How to Choose the Right Size AC Unit for Your Broward County Home

One of the biggest mistakes homeowners make when replacing their air conditioner is choosing the wrong size unit. In Broward County, where your AC runs nearly year-round, getting the size right is critical for comfort, efficiency, and longevity. Here's everything you need to know.

Why AC Size Matters in South Florida

Air conditioner capacity is measured in tons (1 ton = 12,000 BTUs per hour). Choosing the correct tonnage isn't as simple as picking the biggest unit you can afford. In fact, an oversized AC can cause just as many problems as an undersized one — especially in the hot, humid climate of Fort Lauderdale, Hollywood, and Pembroke Pines.

Problems With an Oversized AC

Many homeowners assume bigger is better, but an oversized unit creates serious issues:

Short cycling — The system cools too quickly, shutting off before it can properly dehumidify the air. In Broward County's 80-90% humidity, this means your home feels cold and clammy.
Higher energy bills — Frequent start-stop cycles consume more electricity than steady operation.
Premature wear — The compressor and other components wear out faster from constant cycling, shortening the system's lifespan.
Uneven temperatures — Rooms closest to the air handler get blasted while distant rooms stay warm.

Problems With an Undersized AC

An undersized unit has its own set of issues for South Florida homes:

Runs constantly — The system can never reach the set temperature, running 24/7 and driving up electricity costs.
Can't keep up with peak heat — During July and August in Coral Springs, Plantation, and Davie, an undersized unit simply can't maintain comfortable temperatures.
Excessive wear and tear — Running continuously puts enormous strain on all components.
Poor humidity control — While it runs constantly, it may still struggle to adequately dehumidify your home.

Factors That Determine the Right AC Size

A proper AC sizing calculation (called a Manual J load calculation) considers:

Square footage — The starting point, but far from the only factor.
Ceiling height — Higher ceilings mean more volume to cool.
Insulation quality — Many older homes in Miramar, Sunrise, and Tamarac have inadequate attic insulation.
Window size and orientation — South and west-facing windows in South Florida let in tremendous solar heat gain.
Ductwork condition — Leaky or undersized ducts affect how much cooling reaches each room.
Number of occupants — Each person adds roughly 400 BTUs of heat to the space.
Appliance and lighting heat — Kitchens, laundry rooms, and rooms with lots of electronics generate additional heat.
Roof color and material — Dark roofs common in Broward County absorb significantly more heat than lighter options.

General Sizing Guidelines for South Florida

While every home is different, here are rough guidelines for Broward County homes:

1,000-1,200 sq ft: 2 - 2.5 tons
1,200-1,600 sq ft: 2.5 - 3 tons
1,600-2,100 sq ft: 3 - 3.5 tons
2,100-2,600 sq ft: 3.5 - 4 tons
2,600-3,200 sq ft: 4 - 5 tons

These are estimates only. A professional Manual J calculation accounts for all the variables specific to your home and is the only way to ensure proper sizing.

Why You Need a Professional Assessment

At Koala Coolin, every AC installation begins with a thorough assessment of your home. Our certified technicians perform proper load calculations to recommend the exact right system size. We never upsell oversized equipment — because we know it will cause problems and dissatisfied customers.

We serve homeowners throughout Broward County including Fort Lauderdale, Hollywood, Pembroke Pines, Coral Springs, Plantation, Davie, Weston, Miramar, and all surrounding areas.

Call (754) 293-1195 today for a free in-home assessment and quote on a perfectly sized AC system for your home.

How to Choose the Right Size AC Unit for Your Broward County Home