Ductwork Matters: Why a New AC Unit Won’t Work Well with Bad Ducts

Improper Sizing

Indoor comfort needs vary from one household to another. With that said, old ducts were likely sized for the previous, less efficient AC models. If your existing ductwork is over 5 years old, it may be wise to install a new duct system. Before undertaking an AC unit replacement or installation, consult a licensed technician to assess your new high-efficiency system and recommend the perfect duct size for optimal functionality. Air ducts that are too small or too large create an imbalance, resulting in restricted airflow and inefficiency.

Air Leaks

While old ductwork may still function as expected, it is more susceptible to gaps, cracks, and loose connections. This visible damage allows conditioned air to escape before reaching your living spaces, causing the HVAC unit to overwork and use more energy. Research shows that damaged air ducts waste 30% or more of the conditioned air moving through the system, significantly reducing indoor comfort and efficiency.

Poor Designs and Layout

As mentioned, old ducts were sized for less efficient AC systems. Additionally, their designs were suited for outdated air conditioners. If your home’s ductwork is past the end of its life, then the design will not meet modern standards. Excessive length, sharp turns, or crushed sections create high static pressure within the system, forcing the blower to strain, reducing the amount of air reaching your rooms. This not only increases energy bills but also frequent breakdowns and costly AC repairs.

Reduced Lifespan of New AC

A new air conditioning unit can suffer due to pressure imbalance and airflow restrictions within the ductwork, vital components like the blower motor and compressor overwork. This constant pressure leads to premature wear and tear, drastically shortening the lifespan of your new equipment. The most effective way to ensure your AC runs optimally throughout is to invest in a new duct system. AC unit replacement and installation come at a cost, and the last thing you want is a premature replacement due to ductwork issues.

Uneven Cooling/Heating

Bad ducts, whether they are leaking, disconnected, or clogged, cause inadequate distribution of conditioned air. Nothing is more frustrating than leaving a comfortable living room and walking into a cold or hot kitchen. Inconsistent temperatures indoors, despite the new AC’s abilities, indicate old ducts that need attention. Consult a trusted HVAC company to inspect your layout and devise a ductwork installation plan that ensures a seamless integration with the new AC.

When it comes to air conditioner installation projects, addressing the underlying ductwork is key to making the most of your investment. Contact Aire Serv to book an appointment with our electricians and schedule an inspection to determine whether to repair or replace your existing ductwork.