Nothing reminds you how essential air conditioning is like the first heatwave of the season. When the temperature climbs and the air inside your home starts to feel heavy, comfort can quickly give way to labored breathing and frustration. For homeowners in Westminster and surrounding areas, a cooled house is the only livable house in muggy Maryland summers. That’s why now is the best time to get a new AC installed (or service your current AC system) before that first heatwave.
But if you’re upgrading or installing for the first time, the right central air conditioning system is one that fits your home, your routine, and the area’s unpredictable heat. Here’s what to look for to help you decide.
Types of Central Air Conditioning Systems
Choosing the right central air conditioning system starts with understanding what’s available and how each type performs in various home layouts. The two primary AC categories for residential use are split systems and packaged units, each offering unique installation and efficiency considerations.
Split Systems
These are the most common home AC systems. They separate the condenser and compressor, which are located outdoors, from the evaporator coil, which is installed inside, usually in conjunction with a furnace or air handler.
Split systems work well in homes that already have a forced-air heating system, as they can share the same ductwork. They’re ideal for properties with enough indoor and outdoor space to accommodate the two components separately. Because of their modular nature, they also allow more flexibility when it comes to capacity, energy efficiency ratings, and maintenance access.
Packaged Units
These systems combine all the key components (the compressor, condenser, and evaporator coil) into a single outdoor unit. Packaged units are often installed on a concrete slab next to the home or on the roof. This is a good solution for smaller homes or homes without basements or attics, where interior space for a split system may be limited. They’re commonly used in homes with limited crawlspace access or in older structures as well, where duct routing options are tight.
There are also high-velocity systems and ductless mini-split systems that can offer alternatives for homes with unique architectural layouts or historical features that make standard ductwork impractical. While not traditional central air in the classic sense, these options can provide whole-home cooling with a central control point, depending on how they’re configured.
The best fit for your home depends on factors such as square footage, existing ductwork, available space for installation, and long-term energy goals. Our in-home assessment can help you determine which system type will deliver the best comfort and efficiency for your specific needs.
Sizing and Capacity Considerations
Picking the right size central air conditioner is one of the most important decisions in the process. An undersized system will struggle to keep up on hot days, while an oversized unit may cool the space too quickly without properly removing humidity. Either scenario can lead to higher energy bills and discomfort.
Cooling capacity is measured in British Thermal Units (BTUs) per hour, and determining the correct capacity for your home involves more than just square footage. A professional load calculation accounts for ceiling height, insulation levels, number and placement of windows, orientation to the sun, local climate, and even the number of occupants in the home.
As a general rule of thumb, most homes require about 20 BTUs per square foot of living space. For example, a 2,000-square-foot home would typically need a system with approximately 40,000 BTUs of cooling capacity. However, this estimate can vary significantly based on your home’s layout and energy efficiency.
In other words, a well-insulated 2,000-square-foot home in Westminster, MD, with moderate sun exposure will need a different system than a home of the same size with poor insulation and large south-facing windows. HVAC professionals use Manual J calculations to assess these details and recommend the appropriate system size.
Choosing the right capacity is also essential for efficiency, indoor air quality, and long-term performance. A unit that’s properly matched to your home’s unique thermal characteristics will deliver consistent comfort and help extend the lifespan of your system.
Energy Efficiency and SEER Ratings
Energy efficiency is pretty much at the top of the list of priorities with an AC system. The Seasonal Energy Efficiency Ratio (SEER) is the industry standard for measuring an AC system’s efficiency. Higher SEER ratings for AC mean units use less energy to produce the same cooling output, directly reducing your monthly utility costs and carbon footprint.
Modern systems typically range from SEER 13 to SEER 25 or higher. While units with higher SEER ratings offer long-term savings through lower operating costs, they may come with a higher upfront price. Homeowners typically consider factors like the regional climate, how often the system will run, and how long they plan to stay in the home when making this decision. In many cases, investing in a mid- to high-efficiency model strikes the right balance between cost and performance.
Maintenance, Warranties & Other Considerations
Picking the right central AC system is only part of the equation; keeping it running efficiently over time is just as important.
Regular maintenance plays a critical role in energy efficiency, long-term performance, and indoor air quality. A well-maintained system is less likely to break down during peak summer months and can help reduce your energy bills.
When comparing systems, take a close look at the manufacturer’s warranty terms. Coverage for parts and labor, compressor protection, and service call policies can vary significantly. A reliable warranty offers peace of mind and often reflects the manufacturer’s confidence in their equipment.
It’s also wise to consider the service provider’s post-installation support. At Apple Plumbing, Heating & Air, we offer a free estimate before any installation work begins so you know exactly what to expect. Every new central AC system we install comes with a one-year free maintenance package, designed to keep your unit operating at its best during the first critical season. Our customers also benefit from a 2-year parts and labor warranty. For added flexibility, financing is available for qualified individuals who need help paying for a new HVAC system.
Finally, think about future accessibility for repairs and cleanings, the installer’s reputation, and the responsiveness of their customer support. Choosing a system backed by skilled technicians and proactive service can make all the difference in how comfortable and stress-free your summer really is.
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