Air conditioners use 20–30% of home electricity in Bermuda’s warm climate, so choosing an efficient system, and using it wisely, can significantly reduce your energy bills.
Types of Central Air Conditioners
Split-System Units
- Outdoor cabinet contains the condenser and compressor.
- Indoor cabinet contains the evaporator coil and sometimes the heat pump.
- The evaporator coil is typically installed in the cabinet or main supply duct.
Packaged Units
- All components (evaporator, condenser, compressor) are housed in a single outdoor cabinet, usually placed on a rooftop or concrete slab.
- Common in small commercial buildings.
- Indoor air supply and return ducts connect through the exterior wall or roof.
Buying a New Air Conditioner
Energy Efficiency
- Today’s units use 40–60% less energy than models from the 1970s.
- Replacing a system 10+ years old can save 30–50% on cooling costs.
What to Choose
- Select a split or central system with a variable-speed inverter compressor.
- Look for:
- SEER2 15–18 (higher is better).
- For window units: SEER 12+.
- Eco-friendly refrigerant (e.g., R-454B).
Size Matters
- Oversized units cool too quickly and do not remove humidity.
- Undersized units struggle to reach comfortable temperatures.
- Ask for a professional load calculation.
Helpful Features
- Thermal expansion valve (improves performance in hot weather)
- High EER (12+)
- Fan-only switch (useful for night ventilation)
- Filter check indicator
- Automatic-delay fan switch (reduces wasted energy)
Installation & Location
A high-efficiency unit will only perform well if installed correctly. Ensure your contractor:
- Provides adequate space for maintenance and repairs
- Places the outdoor unit where airflow is unobstructed
- Locates it away from bedrooms and neighbours to reduce noise
- Confirms refrigerant charge and airflow match manufacturer specs
- Installs the thermostat away from heat sources (windows, supply vents)
Using Your Air Conditioner Wisely
Everyday Energy-Saving Actions
- Cool only the rooms you need.
- Use AC only when necessary.
- Shade sun-exposed windows; use fans or natural ventilation when possible.
- Set thermostat to 78°F (26°C) or the highest comfortable temperature.
- Keep doors and windows closed.
- Clean filters monthly.
- Schedule a yearly tune-up, seal ducts, and replace filters every 1–3 months.
- Use ceiling fans, close blinds during the day, and avoid heat-producing appliances.
Smart Air Conditioner Options
Smart ACs offer extra savings (often 10–20% more):
Features
- WiFi connectivity
- App/voice control (Alexa, Google)
- Scheduling & geofencing
- AI presence detection
- Humidity/temperature sensors
- Energy-usage reports
Popular Models
- Midea U-Shaped Inverter
- Hisense Smart AC Series
Key Takeaways
- Efficient ACs reduce electricity costs dramatically.
- Proper sizing and installation are essential for performance.
- Smart operation and regular maintenance further cut energy use.
Information in this guide includes references to the US Department of Energy .