What Size AC Do I Need for My House? Your Questions Answered
An improperly sized cooling system wastes energy and money. Not only will your unit not work as well, but you’ll also eventually face issues like short-cycling and rising monthly bills.
What size AC do you need for your house? The answer depends on factors like the size, layout, local climate, ductwork, and lifestyle needs. This guide also provides more detail about the factors to consider when adding or upgrading an AC unit.
Our experienced technicians at Aksarben®/ARS® can also help determine the proper size for your home. We have been a staple in the Nebraska community for over four decades. Our team ensures that homeowners get more than an advanced cooling installation: they get a lifelong partner for all of their heating, cooling, and plumbing needs.
Do you need help comparing the different options or reviewing an AC unit size chart? Call us today to speak with a member of our staff!
Understanding AC Sizing: Energy-Efficiency Ratings
Energy-efficiency ratings help you understand the trade-off between cool air and energy usage. BTUs, or British Thermal Units, measure how much energy your air conditioning system uses to adjust your home's temperature in an hour.
The size of the living space impacts the ideal BTU ranges for heating and cooling. For example, a space that’s between 400 and 500 square feet will need a cooling system with a BTU rating of roughly 12,000. A larger space of around 1,200 to 1,500 feet may need up to 30,000 BTUs.
To get started in figuring out what size AC you need for your house, try a BTU calculator. You can also review Energy Star’s Sizing Guidelines for more climate-specific tips.
Standard Factors for Calculating the Ideal AC Size
BTUs are only the beginning of determining the right cooling system size. Several factors impact the energy efficiency and performance of your HVAC system, including layout, climate, and ductwork.
Ductwork
Do you have small, narrow ducts or larger ductwork? Since ducts move air throughout the home, a technician will need to review their size and match it to your cooling system’s capacity.
Climate
The climate in Nebraska ranges from hot and humid to more arid. A wetter climate tends to be harder on your air conditioner because it has to work to remove excess moisture. A humid house also feels warmer than a drier one, so you may need to adjust the thermostat more frequently.
Home Size and Layout
A multi-story home with an existing cooling system will have completely different cooling needs from a single-story home with no ductwork. In most cases, a larger house requires a larger cooling system to keep up.
Want to learn more about energy-efficiency ratings and sizing? Call us with any questions, and we’ll be happy to help.
Additional Factors That Affect AC Size
A new AC or HVAC installation will depend on a few additional factors. You may be surprised to learn that even your window placement and sun exposure affect what size AC you need for your house.
Insulation Quality
Do you have a drafty house with deteriorating insulation? You may need a larger cooling system to address this issue.
Window Size and Placement
Does your home feature multiple large windows that allow solar heat gain? The windows not only affect how much heat travels through your home but also how well insulated it is.
Ceiling Height
The higher the ceiling, the longer it takes for your home to cool down. While heat rises, cooler air sinks, so a house with higher ceilings will usually need a larger size.
Number of Occupants
When more people live in a home, they tend to produce more heat, requiring a system that can maintain a consistent temperature.
Curious to learn about the average sun exposure or insulation quality in your house, and how those factors impact cooling? Contact us to schedule an in-home consultation.
3 Main Consequences of the Wrong AC Size
The wrong AC unit size can have long-term financial consequences. While these issues don’t always result in outright failure, they can wear out your system prematurely and affect everyday comfort.
1. Higher Energy Bills
A cooling system that’s too large or too small will start short-cycling, which means it turns on and off rapidly rather than completing a full cooling cycle. Since this unit uses more energy at startup, short-cycling wastes energy and increases monthly bills.
2. Slower Cooling
You shouldn’t have to wait hours for your home to cool down. An improperly sized unit will take far too long to do its job, especially if the home lacks adequate ductwork or insulation.
3. Humidity Problems
Your cooling system reduces the indoor temperature, filters indoor air pollutants, and controls humidity levels. If it’s the wrong size, it may struggle to remove excess moisture and cool down the space, resulting in warm, muggy air.
If you’re dealing with any of these issues, call us to take a closer look at the cooling unit.
When to Consult an HVAC Professional
What size AC unit do you need for your house? One of our helpful technicians will bring the tools and expertise to determine the right size. While homeowners can make a rough estimate based on home size or climate, a professional can go even further with advanced equipment, like Manual J.
Manual J is an industry-standard HVAC load calculation tool that narrows down the right size, efficiency rating, and features for your home. It assesses key details such as insulation, window orientation, tonnage for air conditioners, and other factors.
Contact Aksarben Today to Get Your AC Unit Size
What size AC do you need for your house? You don’t need to guess. Local homeowners have been relying on Aksarben for decades, and we can help you determine the right-sized cooling unit for your space.
We also make it easier with flexible service plans, budget-friendly deals, and a team of trained, experienced technicians. Our Exceptional Service Guarantee backs all maintenance, repair, and installation services. Plus, you can join our Pro Service Plan for priority scheduling and service discounts.
With locations across the greater Omaha area, it’s simple to get swift, convenient service at your home. Eager to see what a new cooling system could do for your home’s comfort? Schedule a consultation today!