Ideal Heating & Air Conditioning Service

When searching for the most energy-efficient air conditioners in Ontario, Canada, it’s essential to consider models with high Seasonal Energy Efficiency Ratio (SEER) ratings and ENERGY STAR® certification. In this blog from Ideal Heating & Air Conditioning, we’ll look at the five top-rated energy-efficient air conditioners suitable for Ontario’s climate.

1) Comparing the 5 Most Energy-Efficient Air Conditioners

2) Details About the 5 Most Energy-Efficient Air Conditioners 

3) How An Air Conditioner’s Efficiency Is Measured

While research is good, you can also speak with one of Ideal’s staff members to determine which of these most energy-efficient air conditioners suits you best. Ideal will help you find an HVAC solution for your home that meets your unique needs and budget. Contact us at Ideal today and start planning now under the guidance of a professional.

Man working on a laptop on sofa with air conditioner on the wall of home.

Find the most energy-efficient air conditioners with advice from Ideal Heating & Air Conditioning.

Finding the Most Energy-Efficient Air Conditioners

1) Comparing the 5 Most Energy-Efficient Air Conditioners

Below is a detailed comparison chart for the 5 most energy-efficient air conditioners. We’ve compared these units based on factors that balance technical specifications with practical considerations, making it easier for consumers like you to select the best, t0p-performing air conditioner for your home, lifestyle, comfort, and budget. Here’s why each factor is important:

SEER Rating

SEER (Seasonal Energy Efficiency Ratio) measures the cooling efficiency of an air conditioner. A higher SEER rating means better energy efficiency, lower energy bills, and reduced environmental impact. It’s a critical factor in a region like Ontario, where cooling costs can add up during summer.

Key Features

Features like variable-speed compressors, Wi-Fi-enabled controls, or advanced humidity management directly impact comfort, usability, and overall performance. These are key differentiators between models and help you choose what best suits your needs.

Noise Level (Decibels)

Quiet operation is a significant comfort factor, especially for units installed near bedrooms or living spaces. Noisy air conditioners can disrupt daily life, so quieter models are highly valued.

Price Range (CAD)

Budget is a major consideration for most homeowners. This factor helps buyers understand upfront costs and whether a unit fits within their financial plans.

Lastly, we’ve summarized the standout benefits of each model to help provide you with a clear picture of its value proposition. This gives you the context for why a specific model might be worth your investment.

Model
SEER Rating
Key Features
Noise Level (Decibels)
Price Range (CAD)*
Why Choose It?

1. Lennox XC25

Up to 26

Variable speed compressor, ultra-quiet operation, ENERGY STAR® certified

As low as 59 dB

$5,500–$7,500+

Exceptional efficiency, best for reducing energy costs and staying eco-friendly.

2. Carrier Infinity® 26 with Greenspeed®

Up to 24 SEER2

Variable-speed compressor, advanced humidity control, Greenspeed® Intelligence, ENERGY STAR® certified

$6,000–$9,000+

$4,500–$7,000+

Industry-leading humidity control, ultra-quiet operation, and energy savings with cutting-edge technology.

3. Bryant Evolution Extreme 26

Up to 26

Variable-speed inverter technology, Wi-Fi-enabled controls, ENERGY STAR® certified

As low as 51 dB

$6,000–$8,500+

Industry-leading efficiency, advanced controls, and ultra-quiet operation for premium comfort.

4. Trane XV20i

Up to 22

Variable-speed compressor, adaptive cooling technology

55–75 dB

$5,000–$8,000+

Quiet and efficient, ideal for homeowners who want adaptive, long-term savings.

5. American Standard Platinum 20

Up to 22

AccuComfort™ variable-speed technology, precise temperature control

55–70 dB

$5,000–$7,500+

Delivers excellent energy efficiency and customizable comfort for Ontario’s climate.

Please note that prices vary depending on the size of the unit, installation costs, and dealer location. Always consult your local HVAC professionals for exact quotes.

2) Details About the 5 Most Energy-Efficient Air Conditioners 

1. Lennox XC25

The Lennox XC25 is one of the most energy-efficient air conditioners on the market, boasting an impressive SEER rating of up to 26. Its variable-speed compressor allows it to adapt seamlessly to changing cooling demands, ensuring optimal performance while minimizing energy use. The XC25 is ENERGY STAR® certified and operates at ultra-low noise levels, as quiet as 59 decibels, making it a great choice for homeowners who value both efficiency and peace of mind. Designed for precision, it provides consistent temperatures, even on the hottest days, and integrates easily with Lennox’s iComfort® S30 smart thermostat for advanced control.

2. Carrier Infinity 26

The Carrier Infinity® 26 with Greenspeed® Intelligence represents the pinnacle of energy efficiency and modern cooling technology. With a SEER2 rating of up to 24, this model delivers impressive energy savings while maintaining consistent indoor comfort. Its variable-speed compressor adapts precisely to cooling needs, ensuring both efficiency and quiet operation, with noise levels as low as 51 decibels. This model excels in humidity control, capable of removing up to 400% more moisture than standard systems, which is especially valuable during Ontario’s humid summers. Greenspeed® Intelligence and ENERGY STAR® certification make it a top choice for homeowners seeking cutting-edge performance, smart-home integration, and superior comfort.

 3. Bryant Evolution™ Extreme 26

The Bryant Evolution™ Extreme 26 stands out for its cutting-edge variable-speed inverter technology, offering a remarkable SEER rating of up to 26. This model delivers exceptional energy savings and ultra-precise temperature control, ensuring year-round comfort. It operates with whisper-quiet noise levels as low as 51 decibels, making it one of the quietest air conditioners available. With Wi-Fi-enabled controls and compatibility with the Bryant Housewise™ thermostat, this air conditioner offers convenience and smart-home integration. ENERGY STAR® certified and built to last, the Evolution™ Extreme 26 is perfect for homeowners who want top-tier performance and advanced features.

4. Trane XV20i

The Trane XV20i is a versatile and reliable air conditioner with a SEER rating of up to 22, ensuring excellent energy efficiency and cost savings. Its variable-speed compressor adjusts precisely to cooling demands, maintaining consistent indoor temperatures while minimizing energy use. This model is known for its durability and quiet operation, with noise levels as low as 55 decibels, making it an ideal choice for noise-sensitive areas. The XV20i is ENERGY STAR® certified and designed to work seamlessly with Trane’s ComfortLink™ II smart thermostat, offering enhanced comfort and control for homeowners.

 5. American Standard Platinum 20

The American Standard Platinum 20 is a premium air conditioner with a SEER rating of up to 22, designed for energy efficiency and exceptional cooling performance. Featuring AccuComfort™ variable-speed technology, it delivers precise temperature control and adjusts smoothly to meet cooling needs. The Platinum 20 operates quietly, with noise levels as low as 55 decibels, and is ENERGY STAR® certified for maximum energy savings. Its durable construction and compatibility with advanced thermostats make it a dependable choice for Ontario homeowners who want consistent comfort in varying weather conditions.

While the above models are among the top most energy-efficient air conditioners, one other honourable mention is the Goodman GSXC18. It has a seer rating of up to 19, a two-stage compressor, ComfortBridge™ technology for enhanced efficiency, and is a budget-friendly, reliable choice with solid performance.

3) How An Air Conditioner's Efficiency Is Measured

Air conditioner efficiency is measured using standardized ratings, primarily the SEER, SEER2, and EER metrics, which evaluate how effectively an air conditioner converts energy into cooling output. Here’s a breakdown of how these ratings work:

SEER (Seasonal Energy Efficiency Ratio)

SEER indicates the cooling efficiency of an air conditioner over an entire cooling season. It represents the ratio of the total cooling output (in BTUs) to the total energy consumed (in watt-hours). The formula for measuring it is Total Cooling Output (BTUs) ÷ Total Energy Used (Watt-hours). 

A higher SEER rating means greater energy efficiency and lower electricity costs. Modern air conditioners in Canada typically have SEER ratings ranging from 13 (minimum standard) to 26 (high efficiency). 

Note that SEER assumes average conditions and doesn’t account for real-time performance variations, which is why complementary metrics like SEER2 and EER exist.

SEER2 (Updated SEER Standard)

SEER2 is an updated version of SEER, introduced in 2023, to reflect real-world conditions more accurately. It uses revised testing procedures that include higher static pressures to simulate how HVAC systems operate in actual homes. 

SEER2 ratings are slightly lower than SEER ratings for the same system because of the stricter testing standards. This helps consumers better understand real-world efficiency.

EER (Energy Efficiency Ratio)

EER evaluates an air conditioner’s efficiency at a specific outdoor temperature (usually 95°F/35°C), indoor temperature, and humidity level. It reflects the cooling output divided by energy input during peak demand periods. 

EER is useful for understanding performance under constant, extreme conditions, making it valuable for regions with very hot summers.

Other Factors Impacting Efficiency
  • Variable-Speed Compressors:
    These adjust their speed to match cooling needs, improving energy efficiency compared to single- or two-stage compressors.

  • Smart Thermostats:
    Integration with smart home systems allows better temperature control, reducing unnecessary energy use.

  • ENERGY STAR® Certification:
    Units with this certification meet strict energy efficiency guidelines set by the Environmental Protection Agency (EPA) or Natural Resources Canada.

Why Efficiency Matters in Ontario

Ontario has a mix of warm summers and relatively high electricity costs, so choosing an air conditioner with a high SEER/SEER2 or EER rating can significantly reduce cooling costs and environmental impact.

Ideal Heating and Air Conditioning is equipped to help you find the most energy-efficient air conditioners by offering expert guidance on selecting models that balance performance with energy savings. Choosing Ideal Heating and Air Conditioning ensures that you’re getting a reliable, knowledgeable, and locally-based partner who can help you save money and energy in the long run. Contact us today and discover our most energy-efficient air conditioners!

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"I have been using Ideal Heating and Air Conditioning for 10 years. Our AC recently stopped working and Ideal Heating and Air Conditioning came to our rescue asap, replacing the system in 24 hours!!!! It was a heatwave and we were having a big party. We were beyond grateful to Amit. I highly recommend this company!"
- Marla Freedman

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