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How To Choose the Right Split-System Air Conditioner

Written by Craig Aspinall | Jun 22, 2025 4:30:00 AM

Split-system air conditioners are a great option for cooling your home, especially if you have limited space or no ductwork. This AC option cools the room by drawing hot air from outside and pushing cool air inside. Unlike a traditional AC unit, a split system operates without ductwork, featuring an indoor and outdoor unit connected by refrigerant tubing, making the installation less invasive while offering a sleeker, more energy-efficient solution. This expert guide explains how to select the ideal split-system air conditioner.

Set a Budget

Before you start shopping for a split system, think about how much money you can afford to spend on it. Consider the total cost, including the unit price and installation expenses, to understand the total investment.

Keep in mind that while a lower upfront cost may seem appealing, poorly made systems often result in higher electricity bills and more frequent repairs. That said, you may not need the most expensive option either. Instead, look for the most economical split unit. The price will vary depending on the quality of the parts used and the system’s functions, so it’s best to create a list of options and then compare them side-by-side.

Evaluate Size

Choosing the right size split-system air conditioner is crucial for achieving effective cooling and optimal energy efficiency. Here’s what you need to consider.

System Size

Experts measure an air conditioner’s capacity in British Thermal Units (BTUs), which indicate the amount of heat the unit can extract or supply per hour. Higher BTU ratings mean a greater cooling capacity.

Consult with a professional if you’re unsure about the size of the split system you need to purchase. If a system is too small for your manufactured home, it’ll struggle to cool rooms. However, if the system is too large, it may cycle on and off because it cools the space too quickly and fails to remove humidity from the air properly.

Room Size

Room dimensions, ceiling height, and insulation quality all play a significant role in determining the size of the air conditioner required. For instance, a 200-square-foot room may only require a unit with 6,000 BTUs, while a larger 500-square-foot living area would need a system rated around 12,000 BTUs. Other additional factors, such as sunlight exposure and the number of occupants, also influence the performance needs of your air conditioning unit.

Review Energy Efficiency

Efficient units consume less electricity, which lowers your energy costs and reduces your environmental impact. To identify energy-efficient models, pay attention to the Seasonal Energy Efficiency Ratio (SEER) rating. Higher SEER ratings indicate better energy performance, so use this as a benchmark when comparing options.

Many modern units also feature an Energy Star certification, which means the appliance meets the strict requirements set by regulatory authorities. Systems with an Energy Star rating use energy more efficiently, helping you save on energy bills while reducing your environmental footprint.

Consider Noise Levels

The last thing you want is an air conditioner that’s loud every time it turns on. This can be annoying and distracting, especially if the system is in a bedroom or home office. While you should expect the system to let out a low hum when it runs, you can minimize disturbances by choosing a model with lower decibel ratings. 

Most manufacturers should list the noise levels in decibels (dB) within the product description. For the quietest experience, look for models operating below 50 dB, which is comparable to a soft conversation.

Read Past Reviews

Another tip for choosing the right split-system air conditioner is to read through what other customers have to say. Fellow buyers left these reviews to tell future customers about the durability, reliability, and real-world performance of the split system. Better yet, reviews are often unfiltered, giving you genuine insight into a product before you make your final decision.

When evaluating reviews, prioritize those that provide detailed feedback rather than overly simplistic or emotional ratings. This can help you make an informed decision based on the unit’s quality.

Consider Brand Reputation

Brand reputation can also play a role in choosing the right split-system air conditioner. Some brands have decades of experience in manufacturing, selling, and installing units, so they’ll have more expertise than a company that’s new to the industry. Research the brand’s history and read customer reviews that specifically mention the brand to gain a better understanding of its overall reputation.

Compare Warranties

Warranties offer peace of mind by covering key components, including compressors, circuit boards, and refrigerant systems. When comparing options, look for warranties that last at least five years, as they indicate the manufacturer’s confidence in the product’s performance and durability. Be aware of warranty details that exclude essential parts or heavily limit coverage, as these could signal potential reliability issues.

Pro Tip

Most warranties include specific actions that may void your coverage. For example, if the split-system air conditioner breaks down and you attempt to fix it yourself, the warranty may become invalid, regardless of how much time remains on it. Always use licensed professionals for repairs to protect your warranty coverage.

Check the Features

Split-system air conditioners now come equipped with modern features that enhance functionality, convenience, and energy efficiency. Understanding these features can significantly improve your overall experience with the unit.

Heating and Cooling Options

Selecting a system with heating and cooling capabilities is an excellent option for year-round use. Reverse-cycle air conditioners eliminate the need for separate heating systems, saving money and simplifying the maintenance of multiple appliances. These versatile systems seamlessly transition between functions, offering a practical and efficient solution for people living in areas with varying seasonal temperatures.

Programmable Timers

Programmable timers allow you to set your air conditioner to turn on or off at specific times, helping you save energy and maintain a comfortable space effortlessly. This feature is particularly useful if you want your home pre-cooled before you arrive or to automatically shut it off while you are sleeping or away from home.

Mobile Controls

Many modern split-system air conditioners come with mobile control options through apps on your phone. These allow you to monitor and adjust settings remotely, whether you’re at work or on the go.

Evaluate Installers

Proper installation affects everything from performance to energy consumption, so it’s essential to hire the best professional for the job. Installing a unit incorrectly can void your warranty, highlighting the importance of working with a licensed professional.

When selecting an installer, consider their reputation, certifications, and customer reviews. Experienced installers often offer additional services, such as annual maintenance plans and post-installation support, helping you to maintain your system.

Contact Us

Selecting the right split-system air conditioner is a meticulous process that balances budget, performance, and long-term efficiency. By carefully evaluating these factors, you can make an informed decision that delivers comfort and savings for years to come.

Capitol Supply & Service sells mobile home split-system AC units that are perfect for manufactured homes. Once you purchase a system from us, we can also visit your home to install and maintain it over the years. Making a thoughtful choice in your split-system air conditioner means investing in years of comfort, energy efficiency, and peace of mind for your home.