What Size HVAC System Do I Need? A Guide for Homeowners in Austell, GA and Surrounding Areas
Choosing the right size HVAC system is one of the most important decisions homeowners can make when it comes to comfort and energy efficiency. Whether you're replacing an old unit or installing a new system in your home, size matters—and bigger isn’t always better. If you live in Austell, Douglasville, Powder Springs, or the surrounding area, the expert team at Hammond Services is here to help you make the right choice.
Why HVAC Size Matters
An HVAC system that's too small will struggle to keep your home comfortable during extreme temperatures, running constantly and wearing itself out early. On the other hand, a system that’s too large may cool or heat your home too quickly, causing frequent on/off cycling that leads to poor humidity control and higher energy bills. Proper sizing is critical for:
- Energy Efficiency – Right-sized systems use less power
- Comfort – Consistent temperatures and better humidity control
- System Longevity – Avoiding unnecessary wear and tear
- Cost Savings – Reduced utility bills and fewer repairs
Factors That Affect HVAC Sizing
There’s no one-size-fits-all answer when it comes to HVAC systems. Professionals use a process called a Manual J Load Calculation to determine the ideal capacity for your home. This calculation takes into account:
- Square footage of your home
- Ceiling height
- Number and placement of windows
- Insulation levels
- Local climate (like our hot, humid summers in Georgia)
- Number of people living in the home
- Heat-generating appliances and lighting
Simply relying on square footage alone can lead to oversizing or undersizing, which is why it’s so important to have an expert evaluate your specific needs.
Common HVAC Sizes and What They Mean
HVAC capacity is typically measured in tons, with one ton equal to the ability to cool 12,000 BTUs (British Thermal Units) per hour. Most residential homes use systems ranging from 1.5 to 5 tons. But again, the correct size for your home depends on the variables listed above.
Don’t Guess—Get Expert Help from Hammond Services
Determining the right HVAC system size is too important to leave to chance. The licensed professionals at Hammond Services specialize in HVAC installations across Austell, Douglasville, Mableton, and surrounding communities. Our team
uses advanced diagnostics and proven calculations to ensure your new system is perfectly matched to your home’s unique requirements.
We also offer a full range of plumbing
and electrical services, so we’re your one-stop shop for complete home comfort.
Ready for a More Comfortable, Efficient Home?
If you're considering a new HVAC system
or want to make sure your current one is the right fit, contact Hammond Services
today. Our experienced technicians will provide a customized assessment and recommend the ideal solution for your home.
Call now and schedule your consultation in Austell, GA or surrounding areas.

Summers in Georgia can be intense. Brutal heat and high humidity often make your home feel like a sauna. With air conditioning demands soaring, this can overload the power grid, leading to brownouts, partial power reductions that dim your lights and shut down non-essential appliances. While brownouts aren't as severe as blackouts, they can still cause disruptions, especially during Georgia’s hottest months. For tips on how to prepare for power outages, including stockpiling essential items, check out the Power Outage Preparedness Tips from Georgia Electric Membership Corporation . The Challenge of Summer Brownouts in Georgia Brownouts occur when the electrical grid becomes overloaded, and utility providers reduce the voltage temporarily to avoid a complete power failure. This is especially common during Georgia’s brutal heatwaves and thunderstorms, two weather events we see all too often in the summer. With the extreme heat, high humidity, and unpredictable storms, having reliable power becomes crucial for Georgia homeowners. Although a short power dip might seem minor, brownouts that last for hours can have serious consequences. Here’s why: 1. Health Risks for Pets and Babies The heat can be dangerous, particularly for pets and young children. Without air conditioning or fans, temperatures inside your home can rise quickly. Pets, especially those with thick fur, are at risk of heatstroke and dehydration. Babies, who have a harder time regulating their body temperature, are also vulnerable to overheating, which can lead to serious health issues. 2. Impact on Medical Devices For people who rely on powered medical devices like oxygen concentrators, CPAP machines, or refrigerated medications, brownouts can be life-threatening. The high humidity in Georgia can make respiratory conditions worse, making it even more critical to maintain a steady power supply for medical needs. 3. Food Spoilage & Home Disruptions During a brownout, refrigerators and freezers may not run at full power, which can cause food to spoil more quickly. Perishable items like dairy, meat, and seafood can become unsafe to eat in just a few hours without consistent cooling. This can lead to wasted groceries and potential health risks if spoiled food is consumed. Investing in a backup generator can help keep your refrigerator running and prevent costly food loss during extended power disruptions. Preparing for Power Disruptions Year-Round Although summer brownouts are a common issue, power disruptions can also occur during other seasons. For example, winter blackouts in Georgia can bring dangerous cold temperatures and heating system problems. For more insights on preparing for power outages throughout the year, check out our blog on Generac Generator Maintenance: Keeping the Power On When It Matters Most to ensure you're ready for any unexpected disruptions. How to Prepare for Brownouts in Georgia The best way to protect your home from the effects of summer brownouts is to prepare in advance. One of the most effective solutions is investing in a generato r. Whether you choose a whole-home standby generator that automatically kicks in when power drops, or a portable generator to keep essential appliances running, having a backup power source can keep you out of the dark when the grid goes down. Here’s how you can be ready: Backup Generators: A whole-home generator is a reliable way to keep essential systems like air conditioning, refrigeration, and medical devices powered during brownouts. These generators automatically turn on when the power goes out, ensuring your home stays functional. Portable Generators: If a whole-home generator isn’t in your budget, a portable generator can still power critical appliances, like your fridge and AC, during a brownout. Energy Conservation: Being mindful of energy usage, like running appliances during off-peak hours or keeping blinds closed to block out heat, can help reduce stress on the power grid. Electrical Inspections & Repairs: It’s also a good idea to have an electrical inspection done to make sure your home’s wiring can handle the additional load. If there are any issues, electrical repairs can ensure your system is ready for whatever the summer brings. Stay Ahead of Summer Outages in Georgia Summer brownouts are a reality here in Georgia, but with the right preparation, you can minimize the impact on your home and family. Investing in a generator, practicing energy-saving habits, and scheduling an electrical inspection will help you stay cool, keep your loved ones safe, and avoid the frustration of power interruptions. Don’t wait until the next heatwave. Take action now to stay powered all summer long. Ready to Stay Powered All Summer? Don’t let summer brownouts disrupt your comfort or safety. For expert advice on generators, electrical inspections, and electrical repairs in Griffin, Newnan, Stockbridge, or nearby areas, Hammond Services here to help! We’ll ensure your home stays cool, secure, and fully operational, no matter what the weather brings. Contact us today to schedule your services and enjoy a worry-free, comfortable home this season!