When you invest in a new air conditioning system, you expect comfort, efficiency and reliability. But what if that brand-new system isn’t performing the way it should?
A well-known utility study out of North Carolina revealed a surprising truth: Nearly nine out of ten HVAC systems are installed incorrectly. That means even the most advanced, high-efficiency equipment can fall short—not because of the equipment itself, but because of how it was installed.
The Most Common Problems
1. Inadequate Airflow from Existing Ductwork
One of the biggest issues is airflow. Many contractors install new systems without properly evaluating the home’s ductwork. They assume it’s correctly sized, but that’s often not the case—especially in older homes.
If ductwork is undersized or poorly designed, your system won’t be able to deliver the right amount of air. This leads to uneven temperatures, reduced efficiency and added strain on the equipment.
2. Improper Refrigerant Charge
Another frequent problem is incorrect refrigerant levels. Too much or too little refrigerant can significantly impact performance, efficiency and system lifespan. Proper charging requires precise measurements and testing—not guesswork.
3. Incorrect System Sizing
Many homeowners believe a bigger system will cool better, but that’s not true. Oversized systems cycle on and off too frequently, which reduces comfort and fails to properly remove humidity. Undersized systems, on the other hand, struggle to keep up during the hottest days.
Correct sizing requires a detailed load calculation based on your home’s unique characteristics—not a rough estimate or a match to your old unit.
Why the Contractor You Choose Matters
The reality is simple: Installation quality is just as important as the equipment itself. Choosing the right contractor can make the difference between years of comfort and constant frustration.
Before moving forward with a replacement, homeowners should ask a few key questions:
- Will you measure and evaluate my ductwork?
Proper airflow starts with properly sized ducts.
- How will you determine the correct system size?
Look for contractors who perform a detailed load calculation.
- What does your installation process include?
A thorough process should include airflow testing, proper refrigerant charging and system performance verification.
- How do you ensure quality?
The best companies follow consistent procedures and use checklists to ensure nothing is overlooked.
- What warranties or guarantees do you provide?
Reputable contractors stand behind their work with strong labor warranties and performance guarantees.
The Bottom Line
A new HVAC system is a major investment, and you deserve to get full value from it. Unfortunately, poor installation practices are far too common—and they can undermine even the best equipment.
By taking the time to choose a qualified contractor and asking the right questions, you can ensure your system is designed and installed properly from day one.
Because when it comes to home comfort, it’s not just about what you install—it’s about how it’s installed.
Willco is a local, family-owned business serving Sussex, Warren and Morris counties since 1988. As a Lennox Premier heating and cooling dealer, they specialize in service, installation and maintenance of residential and commercial systems, as well as provide commercial refrigeration, well pump and drain pump services. Contact Willco at (973) 295-5899 or willcoairconditioning.com.
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