What should I look for when choosing a new air conditioner?

Sizing (BTU/h)

Proper Match: This is the most critical factor. An oversized AC will cycle on and off frequently leading to higher energy bills, poor dehumidification, and shorter equipment life. An undersized unit won’t cool effectively on hot days. Our team can help you determine what works best in your home.

Professional Load Calculation: Insist on a Manual J (or similar ACCA-approved) load calculation performed by our qualified HVAC technicians. This considers factors like your home’s square footage, ceiling height, insulation, window types and orientation, local climate, and number of occupants.

Common Misconceptions: Don’t rely solely on square footage charts; they are only rough estimates.

Energy Efficiency Ratings

SEER2 (Seasonal Energy Efficiency Ratio 2): This is the current standard for central air conditioners (as of 2023). Higher SEER2 ratings indicate greater energy efficiency and lower operating costs. Minimum SEER2 ratings vary by region (e.g., 13.4 SEER2 for northern states, 14.3 SEER2 for southern states).

EER2 (Energy Efficiency Ratio 2): Measures efficiency at a single outdoor temperature (95°F/35°C). Important for peak performance on the hottest days.

HSPF2 (Heating Seasonal Performance Factor 2): If you’re considering a heat pump (which provides both cooling and heating), look at the HSPF2 rating for heating efficiency.

Type of Air Conditioner

Central Air Conditioner (Split System): Most common for whole-home cooling. Consists of an outdoor condenser unit and an indoor evaporator coil connected to your furnace/air handler.

Ductless Mini-Split Systems: Ideal for homes without existing ductwork, additions, or zoned cooling. They have an outdoor unit connected to one or more indoor units via a small conduit.

Window or Portable Units: Best for cooling single rooms. Less efficient and noisier than central or mini-split systems.

Geothermal Heat Pumps: Highly efficient, but significantly more expensive to install. They use the stable underground temperature to exchange heat. It sounds like a contradiction, but the heat pump can both heat and cool your home!

Compressor Type

Single-Stage: On or off operation. Less efficient and less precise temperature control.

Two-Stage: Operates at two speeds (usually 70% and 100%). More efficient and better at maintaining consistent temperatures and dehumidifying.

Variable-Speed/Inverter-Driven: Continuously adjusts capacity to match cooling needs. Most efficient, quietest, and provides the best dehumidification and comfort.

Noise Levels (dB)

Outdoor Unit: Look for lower decibel (dB) ratings, especially if the unit will be near windows, patios, or neighbors. Modern units are much quieter.

Indoor Unit: Relevant for ductless mini-splits.

Features and Technologies

Thermostat Compatibility: Ensure compatibility with smart thermostats for remote control, scheduling, and energy monitoring.

Dehumidification Capabilities: Look for features like variable-speed compressors or separate dehumidification modes, especially in humid climates.

Zoning Capabilities: If you want to cool different areas of your home to different temperatures, consider a system that supports zoning.

Air Quality Enhancements: Some systems can be integrated with air purifiers, UV lamps, or enhanced filtration systems.

Smart Features/Connectivity: Wi-Fi enabled, app control, diagnostic capabilities.

Brand Reputation and Warranty

Reputable Brands: Choose well-established brands known for reliability and customer service. Lennox offers a “good, better, best” series to allow each homeowner to select the efficiency and affordability level they want.

Warranty: Compare warranties on compressor, parts, and labor. A good warranty provides peace of mind.

Dealer Reputation: The quality of installation is as important as the equipment itself. Choose a reputable, licensed, and insured HVAC contractor with good reviews (check out our great Google Reviews!).

Installation Quality

Professional Installation: This cannot be overstressed. Poor installation can negate the benefits of a high-efficiency unit.

Ductwork Inspection: Ensure the technician inspects and seals your existing ductwork for leaks. Leaky ducts can significantly reduce efficiency.

Refrigerant Charge: Proper refrigerant charge is critical for performance and efficiency.

Cost Considerations

Initial Purchase Price: Varies widely based on type, efficiency, and features.

Installation Costs: A significant portion of the total cost.

Operating Costs: Long-term energy bills are influenced by SEER2/EER2 ratings.

Rebates and Incentives: Check for local utility rebates, federal tax credits, or our manufacturer incentives for high-efficiency units.

Refrigerant Type

R-410A (Puron): Currently the most common refrigerant. However, it’s being phased out due to its high Global Warming Potential (GWP).

Newer Refrigerants (e.g., R-32, R-454B): Future-proof your investment by considering units that use or will use lower-GWP refrigerants as they become more common. Check local regulations and availability.