooling without ducts.
- Cost: $1,000+ (Professional installation recommended)
- Best for: Cooling multiple rooms or areas without existing ductwork.
Installation and Maintenance Tips
Proper Installation
- Most units are made for double-hung windows. Use foam and weather stripping to seal gaps and reduce energy loss.
- Ensure the unit is level for proper drainage.
Filter Cleaning
- Clean filters weekly during high use and monthly during lower use to maintain efficiency.
Placement
- Keep heat-generating devices like TVs and lamps away from the unit.
Why Experts' Tests Matter
Experts evaluate air conditioners on:
- Cooling Speed: Time to lower a room’s temperature by 10°F in a heat chamber.
- Temperature Holding: Ability to maintain a set temperature.
- Noise Levels: Measured at low and high settings.
- Reliability and Satisfaction: Data from thousands of owners informs brand reliability and user satisfaction scores.
Popular Features to Look For
- Touchpad Controls: Easy-to-read digital displays and buttons.
- Remote Control: Adjust settings without leaving your spot.
- Programmable Timers: Save energy by scheduling on/off times.
- Directional Airflow: Customize cooling zones.
Recommended Air Conditioner Types by Room Size
Small Rooms (100–250 sq. ft.)
- Capacity: 5,000–6,500 BTU
- Cost: $150–$350
- Example: Compact window AC.
Medium Rooms (250–350 sq. ft.)
- Capacity: 7,000–8,500 BTU
- Cost: $250–$450
Large Rooms (350–550 sq. ft.)
- Capacity: 9,800–12,500 BTU
- Cost: $350–$600
Whole Home or Multi-Rooms
- Type: Split ductless system
- Cost: $1,000+
Top Brands
- Friedrich: Premium window units, ranging from 5,000 to 24,000 BTU.
- LG, GE, and Frigidaire: Reliable and widely available, with models for all room sizes.
Stay cool while saving energy this summer with the perfect air conditioner!
