What Size Air Conditioner Do I Need for My Home?
Bigger isn’t better when it comes to AC. Here’s how proper sizing actually works, and why guessing from square footage alone leads to a system that disappoints.
Why isn’t square footage enough?
Square footage is only one piece. Two homes the same size can need very different systems depending on insulation, window count and direction, ceiling height, ductwork, and how much sun they get.
Sizing from square footage alone is a rule of thumb, and rules of thumb are how homes end up with the wrong system.
What is a Manual J load calculation?
Manual J is the industry-standard method for calculating exactly how much heating and cooling a specific home needs. It factors in all the variables that actually affect the load, not just floor area.
It’s the difference between a system chosen for your home and a system chosen for a guess. We run a complimentary load calculation on every home, and a full Manual J whenever the home or the system calls for it, at no extra charge.
What’s wrong with an oversized system?
It’s a surprisingly common mistake. An oversized AC cools the air fast but shuts off before it removes humidity, so your home feels cold and clammy. It also short cycles, which wastes energy and wears out parts.
Bigger isn’t better. Right-sized is better.
What about an undersized system?
An undersized unit runs constantly trying to keep up, never quite reaching your set temperature on the hottest days, and running up your bill while it struggles.
Neither extreme serves you. The goal is a system matched precisely to your home.
If you’re shopping for a new system, insist on a proper load calculation, and we’ll bring one to the table automatically. Call or text to set up a free in-home assessment.