Why Your Heat Pump Struggles on Freezing North Carolina Nights (and What to Do About It)

As winter settles in around Statesville and the temperatures drop, many homeowners naturally think about furnace tune-ups, filters, and thermostat settings. What is often less top of mind: indoor humidity — yet it plays a key role in comfort, health and HVAC performance during the colder months. Why humidity matters this time of year When outdoor air gets colder, it holds less moisture. As we bring that air inside and heat it, its relative humidity drops dramatically – often to levels that feel dry and uncomfortable. This has a handful of knock-on effects: Dry skin, scratchy throats and increased static indoors. Wood floors, furniture and window/door frames may shrink or crack from the dry air. Your heating system may run more often to compensate for the “dry-cold” feeling even when thermostat settings haven’t changed. Paradoxically, colder air with higher moisture content can feel warmer than dry air at the same temperature. How low humidity affects your HVAC system At Duncan Heating & Air Conditioning, we see how improper indoor moisture levels can challenge the system’s efficiency: When air is very dry, you might crank up the thermostat setting to feel warm — but your furnace is doing more work and your energy bills go up. Ductwork and vents may accumulate dust more quickly in dry air—clogging filters, reducing airflow, and stressing the system. If your system includes a heat pump or hybrid system, optimum performance often depends on a correct balance between heating load and indoor humidity. What “ideal” indoor humidity looks like For winter months in our region, a good target range is around 35 %–45 % relative humidity (RH). Too high (over ~50 %) worsens condensation risk on windows and in crawlspaces; too low (under ~30 %) leads to the dry-air issues above. Here are some practical steps we recommend to our neighbors at home and at Duncan Heating & Air Conditioning: Use a hygrometer – A small inexpensive device will tell you your current indoor humidity. If you’re below ~30% RH, take action. Introduce moisture – when needed Use a portable humidifier in high-use areas (bedrooms, living room). Place water-filled trays or plants in sunny spots to passively add humidity. Be mindful: Don’t over-humidify. If windows fog up and drip, humidity is too high. Seal the envelope of your home Close gaps in weather-stripping around doors and windows so the heater isn’t battling cold drafts and dry outside air. Ensure your attic and crawl space are properly insulated so the dry outside air isn’t pulling warmth (and moisture) out of the living area. Maintain your HVAC regularly Change filters monthly so airflow isn’t restricted — dry air moves fast but clogged systems still suffer. Have us inspect ducts and vents for dust-build up (which dry air accents). Ask us about integration of a whole-home humidifier system — if you’re finding portable humidifiers annoying or ineffective, this may be worth the investment. Adjust thermostat strategy You may find that you feel comfortable at a slightly lower thermostat setting when indoor humidity is balanced — meaning you’re warmer and using less energy. Consider using lower “away” settings during daytime, and raise it before you return, but keep humidity control active. Why choosing a pro makes the difference At Duncan Heating & Air Conditioning, we’ve been serving Statesville and surrounding areas since 1931 and know how local weather patterns impact homes. With experience, we can help you determine whether your heating system, ductwork, insulation or humidification setup needs an upgrade — not just patchwork fixes. A properly balanced home (heating system + humidity + insulation) means fewer cold spots, lower energy bills, less static and better comfort overall. More importantly: it means you’re not simply warming dry air — you’re creating a warm, healthy home environment. Ready to optimize your winter comfort? If you’ve noticed dry air symptoms, uneven warmth, or higher heating bills this season, let our team take a look. We offer: Humidity mapping and diagnostics Whole-home humidifier installation and integration HVAC tune-up with heating-season focus Duct and vent inspection Energy-efficiency consulting for insulation and sealing upgrades Call us at 704-872-2431 or schedule service through our website. Let’s make sure your home in Statesville stays warm and comfortable — the right way — this winter.

As the crisp mornings begin and leaves start to fall in the Statesville area, it’s the perfect time to shift your home-comfort strategy. The transition from summer cooling to fall heating presents unique opportunities (and a few hidden risks) for your HVAC system. At Duncan Heating & Air Conditioning, we want to help you make this seasonal shift smoothly, comfortably and cost-effectively. 1. Take advantage of moderate weather for airflow cleanup One of the best times to act is right now — when you neither need full-on cooling nor full-on heating. That means your system can be inspected, cleaned, and prepared before it’s under heavy load. For example: Remove leaves, pine straw, and other debris from around the outdoor unit so airflow isn’t restricted. Clear return vents, inspect filter access, and check that nothing is obstructed inside your home. This kind of proactive care helps your system run more efficiently and extends its service life. 2. Switch the thermostat but stay ready for temperature swings In fall, you’ll often toggle between the “A/C” and “heat” mode — sometimes in the same day. This means: If you have a heat pump, check that it switches correctly between cooling and heating modes. If you use a furnace, make sure the thermostat is set correctly and the system is ready to kick in when the chill arrives. By doing this early, you avoid that moment when you turn the heat on for the first time and it fails or performs poorly. 3. Replace or upgrade your air filters & check your indoor air quality Summer tends to fill HVAC filters with dust, pollen, and other pollutants. As the weather cools, you may see an increase in indoor allergens (leaves, mold from damp fall air, etc.). So: Change your air filter now — it’s a small cost for big benefits. Consider a higher-quality filter or an indoor air quality check to handle allergens and the transitional season’s humidity changes. Clean filters and good airflow reduce stress on your system and help maintain comfortable air. 4. Inspect your ductwork & vents for leaks and drafts During the summer your HVAC system’s load is high, so it’s easier to ignore inefficiencies. In fall, when you start using heating, weaknesses show up more clearly. What to do: Walk around your home and check for cold spots, drafty rooms, or vents that are blocked. Inspect exposed ductwork (especially in attics, crawlspaces, basements) for visible gaps or disconnected seams. Seal or insulate where needed so when heating starts, you’re not paying to warm up lost air. This improves comfort and lowers monthly energy costs. 5. Consider booking a fall tune-up to get ahead of winter You likely already know about spring checks for your A/C, but fewer homeowners remember a pre-heating season tune-up. Here's why it makes sense: A technician can spot wear from summer, check heating components, test efficiency, and make adjustments before you rely on the system on cold nights. You’ll reduce the chance of emergency breakdowns when temperatures drop and service queues are longer. It’s an investment in peace of mind and better performance for the season ahead. Why now matters Waiting until your first cold morning to act is risky. HVAC issues often start small but become costly fast — especially when demand ramps up. By prepping in this intermediate season, you: Extend equipment life span Avoid higher energy bills Maintain more even comfort levels Minimizing repair interruptions when you least want them Let Duncan Heating & Air Conditioning help If you’re in the Statesville, NC region and want to get ahead of the fall/hunting-season weather shifts, we’re here for you. Whether it’s clearing your outdoor unit, inspecting vents and ductwork, replacing filters, or scheduling your fall tune-up — we’ve got you covered. Contact us today to ensure your home stays comfortable, efficient, and ready for whatever the coming months bring.

As we head into fall in North Carolina, the days grow shorter and the nights chillier. It’s the perfect time to start thinking about how your HVAC system can work smarter—not harder—to keep you comfortable without sending your energy bills through the roof. At Duncan Heating & Air Conditioning, we’re always looking for ways to help our customers get more from their systems. Here are practical tips you can use right now to reduce your heating (and cooling) costs this season. 1. Leverage Natural Heat: Use the Sun Strategically Take advantage of sunny days: open curtains or blinds on south- and west-facing windows during daylight hours. This passive solar gain can help warm your home without turning on the heat. Then, as evening arrives, close them to retain the warmth. 2. Adjust Your Thermostat a Few Degrees Every degree matters. Lowering your thermostat by just 1–2 °F during cooler days (or raising it slightly when heating is in use) can yield noticeable energy savings. Use setback settings for when you’re asleep or away from home. A programmable or smart thermostat makes this easy. 3. Seal Drafts & Insulate Strategically Even a well-functioning HVAC system struggles if your home leaks air. Walk around your doors, windows, and baseboards looking for drafts. Use weatherstripping or caulk to seal gaps. Also, check attic and crawlspace insulation—adding a bit more insulation where needed is a relatively low-cost upgrade with long-term payoff. 4. Zone Wisely & Close Rooms You Don’t Use If your home has multiple zones or dampers, reduce conditioning in unused areas. Shut vents in guest rooms, basements, or storage spaces to focus heated air where it matters most. Just be careful not to close too many vents at once (which can affect system pressure). 5. Clean & Schedule Maintenance Now, Before Heating Demand Ramps Up Replace your air filters (if you haven’t recently). Clear debris from around your outdoor unit (if you have a heat pump) so airflow isn’t blocked. Make sure vents, registers, and returns are unobstructed by furniture or rugs. Schedule a professional tune-up: checking electrical, gas connections, combustion (if applicable), duct leaks, and system calibration can reveal small issues before they turn into costly repairs. 6. Use Ceiling Fans & Air Circulation to Your Advantage Many people think ceiling fans only help in summer—but they’re useful in fall too. Switch your fan’s direction to clockwise (low speed) to gently push warm air downward. This helps mix the air and can reduce the need to bump up the thermostat. 7. Monitor HVAC Performance & Watch for Inefficiencies Keep an eye on your energy bills, listen for odd noises, notice uneven heating, or detect higher humidity. If something seems off, call a technician to audit your system. Sometimes a minor adjustment or calibration can restore efficiency. Fall is a transition season—not quite cold, but cooler enough that the habits you set now can make a big difference in comfort and cost. With small changes like smarter thermostat use, sealing drafts, and proactive maintenance, your HVAC system can deliver the comfort you need without wasting energy. If you'd like professional help tuning your system or finding tailored energy-saving upgrades, Duncan Heating & Air Conditioning is here to help. Contact us today to schedule a fall performance check or ask about economical ways to make your heating system more efficient.

September may signal the start of fall, but in Statesville and across North Carolina, we all know the summer heat doesn’t just disappear overnight. Many homeowners still find themselves running the air conditioner well into September, which can keep energy bills higher than expected. The good news? A few simple adjustments can help you stay comfortable while keeping costs under control. At Duncan Heating & Air Conditioning, we’ve put together some practical tips to help lower your energy bills as summer lingers on. 1. Adjust Your Thermostat Settings A small change goes a long way. Setting your thermostat just a few degrees higher can make a noticeable difference in your energy use. For example, aiming for 76–78°F when you’re home and 80–82°F when you’re away helps reduce the strain on your system without sacrificing comfort. 2. Use Ceiling Fans to Your Advantage Ceiling fans don’t cool the air, but they circulate it so you feel cooler. This means you can raise your thermostat a degree or two without noticing much difference. Just remember to turn fans off when you leave a room—they only work when you’re there. 3. Keep Up with Filter Changes A dirty air filter makes your HVAC system work harder than it needs to. Replace filters every 30–60 days during heavy use. This not only saves energy but also improves indoor air quality for your family. 4. Seal Air Leaks and Improve Insulation Warm air sneaking in through cracks around windows, doors, or ductwork forces your AC to run longer. A quick weekend project—like adding weatherstripping or sealing duct joints—can make your home more efficient and lower energy bills. 5. Schedule an HVAC Tune-Up Preventative maintenance is one of the smartest ways to save money. A professional tune-up ensures your system is running at peak efficiency, identifies small issues before they become big repairs, and helps extend the life of your unit. 6. Take Advantage of Cooler Nights When evening temperatures drop, consider turning off your AC and opening the windows. Using natural ventilation, even for a few hours, can reduce your cooling costs significantly. Stay Comfortable, Spend Less As summer stretches into September, keeping your energy bills in check doesn’t have to mean giving up comfort. With these small steps—and the help of a trusted HVAC partner—you can stay cool and save money. At Duncan Heating & Air Conditioning, we’re here to help homeowners in Statesville and the surrounding area get the most out of their HVAC systems. Whether you need maintenance, repairs, or advice on improving efficiency, our team is just a phone call away. 👉 Contact us today to schedule your late-summer HVAC service and start saving on energy costs.

Summer in Statesville can bring soaring temperatures—and with them, rising energy bills and overworked air conditioners. At Duncan Heating & Air Conditioning, we believe in smart, energy-efficient solutions that keep your home comfortable without putting unnecessary strain on your HVAC system. Whether you're trying to lower your electric bill or extend the life of your unit, here are some practical tips to help you keep your cool without overworking your AC. 1. Close Blinds and Curtains During the Day Sunlight streaming through your windows may look nice, but it also heats up your home—fast. Keep blinds and curtains closed during the hottest parts of the day, especially on south- and west-facing windows, to block out the sun’s heat and reduce your AC’s workload. 2. Use Ceiling Fans Wisely Ceiling fans don’t cool the air, but they help you feel cooler by moving air across your skin. By running your ceiling fans counterclockwise in the summer, you can raise your thermostat a few degrees without sacrificing comfort. Just remember to turn them off when you leave the room to save energy. 3. Seal Leaks and Insulate Cool air escaping through poorly sealed doors, windows, or attic spaces makes your AC work harder. Sealing cracks and gaps, adding weatherstripping, and improving insulation are easy upgrades that make a big difference in efficiency. 4. Avoid Using Heat-Generating Appliances Midday Try to limit the use of ovens, stoves, dryers, and even dishwashers during the heat of the day. These appliances add unwanted heat to your home and force your AC to work overtime. Consider grilling outside or using smaller appliances like toaster ovens or microwaves in the evening hours. 5. Set a Smart Thermostat Schedule Smart thermostats allow you to control your home’s temperature more efficiently. Setting your thermostat a few degrees higher when you’re away from home can reduce strain on your system and lower your energy usage—without compromising comfort. 6. Keep Your Air Filters Clean A dirty air filter restricts airflow and makes your AC system less efficient. Checking your filters monthly and changing them as needed—usually every 1–3 months—can improve indoor air quality and help your AC run more smoothly. 7. Schedule Regular AC Maintenance Preventative maintenance is key to a long-lasting, efficient HVAC system. At Duncan Heating & Air Conditioning, we recommend scheduling a professional tune-up at least once a year to clean components, check refrigerant levels, and catch small issues before they turn into costly breakdowns. Stay Cool the Smart Way with Duncan Heating & Air Conditioning Keeping your Statesville home cool shouldn’t come at the cost of high energy bills or a worn-out AC. These small changes can go a long way toward making your home more comfortable and efficient. Need help improving your home’s cooling performance? Contact Duncan Heating & Air Conditioning today to schedule a tune-up , explore energy-saving upgrades, or get advice tailored to your home and budget.

At Duncan Heating & Air Conditioning, we know how frustrating it is when your AC system starts blowing warm air—especially during the peak of a North Carolina summer. If you’ve cranked down the thermostat and your home still feels more like a sauna than a sanctuary, there could be several reasons behind the problem. Here’s a look at some of the most common issues that could be causing your air conditioner to blow warm air, and what you can do about it. 1. Thermostat Issues Let’s start with the basics. Sometimes the issue is as simple as an incorrect thermostat setting. Double-check the mode. Make sure your thermostat is set to “cool” and not “heat” or “fan.” Check the set temperature. Someone in the house may have bumped it up higher than you realized. Dead batteries or faulty sensors in your thermostat can also cause communication issues with your AC unit. If everything looks correct but the problem persists, it may be time for a professional inspection. 2. Dirty or Clogged Air Filter A clogged air filter restricts airflow and can cause your system to overheat and blow warm air. Check your filter monthly and replace it at least every 1–3 months during the cooling season. Dirty filters can lead to poor airflow, frozen evaporator coils, and reduced efficiency overall. This is one of the easiest (and most affordable) problems to prevent. 3. Low Refrigerant Levels Refrigerant is the substance your AC system uses to absorb heat from inside your home. If the system is low on refrigerant (usually due to a leak), it won’t be able to cool effectively. Warning signs include: warm air, ice on the refrigerant lines, and hissing or bubbling noises. Solution: A licensed technician from Duncan Heating & Air Conditioning can locate and repair the leak, then recharge the refrigerant to proper levels. Refrigerant issues are not DIY-friendly, so give us a call if you suspect this is the problem. 4. Dirty Outdoor Unit (Condenser) Your AC’s outdoor unit releases the heat removed from inside your home. If it’s dirty or blocked, the system can’t release heat efficiently, and warm air may circulate back inside. Keep the area around your unit clear of leaves, grass clippings, and debris. If the coils are dirty, a professional cleaning may be needed. Regular maintenance helps keep this part of your system working properly. 5. Electrical Problems or Blown Fuses Electrical issues like a tripped circuit breaker or a blown fuse can shut down key components of your AC system, including the compressor. If the fan is running but the air isn’t cold , your outside unit might not be powered on. Don’t repeatedly reset breakers—call a pro to check things out safely. 6. Frozen Evaporator Coils When airflow is restricted—often due to a dirty filter or blocked vents—the evaporator coils can freeze over. Once that happens, your AC can’t properly cool the air. You may notice ice buildup on the coils or refrigerant lines . Turn the system off and allow it to thaw before restarting, then call a technician to prevent it from happening again. Need Help Fast? Call Duncan Heating & Air Conditioning If your AC is blowing warm air, it’s best to act quickly—what starts as a small issue can turn into a major repair. At Duncan Heating & Air Conditioning, we proudly serve Statesville, NC and surrounding communities with prompt, honest, and affordable HVAC service. Whether you need a quick repair, a full system tune-up, or a second opinion, we’re here to keep your home cool and comfortable all summer long. 📞 Call us today at 704-872-2431 🌐 Or schedule service online today!

When the summer heat hits Statesville, NC, staying cool and comfortable becomes a top priority for homeowners. At Duncan Heating & Air Conditioning, we’re committed to helping you beat the heat with reliable, energy-efficient HVAC solutions tailored to your home’s specific needs. Customized Cooling Solutions for Every Home No two homes are the same—and neither are their cooling needs. That’s why we take a personalized approach to air conditioning service. Whether you need a brand-new system installation, an upgrade to a more energy-efficient unit, or fine-tuning on your existing AC, our experienced technicians make sure your system is set up to keep your entire home cool, even on the hottest Iredell County afternoons. Fast, Reliable AC Repairs When your air conditioner suddenly stops working, you don’t have time to wait around. Our local team is known for prompt, professional AC repair services. We diagnose issues quickly and get your system back up and running, so you’re not left sweating through the summer. We stock a wide range of parts and tools to handle most repairs on the spot. Preventative Maintenance That Pays Off Preventative maintenance is one of the best ways to extend the life of your AC system and avoid expensive breakdowns. Our seasonal tune-ups include thorough inspections, cleaning, and performance checks. This helps your system run more efficiently and keeps your energy bills in check—all while improving indoor air quality and comfort. Energy Efficiency Matters We understand the importance of keeping your home comfortable and cost-effective. That’s why we offer energy-efficient HVAC options, including programmable thermostats and high-SEER-rated air conditioners. These upgrades can significantly reduce your cooling costs and carbon footprint while maintaining optimal indoor comfort. Local Service You Can Count On As a trusted HVAC contractor based right here in Statesville, Duncan Heating & Air Conditioning is proud to serve our neighbors with honest, reliable service. We’re committed to your comfort—and to building long-term relationships with homeowners across our community. Stay Cool with Duncan Heating & Air Conditioning Don’t let summer heat sneak up on you. Whether you’re preparing for the season with a tune-up or facing an unexpected AC issue, Duncan Heating & Air Conditioning is here to help.  📞 Call us today at 704-872-2431 or schedule service online to keep your home cool and comfortable all summer long.

As spring settles in and temperatures start to rise, it’s the perfect time to make sure your air conditioner is ready for the warmer months ahead. But what happens when your AC isn’t performing the way it should? Deciding whether to repair or replace your air conditioner can be a tough call, and at Duncan Heating & Air Conditioning, we’re here to help homeowners in Statesville, NC make the best decision for their comfort and budget. Signs Your Air Conditioner Might Need a Repair Not every issue means you need a brand-new system. In many cases, a simple repair can restore your AC’s performance and extend its lifespan. Here are a few signs that a repair might be the best option: Inconsistent Cooling: If some rooms feel warmer than others, your system may need a tune-up or ductwork inspection. Strange Noises: Grinding, rattling, or buzzing sounds often point to loose components or worn-out parts that can usually be repaired. Higher Energy Bills: A sudden spike in your utility bills could indicate a problem with efficiency that may be resolved with maintenance or minor repairs. Frequent Cycling: If your system turns on and off frequently, it could be due to a faulty thermostat or clogged filter, both of which are typically easy fixes. Regular maintenance can address many of these issues early, saving you from more costly repairs down the line. When It’s Time to Consider Replacing Your Air Conditioner While repairs are often the first choice, there comes a time when replacing your air conditioner makes more financial sense. Consider a replacement if you’re experiencing any of the following: Age of the System: Most air conditioners have a lifespan of 10–15 years. If your system is nearing or past this range, replacement might be more cost-effective than ongoing repairs. Frequent Repairs: Are you calling for repairs more than once a season? The costs can add up quickly, making a new system a smarter investment. Major Component Failures: Issues like a failed compressor or refrigerant leaks can be expensive to fix and may indicate your system is on its last leg. Decreased Energy Efficiency: Older systems tend to lose efficiency over time, leading to higher energy bills. Upgrading to a modern, energy-efficient unit can save you money in the long run. Comfort Issues: If your home never seems to reach the desired temperature or humidity levels, even after repairs, it could be time for an upgrade. Newer air conditioning systems are designed with advanced technology to improve comfort, reduce energy costs, and provide more reliable cooling for years to come. The Benefits of Professional Guidance Deciding between repairing and replacing your air conditioner can feel overwhelming, but you don’t have to make that decision alone. At Duncan Heating & Air Conditioning, our experienced technicians will thoroughly evaluate your system, discuss your options, and help you choose the best solution for your home and budget. We proudly serve homeowners in Statesville, NC with honest recommendations, transparent pricing, and top-quality service to keep you comfortable throughout the spring and beyond. Schedule Your Spring AC Inspection Today! Don’t wait until the summer heat hits—contact Duncan Heating & Air Conditioning today to schedule your spring AC inspection. Whether you need a quick repair or are ready to explore replacement options, we’re here to ensure your home stays cool and comfortable all season long. Stay cool this spring with Duncan Heating & Air Conditioning—your trusted HVAC experts in Statesville, NC! Check out our air conditioning service page to learn more about how we can keep your Statesville, NC home comfortable all summer long.

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!