Top Mistakes to Avoid When Installing a New AC System

Installing a new air conditioning (AC) system is a significant investment in your home or business, and it’s crucial to get it right from the start. Whether you’re upgrading an outdated system, replacing a malfunctioning unit, or installing an AC system in a new property, avoiding common installation mistakes can save you money, improve comfort, and extend the life of your HVAC system.

At D-N-D Services, we have over 25 years of experience in HVAC installations, ensuring that your new AC system is set up for optimal performance. Below are the top mistakes homeowners and business owners should avoid when installing a new air conditioning system.

1. Choosing the Wrong Size Unit

One of the most common mistakes people make when installing a new AC system is choosing a unit that is either too large or too small for their space. An oversized or undersized AC system can lead to numerous problems, including inefficiency, higher energy bills, and inconsistent cooling.

1. Oversized Units: While it may seem like a larger system would provide more cooling, an oversized unit will cycle on and off frequently, leading to unnecessary wear and tear. This can cause uncomfortable temperature fluctuations, increased humidity, and higher energy consumption. 
2. Undersized Units: A unit that’s too small will struggle to cool your space effectively, running continuously and leading to poor cooling performance. This constant operation can also significantly reduce the system’s lifespan. 

The key to choosing the right size system is conducting a Manual J load calculation, which takes into account factors such as the size of the space, insulation quality, window sizes, and even the number of occupants in the building. At D-N-D Services, our NATE-certified technicians are trained to perform these calculations to ensure that your new system is perfectly sized for your needs.

2. Skipping Proper Ductwork Evaluation

Your AC system’s ductwork plays a vital role in delivering cool air throughout your home or business. Failing to evaluate or properly maintain the ductwork during installation can lead to air leaks, poor airflow, and reduced system efficiency.

1. Leaky Ducts: Even a small leak in the ducts can result in significant energy loss, making your system work harder to cool your space. It can also contribute to poor indoor air quality as dust and contaminants enter the living or working areas. 
2. Improper Duct Sizing: If your ducts are not properly sized to handle the airflow of the new system, it could result in inefficient cooling or hot spots in your home. 

Make sure to have your ducts inspected and sealed before the new system is installed. At D-N-D Services, we provide duct cleaning, sealing, and replacement services to ensure your system operates at its best from day one.

3. Ignoring Airflow and Ventilation Needs

Proper airflow is essential for maintaining consistent cooling throughout your space. Without sufficient airflow, even the best AC system won’t be able to perform efficiently.

1. Blocked Vents: During installation, make sure all vents are clear of obstructions such as furniture or curtains. Blocked vents reduce airflow, forcing the system to work harder. 
2. Inadequate Ventilation: In some cases, an HVAC system may require additional ventilation, especially in tightly sealed homes with foam insulation. Installing an Energy Recovery Ventilator (ERV) or Heat Recovery Ventilator (HRV) can improve airflow and ensure proper ventilation while keeping your home energy-efficient. 

4. Neglecting Proper Refrigerant Charging

Refrigerant is a crucial component in your air conditioning system, as it absorbs and releases heat to keep your space cool. Incorrect refrigerant levels can severely impact your system’s efficiency and lifespan.

1. Undercharged Systems: If there’s not enough refrigerant in the system, it won’t cool effectively and can cause the compressor to fail. 
2. Overcharged Systems: Too much refrigerant can lead to increased pressure in the system, causing it to malfunction or even break down. 

It’s essential that refrigerant charging is done by a professional during installation. Our experienced technicians at D-N-D Services ensure that your refrigerant is charged to the manufacturer’s specifications for maximum efficiency and optimal performance.

5. Poor Placement of the Outdoor Unit

The placement of the outdoor condenser unit is just as important as the installation of the indoor components. An improperly placed unit can affect your system’s efficiency and longevity.

1. Direct Sunlight: Placing the unit in direct sunlight can cause it to overheat, reducing its efficiency. Ideally, the unit should be placed in a shaded area where it’s protected from the sun’s heat. 
2. Obstructed Airflow: The outdoor unit needs enough clearance around it to allow for proper airflow. Ensure that the unit isn’t blocked by shrubs, fences, or debris that could restrict air movement and cause the system to overheat. 
3. Leveling the Unit: The outdoor unit should be installed on a level surface to ensure it operates efficiently. Uneven surfaces can lead to system imbalances, which can damage the compressor and other components. 

At D-N-D Services, we make sure that your outdoor unit is placed in an optimal location, with proper clearance and protection from the elements.

6. Neglecting Regular Maintenance

Many homeowners make the mistake of thinking that once their new AC system is installed, they don’t need to worry about it until it breaks down. However, regular maintenance is essential to keeping the system running smoothly and avoiding costly repairs.

1. Regular Tune-Ups: Scheduling annual maintenance, including cleaning the coils, checking refrigerant levels, and inspecting the system for wear, can extend the life of your air conditioner and improve efficiency. 
2. Filter Replacement: Clogged air filters can restrict airflow, causing the system to work harder and become less efficient. Make sure to replace or clean your filters regularly. 

At D-N-D Services, we offer comprehensive maintenance plans to ensure that your system is running at peak performance year-round, helping to prevent costly breakdowns and ensuring your comfort.

7. Cutting Corners on Quality

Lastly, one of the biggest mistakes you can make when installing a new AC system is choosing a low-quality unit or opting for the cheapest installation option. A cheap system or poor installation can lead to frequent breakdowns, inefficiency, and higher long-term costs.

1. Invest in a Reliable Brand: While the upfront cost may be higher, investing in a reputable, high-efficiency brand like Carrier, Trane, or Lennox can save you money in energy bills and repairs in the long run. 
2. Hire Professional Installers: HVAC installation requires specialized knowledge and expertise. Choosing a professional, licensed contractor like D-N-D Services ensures that your system is installed correctly and meets all local codes and manufacturer guidelines. 

Conclusion

Installing a new air conditioning system is an investment in your comfort and the value of your property. To get the most out of your new system, avoid common mistakes like choosing the wrong size, neglecting maintenance, or overlooking airflow and ductwork issues. By working with an experienced HVAC contractor like D-N-D Services, you can ensure a seamless, efficient installation that will keep your home or business cool and comfortable for years to come.

If you’re ready to replace your old AC system, call us today at D-N-D Services for expert advice, professional installation, and top-notch service in the Rockwall area.