One of the most important questions when replacing your system is "what size air conditioner do I need?" It might be tempting to think bigger is better, but an oversized AC is actually one of the most common — and costly — mistakes, especially in our humid North Carolina climate.
Air conditioner size is measured in tons (a measure of cooling capacity, not weight) or BTUs. As a very rough rule of thumb, homes need roughly one ton of cooling for every 400 to 600 square feet — but that's just a starting point, not an answer.
Here's why oversizing is a problem: an AC that's too big cools the air quickly and shuts off before it has time to pull humidity out of your home. The result is a house that feels cold and clammy, plus extra wear on the equipment from short, frequent cycles. An undersized unit, on the other hand, runs constantly and still can't keep up on the hottest days.
Proper sizing depends on far more than square footage. A technician performs a "Manual J" load calculation that accounts for your home's insulation, windows, ceiling height, sun exposure, ductwork, and our regional climate. Two homes the same size can need very different systems.
The bottom line: don't guess, and don't just match your old unit's size — which may have been wrong to begin with. A proper load calculation ensures you get comfortable, efficient, dependable cooling.
Reinhardt Heating and Air provides free estimates and proper sizing on every system replacement across Lincoln, Gaston, Mecklenburg, and Catawba counties. We'll make sure your new AC is sized right for your home — and your Carolina summers.