When you’re heating, ventilation and air conditioning (HVAC) unit is causing frequent problems, it can end up costing more money than you think over time. As a result, it’s important to recognize the signs it’s time to replace your HVAC unit. Here we offer our HVAC replacement FAQs as well as a list of things you should consider: 

  • Things To Consider When Replacing Your HVAC 
  • How Much Does It Cost to Replace An Entire HVAC System? 
  • Is it Cheaper to Replace an HVAC System or Repair It? 
  • How Often Do HVAC Units Need To Be Replaced? 
  • What Size HVAC Unit Do I Need? 
  • What Type of System is Best When Replacing an HVAC Unit? 

Things to Consider When Replacing Your HVAC 

There are several things to consider when replacing an HVAC system including: 

  • Is the system progressively giving you more problems than seem cost-effective to fix? 
  • Are you seeing constant issues with your system’s performance such as becoming noisier, less effective heating, cooling or ventilation, rising energy bills, etc.? 
  • Is it more cost-effective to replace the compressor (or another part) or get a new unit? 
  • What are the benefits of a new unit vs trying to keep the old unit running through repairs or parts replacement? 

The trick to knowing when your HVAC system should be replaced lies in how much it is costing you to keep the old one running. Remember, it’s not just about the cost-of-service calls and parts, but also about efficiency and lower operating costs in the long run. You might be surprised how much money you can save over the time spent in your home when replacing heating and air conditioning systems with a new, high-efficiency unit. 

How Much Does It Cost to Replace An Entire HVAC System? 

There are many factors contributing to how much it costs to replace an entire HVAC system including: 

  • The complexity of the installation 
  • Size of your home 
  • Additional features such as an air purifier or humidifier 
  • Type of system 

The cost includes not just the system, but also labour, and additional parts and materials needed. 

Is it Cheaper to Replace an HVAC System or Repair It? 

It’s a good idea to add up the costs you’ve spent so far on repairs and maintenance when thinking about replacing an old HVAC system. This is important because one thing homeowners often overlook is not just how much an efficient unit saves on energy costs, but also on repairs and maintenance.  

Remember, a new unit comes with a warranty on parts and labour, which adds to your savings over the duration of the warranty period. As well, because it is new, you won’t have to contend with repairs for many years. Maintenance is included in the warranty as well, which helps prolong the life even further. 

How Often Does HVAC Need To Be Replaced? 

HVAC systems last about 15 years or so (depending on the unit). They can last even longer with proper maintenance. That said, a good rule of thumb is to look at not just age, but how often you are calling for repairs. The more frequent the service calls, the more likely it is time for a replacement. Another consideration is efficiency. The age of your unit along with its energy efficiency contributes to varying energy consumption. If you notice a change in your energy bills, especially with a change of the seasons, it could be related to an inefficient HVAC system. 

What Size HVAC Unit Do I Need? 

Your HVAC technician will consider the size of your home and make a recommendation on the right size. This is key to efficiency as a small unit has to be run more often, and a large one will be constantly turning on and off, which are both energy wasters. 

What Type of System is Best When Replacing an HVAC Unit? 

It all depends on your heating and cooling needs, space in your home and budget. An HVAC professional can assess your home, discuss your needs and recommend the best HVAC unit for your home and family. 

Speak to the Dunn Heating ClimateCare team to assess your current system and offer recommendations about the cost and types of HVAC systems available.  


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