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Air Conditioner Replacement Guide: Key Factors to Consider

Replacing an air conditioning (AC) unit is a significant investment for homeowners. It is essential to consider several factors before deciding which unit to buy.

Here are six essential factors to consider when replacing your AC unit.

1. Age of the Current AC Unit

The age of your current AC unit is important to consider when replacing it. As mentioned earlier, most AC units have an average lifespan of 10 to 15 years. If your AC unit is beyond its useful life, it may be time to replace it. Older units tend to be less efficient and may require frequent repairs.

2. Size of the AC Unit

The size of your AC unit is another critical factor to consider when replacing it. An AC unit that is too small will not be able to cool your home effectively, while an AC unit that is too large will result in higher energy bills. To determine the right size of the AC unit, you need to calculate the square footage of your home.

3. Energy Efficiency

Energy efficiency is a crucial factor to consider when replacing your AC unit. Newer AC units are more energy-efficient than older models, saving you money on your energy bills. Energy-efficient AC units have a higher SEER (Seasonal Energy Efficiency Ratio) rating, which means they use less energy to cool your home.

4. Type of AC Unit

Different types of AC units are available in the market, and each has advantages and disadvantages. The most common types of AC units are central air conditioning, ductless mini-split systems, and window units.

Central air conditioning is the most common type of AC unit and is suitable for larger homes. It uses a system of ducts to distribute cool air throughout your home. Central air conditioning units are expensive to install but energy-efficient and require minimal maintenance.

Ductless mini-split systems are ideal for smaller homes and can be installed in individual rooms. They are energy-efficient and offer more flexibility in terms of zoning. You can control each room’s temperature separately, saving you money on your energy bills.

Window units are suitable for small spaces and are affordable. They are easy to install and require minimal maintenance. However, they are not as energy-efficient as central air conditioning or ductless mini-split systems and can be noisy.

5. Cost

The cost of the AC unit is an essential factor to consider when replacing it. AC units can be expensive, and you must ensure you get value for your money. The cost of the AC unit will depend on the size, type, and energy efficiency. You need to consider the installation cost, which can vary depending on the complexity of the installation. 

6. Installation and Maintenance

The installation and maintenance requirements of the AC unit are also important factors to consider when replacing it. You need to hire a professional HVAC technician to install the unit to ensure it is done correctly. Improper installation can result in poor performance and frequent breakdowns. Regular maintenance is necessary to keep the unit in good working condition. 


Consider the age of the current unit, size of the unit, energy efficiency, type of AC unit, cost, installation, and maintenance requirements. Consult an HVAC professional to determine the best unit for your home and budget. You can save money on your energy bills by choosing the right AC unit and enjoy a comfortable home.

Are you looking for expert AC installation in Mississauga? At Furnace King Home Services, our professionals prioritize your comfort and budget by recommending the best AC unit to meet your needs. Contact us today!