Your Comfort Is Our
#1 Priority.
Since 1931 Duncan Heating & Air Conditioning has been delivering quality AC & Heating services in Statesville, NC and surrounding areas. Let's get you comfortable today with 24/7 HVAC Service & Replacement.
Your all in one HVAC Contractor.
At Duncan Heating & Air Conditioning Inc., we firmly believe that no job, regardless of its scale, is beyond our capability or unworthy of our attention. With our unwavering commitment to excellence, we have established ourselves as a trusted name in the heating and air conditioning industry. Whether it's a large-scale commercial project or a minor residential repair, our team of highly skilled professionals is equipped with the knowledge and expertise to handle any task that comes our way. 
Proudly serving the Statesville, NC and Mooresville, NC areas. Click the button below to discover more about our HVAC services.
Quality installs that reduce your energy bill and increase your comfort.
Commercial
Commercial HVAC experts that get the job done right.
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Our Popular Spring HVAC services
Here are some of our popular Spring services. Learn more below.
A Higher Standard of Comfort.
Energy efficient equipment at an affordable price. Click below to learn more about our products and how they can improve your comfort.
Leave Your HVAC Needs To The Pros At Duncan
Trust us to be your all in one HVAC contractor. We are eager to earn your business and improve your comfort.
Maintenance
Protect your investment with seasonal maintenance.
Furnace Repair
Trust us to repair your furnace today.
Sheet Metal
Custom sheet metal for any residential or commercial application.
Common HVAC Questions
Here are some of the most frequently asked heating and air conditioning questions we receive from our customers. Click below to learn the answers to some of our most FAQs here at Duncan Heating & Air Conditioning:
Two Locations. One Great Company.
With two office locations in Statesville, NC and Mooresville, NC our goal is to ensure that we have Iredell County and surrounding areas covered FAST when it comes to your HVAC service. Having two locations allows us to get to your home or office faster with local technicians in place at both our Statesville, NC headquarters and our new Mooresville, NC office. Call today for any heating and air conditioning service you may need, we will get there FAST!
Statesville, NC
Mooresville, NC
Our Blog
Learn more about our tips and services with the Duncan Heating & Air Conditioning blog.
As winter fades and spring begins in Statesville, NC, now is the perfect time to make sure your heating and air conditioning system is ready for the changing temperatures. At Duncan Heating & Air Conditioning, we know how important it is to have a reliable HVAC system that keeps your home comfortable and energy-efficient as the weather warms up. Here are some key steps to prepare your system for spring and beyond. 1. Change Your Air Filters A clean air filter is essential for proper airflow and indoor air quality. Over the winter, filters can become clogged with dust, pet dander, and other debris. Replacing them regularly—at least every 1–3 months—helps your HVAC system run more efficiently and prevents unnecessary strain on your unit. 2. Schedule a Professional Tune-Up Routine maintenance is key to extending the lifespan of your HVAC system and avoiding unexpected breakdowns. A spring tune-up includes: ✔ Checking refrigerant levels ✔ Cleaning the condenser coils ✔ Inspecting the blower motor and electrical components ✔ Ensuring your thermostat is functioning properly ✔ Lubricating moving parts to prevent wear and tear At Duncan Heating & Air Conditioning, our expert technicians can provide a thorough inspection to ensure your system is in top shape for spring and summer. 3. Clean Around Your Outdoor Unit Over the fall and winter, leaves, dirt, and debris can accumulate around your outdoor condenser unit. Clear away any obstructions to ensure proper airflow. Keeping at least two feet of clearance around the unit helps it operate efficiently. 4. Test Your Air Conditioner Before the temperatures rise, it’s a good idea to test your air conditioning system. Turn it on and let it run for a few minutes to check for any unusual noises, weak airflow, or warm air blowing from the vents. If you notice any issues, don’t wait—schedule a service call before peak cooling season arrives. 5. Upgrade Your Thermostat Spring is a great time to upgrade to a programmable or smart thermostat. These devices help regulate temperatures more efficiently, saving you money on energy bills. A smart thermostat can even learn your schedule and adjust settings automatically for optimal comfort and efficiency. Check out our thermostat product page to learn more about some of the smart thermostats we carry and install here at Duncan Heating & Air Conditioning. Schedule Your Spring HVAC Service Today! Getting ahead of HVAC maintenance now will help you avoid costly repairs and uncomfortable breakdowns later in the season. The team at Duncan Heating & Air Conditioning is here to ensure your system is running smoothly and efficiently as spring begins. Call us today to schedule your spring tune-up and enjoy a worry-free transition into warmer weather!
When it comes to keeping your Statesville home warm and comfortable during the colder months, choosing the right heating system is essential. At Duncan Heating & Air Conditioning, we understand that every home and family has unique needs. Let’s break down the differences between gas and electric heat to help you make the best choice for your comfort and budget. Efficiency and Operating Costs One of the biggest considerations when choosing between gas and electric heat is the cost of operation. Natural gas tends to be more cost-effective than electricity, especially during the winter months when heating demands are high. Gas furnaces typically heat a home faster and more efficiently than electric systems, which can mean lower energy bills in the long run. However, electric heating systems have their own advantages. They are generally less expensive to install and require less maintenance over time. Plus, with the mild winters we often experience in Statesville, an electric heat pump might provide ample warmth without breaking the bank. Environmental Impact If reducing your carbon footprint is a priority, electric heat might be the greener option. Electric systems, especially when paired with renewable energy sources like solar panels, produce no direct emissions. On the other hand, natural gas combustion does release carbon dioxide, though modern gas furnaces are designed to be highly efficient and environmentally conscious. Reliability and Comfort When it comes to reliability, gas heat often has the upper hand. Gas furnaces can operate during power outages, ensuring your family stays warm even when the grid goes down. Electric systems, while reliable, are entirely dependent on a steady power supply. That said, electric heat pumps offer both heating and cooling, making them a versatile choice for year-round comfort in the Statesville climate. They also provide more consistent, even heating compared to the cycles of a gas furnace. Making the Right Choice Ultimately, the best heating system for your home depends on your priorities. If you value lower operating costs and fast, reliable heat, a gas furnace may be the way to go. If you prefer a cleaner energy source with less maintenance and year-round versatility, an electric heat pump could be your ideal solution. At Duncan Heating & Air Conditioning, we’re here to help you weigh the pros and cons and find the perfect fit for your Statesville home. Contact us today to schedule a consultation and take the first step toward a warmer, more efficient home this winter! To learn more about some of the energy efficient heating and air conditioning products we carry and install, check out our products page !
Living in Statesville, NC, means experiencing unpredictable weather patterns, especially as the seasons change. One day, it might be warm and sunny, and the next, temperatures could drop dramatically. These sudden temperature swings can take a toll on your HVAC system and your comfort. Here are some practical tips to ensure your home is prepared for these rapid weather changes. 1. Schedule Regular HVAC Maintenance Your heating and cooling system works hardest when temperatures fluctuate drastically. Scheduling routine maintenance with Duncan Heating & Air Conditioning Inc. ensures your system is in peak condition. Our technicians will check for potential issues, clean essential components, and make necessary adjustments to keep your HVAC system running efficiently. 2. Check and Replace Air Filters Frequent temperature shifts mean your HVAC system is constantly adjusting. A dirty or clogged air filter can reduce airflow and efficiency, making it harder for your system to keep up. Check your air filters monthly and replace them as needed to maintain good indoor air quality and system performance. 3. Upgrade to a Smart Thermostat A smart thermostat can automatically adjust your home's temperature based on the weather and your schedule. This not only helps maintain a consistent indoor climate but also improves energy efficiency by reducing unnecessary heating or cooling. Check out our thermostat product page to learn more about our smart, energy efficient thermostats! 4. Seal Leaks and Insulate Your Home Sudden temperature changes can expose weaknesses in your home's insulation and air sealing. Check for drafts around doors, windows, and attic spaces. Proper insulation and weather-stripping can help stabilize indoor temperatures, reducing the strain on your HVAC system. 5. Utilize Ceiling Fans and Window Treatments Ceiling fans can help distribute warm or cool air more evenly throughout your home. During colder days, switch your ceiling fan to rotate clockwise to push warm air down. In the summer, use window blinds or curtains to block excess heat from the sun. 6. Prepare for Emergency Situations If a cold snap or heatwave hits unexpectedly, have backup heating and cooling options available. Space heaters, extra blankets, or portable fans can help maintain comfort until your HVAC system catches up. Also, make sure your system’s emergency settings are properly configured. 7. Monitor Your System for Warning Signs Pay attention to any unusual sounds, inconsistent airflow, or sudden spikes in energy bills. These can be signs that your HVAC system is struggling to keep up with temperature swings. Addressing issues early can prevent costly breakdowns. Stay Comfortable Year-Round with Duncan Heating & Air Conditioning Inc. Preparing for sudden temperature swings ensures that your home remains comfortable no matter what the weather brings. At Duncan Heating & Air Conditioning Inc., we’re here to help you maintain an efficient and reliable HVAC system. Contact us today to schedule a maintenance check or upgrade your home’s heating and cooling solutions!
