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How to Choose the Right 3.5-Ton AC Unit

3.5 Ton Trane A/C

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Looking to cool a large space? A 3.5 Ton AC unit might be the solution for you. These large units are great for medium to large homes and can provide cool, consistent air in the warm months.

Let’s take a look at what a 3.5-ton unit is, when it’s necessary, and what maintenance and installation look like. Additionally, we’ll provide tips for maximizing energy efficiency with your AC system regardless of size. Whether you are considering purchasing a 3.5 Ton AC unit or already own one, this guide has got you covered.

Understanding 3.5 Ton AC Units

When it comes to air conditioning, choosing the right size is crucial to comfort and efficiency. One of the units that are often misunderstood is the 3.5-ton AC unit. But what does it mean, and why should you care about it? Let’s break it down.

What is a 3.5 Ton AC Unit?

A 3.5-ton AC unit refers to the cooling capacity of the air conditioner systems. In simple terms, it’s the amount of heat the air conditioner can remove from a house in an hour. It’s called a ‘ton’ because it’s based on the amount of heat needed to melt one ton of ice in 24 hours.

How is Tonnage Calculated, and Why Does it Matter?

Tonnage isn’t about the physical weight of the air conditioner; rather, it is a measure of the cooling capacity. It’s calculated by the number of BTUs (British Thermal Units) the unit can remove per hour. For instance, a 1-ton AC can remove 12,000 BTUs, while a 3.5-ton AC unit can remove 42,000 BTUs.

Understanding the right tonnage for your space is critical because it affects the efficiency and effectiveness of your cooling system. If the tonnage is too high, the unit will constantly cycle off and on, using more energy and increasing your monthly costs. On the other hand, a lower-tonnage unit will run constantly, not providing enough cooling and straining the system.

When is a 3.5-Ton AC Unit Necessary?

A 3.5-ton AC unit is often suitable for medium-to-large homes, generally those measuring between 2,500 – 3,000 square feet. Other factors, including ceiling height, insulation, window size, and local climate, should also be considered. A professional HVAC expert or AC wholesaler can guide you in determining the appropriate size unit for your needs.

Installation and Maintenance of 3.5 Ton AC Units

Guidelines for Professional Installation

Proper installation of a 3.5-ton AC unit is essential for optimal performance and longevity. An experienced technician can manage critical steps, including positioning the outdoor unit, connecting the air handler and condenser, charging the system with refrigerant, and ensuring the coil width is properly matched to the unit.

Essential Routine Maintenance Tasks for 3.5 Ton AC Units

Maintaining 3.5-ton AC units is essential to keep them running efficiently and smoothly. Basic tasks like cleaning or replacing air filters regularly, cleaning the outdoor unit, inspecting all the system components, and keeping the area around the outdoor unit clear are necessary.

The Importance of Yearly Servicing

While regular cleaning and inspection can be done by homeowners, professional servicing of your air conditioner + coil system should be done annually. Technicians can inspect the system for potential issues, clean internal components, check refrigerant levels, and make sure all parts are working correctly. This ensures your 3.5-ton AC is at peak performance for the hot months ahead, reducing the likelihood of a breakdown and the need for costly repairs.

The Efficiency and Cost Savings of 3.5 Ton AC Units

The efficiency of an AC unit is often measured by its Seasonal Energy Efficiency Ratio (SEER). As the standards and technology of air conditioner systems advance, more efficient models, such as 3.5 Ton AC units, are being developed.

The 3.5-ton air conditioner units are powered by advanced technology, providing efficient cooling solutions. They use less power to operate, which translates to lower energy bills. The higher the SEER of your ton AC unit, the lower your monthly costs will be.

Energy Star Certified 3.5 Ton AC Units

Energy Star is a renowned program that helps individuals save money and protect the climate through superior energy efficiency. The Energy Star certified 3.5 Ton AC units are recognized for delivering quality performance while saving energy.

These air conditioner units carry an energy star sign, meaning they consume 8% less energy than non-certified products. AC wholesalers shoulder the responsibility of informing clients about the superiority of these units.

Cost Savings and Environmental Benefits of Efficient Units

Opting for a 3.5-ton air conditioner installation can reduce your monthly costs and contribute to environmental preservation. Advanced air conditioner + coil system models help decrease the unit’s coil width, resulting in less energy consumption and fewer greenhouse emissions.

Energy-efficient air conditioning units also put less strain on the electricity grid, contributing to a more sustainable energy future. Opting for greener AC options can tremendously help benefit the environment.

Tips for Optimizing Your AC Unit’s Energy Usage

If you’re unsure if you need a 3.5-ton AC unit or plan to invest in one, following best practices for energy efficiency is essential. Here are some tips to keep in mind to get the most out of your air conditioner:

Choose the Right Size AC Unit

When getting a new air conditioner, it’s essential to pick the appropriately sized unit for your home. A unit that’s too small won’t be able to cool your home effectively. A unit that’s too large will cool your home quickly but will turn on and off frequently, reducing efficiency. While 3.5-ton units can be great for large spaces, you don’t want to invest in this equipment if it’s not the correct size.

When you work with professional HVAC installers, they can take measurements of each room you want to cool and calculate the total square footage. Then, they can use an AC sizing calculator or guide to determine the appropriate BTU rating for a 3.5-ton unit based on your square footage. If your unit is too big, it will use more energy over time trying to cool the space rapidly.

Have Your AC Serviced Regularly

To keep your 3.5-ton AC operating at peak efficiency, have it serviced yearly before the cooling season starts. The technician will check refrigerant levels, clean the condenser coils, ensure proper airflow, and examine the evaporator. Minor repairs can be made to prevent more significant issues down the road.

The technician can also check that your unit is correctly charged with refrigerant. Too little refrigerant will make the AC work harder to provide cooling. Too much refrigerant will increase energy usage.

Install a Programmable Thermostat

A programmable thermostat allows you to set temperature schedules throughout the day and week to match when you need cooling. You can set the thermostat to a higher temperature while you are away at work or lower it before you come home.

Programmable thermostats have a payback period of less than a year through energy savings. Units with smart technology can learn your schedule and adapt.

Use a Ceiling Fan

Ceiling fans optimized for AC provide cooling with just a fraction of the energy. Use your ceiling fan at medium speed to create a cooling breeze. The moving air makes it possible to set your thermostat several degrees higher while maintaining comfort.

Turn off your ceiling fan when you leave a room. Fans cool people directly and do not affect room temperature. Running them in an empty room wastes energy.

Change Air Filters Monthly

Dirty air filters make your AC work much harder to push air through the restricted filter. This uses more energy over time and can cause damage. As a reminder, check your filter each month when you receive your electricity bill. Replace filters as needed or clean reusable ones.

Buy filters in bulk for the whole season. Some utility companies provide discounted filters to reduce energy demands. Check to see if any rebates or discounts are offered in your area.

Install Window Treatments

Window treatments like blinds, curtains, and tinted window film reduce heat gain from sunlight. With less heat entering the home, your AC doesn’t have to work as hard to maintain the temperature.

Close all windows during the hottest part of the day. South and west-facing windows receive the most direct sunlight. Maximize insulation from sunlight to minimize energy usage.

Seal Air Leaks

Cracks and gaps around windows, doors, ducts, and other openings let cooled air escape and hot air enter. Use caulk and weatherstripping to seal leaks so your AC doesn’t have to work overtime.

Start by sealing ductwork located in attics and crawlspaces. Next, check windows and doors. Look for additional leaks throughout the home around outlets, pipes, and wiring holes. Reducing leaks could lower your cooling costs by up to 30 percent.

Regardless of the energy efficiency of your 3.5-ton AC unit, there are practices you can adopt to increase your savings. These include regular maintenance checks, cleaning and replacing filters when necessary, and using a programmable thermostat to adjust the temperature when you’re away or asleep.

If your unit comes with a remote, using it to pre-set temperatures can also help maintain energy efficiency. Remember not to overwork your unit. Placing your unit in a shaded area can reduce its work by up to 10%, meaning less energy consumed and further savings. You can always talk to an HVAC professional about more ways to practice energy efficiency in your home.

Logan AC & Heat Services Installation Process

If you’re looking to install a 3.5-ton AC unit in your home, the team at Logan Services is here to help. Our installation process is quick, professional, and consistent. Here’s a look at what to expect when you work with us:

  • Book Your Installation: First, you can contact us online or at 866-840-1063 to book your installation. We’ll find an appointment date that works for you.
  • We’ll Dispatch Your Installers: Once we schedule your installation, you’ll get an email and text message from us on the day of your AC installation. This message will have the arrival time and a photo of the installers. Note that the average job takes 8-10 hours to complete. While we anticipate no issues, if a problem does arise, it could take us an extra day to complete the job. Our top priority is always doing the installation correctly and giving you the best value. We will always make sure you have heat or cool before we leave if the temperatures are extreme.
  • Meet Our Installation Team: Now, our installers arrive and introduce themselves to you. Depending on the job size, 1-3 technicians could work in your home. Our team will review the process and answer your questions before beginning.
  • We Prepare Your Home: The Logan Services team will respect and keep your home clean throughout the day. We’ll lay down drop cloths, wear shoe covers, and have necessary sanitary equipment. Before we begin, we’ll get an acknowledgment signature from you that permits us to work in your home. Our installers will check for any airflow issues before they start.
  • Installation Begins: Now, our team begins the installation. We’ll remove old equipment and install the new unit to ensure it’s safe and effective.
  • Start-Up System: After the installation, our team will turn on and test the operation to ensure the new system runs properly and meets industry standards.
  • Explain Thermostat: Once we confirm the new system’s operation, we’ll take the time to explain the functions to you. This includes walking you through setting up the thermostat app on your phone and explaining different add-ons for your HVAC system (like filters and humidifiers).
  • Clean Up: We’ll pack up now that the work is finished and we’ve answered your questions. Our team takes your old system to be recycled. Then we’ll leave the space as clean as when we arrived!

About Logan AC & Heat Services

With years of experience and a team of highly skilled technicians, Logan AC & Heat Services is dedicated to providing top-notch service and customer satisfaction. Whether you need a new AC system installation, repairs, or routine maintenance, we’ve got you covered. Don’t let the extreme temperatures control your comfort – take action now and give us a call at Logan A/C & Heat Services to ensure your home is cool and cozy all year round.


How many square feet will a 3.5-ton AC unit cool?

The cooling capacity of an air conditioning unit is typically measured in British Thermal Units (BTUs) per hour, not in square feet. However, as a rule of thumb, a 3.5-ton AC unit can cool approximately 2,500 to 3,000 square feet of space.

It is important to note that the actual cooling capacity can depend on various factors, such as the insulation of the space, the climate, the ceiling height, and the number of windows or doors in the area. To determine the appropriate size of the AC unit for your specific needs, it is recommended to consult with a professional HVAC technician.

How much power does a 3.5-ton AC use?

A 3.5-ton air-conditioning system typically uses around 3,500 watts, or 3.5 kilowatts, of power. This measurement refers to the system’s cooling capacity and is based on the rate at which the AC can remove heat from a room. The actual power consumption may vary depending on the unit’s efficiency, temperature settings, and usage patterns. It’s advisable to check the specific power requirements mentioned on the AC unit or consult the manufacturer for accurate information.

Should I replace my 20-year-old air conditioner?

Deciding whether to replace your 20-year-old air conditioner depends on several factors. Here are some things to consider:

  1. Efficiency: Older air conditioners tend to be less energy-efficient than newer models. Newer units are designed to meet higher energy efficiency standards, which can lead to significant savings on your energy bills.
  2. Repair Frequency and Costs: If your old air conditioner has been requiring frequent repairs or the repair costs are becoming substantial, investing in a new unit might be more cost-effective in the long run.
  3. Performance: If your current air conditioner is struggling to cool your space adequately or maintain a consistent temperature, it might be a sign that its performance is declining.
  4. Environmental Impact: Newer air conditioners often use more environmentally friendly refrigerants and technologies with a lower environmental impact.
  5. Comfort: Newer models have improved features such as better temperature control, programmable settings, and improved airflow, which can enhance your overall comfort.

It’s best to consult an HVAC professional when deciding if your AC unit needs to be replaced.

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