When it comes time to replace your furnace or air conditioner, one of the first questions homeowners ask is: “What size unit do I need?” Choosing the right size is critical. An HVAC system that’s too small will struggle to keep your home comfortable, while an oversized system can waste energy, cause uneven temperatures, and wear out faster.
At Sears Heating & Cooling, we help Central Ohio families find the perfect fit for their home and budget. Here’s what you need to know about furnace and AC sizing.
Why Size Matters in HVAC
- Efficiency: A properly sized unit runs in steady cycles, keeping energy bills lower.
- Comfort: The right size ensures consistent heating and cooling throughout your home.
- Durability: An oversized system tends to short-cycle (turn on and off too often), leading to more repairs and a shorter lifespan.
- Air Quality: Correct sizing allows for better humidity control and filtration.
Factors That Determine the Right Size
There’s no one-size-fits-all answer, but here are the main factors HVAC professionals look at when recommending a furnace or AC:
- Square Footage of Your Home
As a rough guide for Central Ohio homes:
- Heating: Most homes need about 30–32 BTUs per square foot.
- Cooling: Most homes need about 16 BTUs per square foot.
👉 Example: A 2,000 sq. ft. home may need roughly 60,000–64,000 BTUs for heating, and about 32,000 BTUs for cooling.
- Climate
Ohio’s cold winters and humid summers mean your system must handle both ends of the spectrum.
- Insulation & Windows
Homes with poor insulation or older, drafty windows may require more capacity to stay comfortable.
- Ceiling Height & Layout
High ceilings, open floor plans, and multiple stories all affect airflow and system size.
- Number of Occupants & Appliances
More people and more heat-producing appliances can increase cooling needs.
Why Online “Size Calculators” Aren’t Enough
While online charts and calculators can give you a ballpark estimate, they don’t take into account the unique features of your home. An experienced HVAC professional will evaluate your home and recommend the right system based on real-world conditions.
What Happens If You Pick the Wrong Size?
- Too Small: Your system runs constantly, driving up utility bills and still leaving you uncomfortable.
- Too Large: You’ll deal with hot and cold spots, excess humidity, noisy cycling, and higher repair costs.
Choosing the Right Partner
Selecting the correct furnace or AC is about more than just the equipment—it’s about expert installation and ongoing care. Since 1950, Sears Heating & Cooling has been helping Central Ohio homeowners stay comfortable year-round with honest advice and top-quality service.
Ready to Find the Right Size System for Your Home?
Don’t leave comfort up to chance. Schedule a free in-home estimate with Sears Heating & Cooling, and let our experts match your home with the perfect system.
👉 Call 614-475-1800 or request service online today.
