How Do Ductless Mini-Split Systems Work?

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How Do Ductless Mini Split Systems Work? 

A ductless mini-split air conditioner functions similarly to a standard central air conditioner but without the ducts. How is this even possible? How do ductless mini-split systems work? In the article below, our HVAC contractors in Minneapolis, MN, share the must-knows of mini-split A/C systems. 

How do Ductless Mini-Split Systems Work?

Warm air from your home is blown over cold evaporator coils by the indoor unit. A/C refrigerant that circulates through these coils absorbs heat from the air and transports it to. The outside unit is where the refrigerant dumps all of the heat it has extracted from the air in your house. The indoor unit of a traditional split system air conditioner is now housed in the attic or closet. Ducts transport air from your home to this central location, where it is cooled and then returned to your home via additional ducts.

However, in a mini-split ductless system, the unit isn’t located outside. It’s located in the space that’s being cooled. The presence of the indoor device in the space removes the need for air ducts. The indoor device actually draws warm air from the space it is in and blows cold air back into it.

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Can a Ductless Mini Split System Cool a Whole Home?

Many Twin Cities residents ask if ductless mini-split systems can cool the entire home. Our A/C contractors are happy to share that these A/C systems can cool your whole home. Additionally, it’s recommended that customers have multiple indoor units that are linked to a single unit. 

Benefits of a Ductless Mini Split

A ductless mini-split air conditioner has many benefits over a conventional central air conditioner. Here are the following advantages of installing a ductless mini-split system

Installation Made Easy

One of the biggest advantages of ductless mini-splits is easy installation. If you’re adding air conditioning to your space or home that doesn’t already have ducts, mini-split systems can be a perfect alternative to the cost of building a lot of ductwork.

Can Be Used for Heating & Cooling

The majority of ductless mini-split systems are heat pumps. That is, they can both heat and cool your house, removing the need for a separate heater. Want to learn more about heat pumps? Contact our heating and cooling company in Minneapolis for more information. 


Since these types of A/C systems do not need ducts, you’ll also get the benefit of zoning. Each area of your home will have its own indoor unit. So, you’ll be able to adjust the temperatures of each room separately. In contrast, traditional air conditioners will cool your entire home, whether you’re using that space or not.

Improved Energy Efficiency

When you choose to have a ductless mini-split system installed, you won’t have to worry about any air escaping in the vents or ducts. Our friends at Gilmore Heating, Air, and Plumbing, an air conditioning company in Sacramento, agree that you’ll have more cold air, and you’ll be saving energy since your system will cool your space faster. According to Energy Star, anywhere from 20-30% of airflow is lost within the home’s duct system due to gaps or leaks. 

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Are There Disadvantages to Ductless Mini Splits? 

Sure thing. Ductless systems are typically around 30% more costly than central air conditioners—but keep in mind that doesn’t include ducts. Some people don’t like the appearance of ductless min splits. HVAC contractors recommend weighing out the pros and cons before getting an air conditioning replacement

For professional HVAC services in Twin Cities, contact McQuillan Bros. Our air conditioning technicians are happy to provide you with an A/C estimate and recommend the best solution for your home. We also offer high-velocity HVAC systems, if that’s something you’re considering. Call McQuillan Bros to learn more. 

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What is a High-Velocity HVAC System?

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What is a High-Velocity HVAC System?

Are you tired of your old HVAC unit not working? A high-velocity HVAC system may be just what you need for your St. Paul, MN home. Our HVAC professionals share everything you need to know about replacing your unit with a high-velocity HVAC system

How a High-Velocity System Works

In principle, a high-velocity HVAC system works in just the same way as the traditional HVAC systems. A compressor or heat pump located outside your Twin Peaks, MN home supplies the cool or heated air, which then moves through a system of ducts to every room in your home.

However, that is just about all there is for the similarities between high-velocity systems and the traditional HVAC systems. High-velocity air conditioning systems rely on smaller tubing to deliver conditioned air to all parts of a home. This tubing is flexible and is approximately 2-inches wide and has a vent that is 5-inches in diameter. In comparison, traditional ductwork is much wider and has vents. 

The high-velocity air handler pumps the cool or hot air under high pressure to the vents. Because of the high pressure at which the conditioned air travels, it can circulate a room a lot faster than the air from a traditional HVAC system. Ultimately, you can cool or heat your home much faster if you have a high-velocity HVAC system.

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High-Velocity HVAC Systems for New Construction and Retrofits

Air conditioning replacement MN professionals assert that high-velocity HVAC systems are not only ideal for new construction; they are also great for retrofitting into an existing home.

In new construction, it is very easy to integrate the high-velocity system into the home’s design. Similarly, the smaller and flexible tubing of high-velocity air conditioning makes these systems a breeze to retrofit into your existing home. Obstacles, such as studs in walls, can be worked around since the tubing can bend around those existing elements in the wall or floor. 
These attributes make installing high-velocity HVAC systems affordable, as your air conditioning St. Paul technician will tell you. 

The Advantages of a High-Velocity HVAC System

Easy installation. As already mentioned, a high-velocity system is easy to install since the small and flexible tubing can be maneuvered around obstacles. This ease of installation means less disruption of your home (no dismantling walls and ceilings, for example), and it is much cheaper to install than replacing the ducts and vents.

Better aesthetics. The smaller vents of high-velocity HVAC systems are less noticeable, and they can be tucked away out of sight. Many St. Paul homeowners prefer high-velocity HVAC systems for this reason.

Lower operating costs. Since the high-velocity heating and air conditioning typically warms or cools your Twin Peaks home a lot faster than other systems, it runs for a shorter amount of time. Our friends at Gilmore Heating and Air, an AC company in Placerville, agree that high-velocity systems use less energy and reduce your overall energy costs.

One unit is sufficient for a home. If you have been relying on multiple wall-mounted AC units to cool or heat your home, you will be pleased to learn that just one high-velocity unit can get the job done.

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Potential Drawbacks of High-Velocity HVAC Systems

Installation could be time-consuming. We mentioned that our St. Paul, MN HVAC technicians can install a high-velocity system without tearing down the drywall, but that also means that the installers would be working “blind” since they have no way of knowing what’s behind the walls. Unexpected obstacles can slow down the installation process, but luckily, the tubing flexibility means that no obstacle will be substantial enough to derail the installation process.

Some systems are noisier than others. If you don’t work with an experienced professional from McQuillan Bros when selecting a high-velocity air conditioning system, you could end up with a unit that emits a lot more noise than your old AC unit. We ensure that we select models with noise-attenuation features so that your home is as quiet as you want it while the AC is running.

As you can see, the benefits of high-velocity air conditioning systems greatly outweigh the drawbacks. However, since each home is different, it is best to talk to one of our experts at McQuillan Bros to assess your specific needs and recommend the best course of action. Contact us today to learn more about our high-velocity HVAC system for your home!

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What to Look for When Hiring an HVAC Company

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What to Look for When Hiring an HVAC Company in MN

Many homeowners take great pride in taking care of their home. There are always little projects or things to do around the house. Owning a home means that you’re responsible for maintaining and replacing any and all appliances, including your HVAC system. 
You’ll need to find the best HVAC company in Twin Peaks if you want to keep your house in order. HVAC companies are responsible for installations, repairs, and maintenance. So, what should you look for when hiring an HVAC company? Here are some of the things you need to consider when searching for the best HVAC company in Minneapolis


Efficiency is one of the most important things to consider when hiring an HVAC company in MN. Your HVAC technician should be able to thoroughly serve you with high levels of efficiency and communication. 
In the event you need an air conditioning replacement, they should be able to provide you with the best AC units on the market. At McQuillan Bros, you will never be surprised. We will always be open and honest about our services and are happy to be of service.

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Licensing and Experience 

A new HVAC system is not cheap, so it’s important to choose a well established and experienced HVAC company. Your HVAC contractor should be highly trained to install, repair, and carry out maintenance on all HVAC systems. Our friends at Gilmore Heating and Air, an HVAC company in Sacramento, recommends checking the licenses provided by your local company to makes sure they have experience handling HVAC systems. 
We’ve been serving the Minneapolis and St. Paul areas since 18833. We are known as Minnesota’s Original AC professionals. So, if you ever need an HVAC service in MN, you can always count on McQuillan Bros. 

Rebates and Special Offers 

Given the amount of money you are likely to spend throughout your HVAC system’s lifetime, it helps to know that you can get discounts every now and then. Your HVAC contractor should be able to offer rebates and special offers based on the energy efficiency of your HVAC system. This will go a long way in saving you money. You can always contact McQuillan Bros to learn about some of our HVAC special offers. 

References and Referrals 

The best way to determine if you have the best HVAC company in MN is by looking at references and referrals. Most homeowners are quick to refer the best technicians to their friends, families, co-workers, and neighbors. A highly recommended technician is more likely to deliver quality service. 
You can always search online for an HVAC company near me. There you will find the best HVAC companies in your area, and you can scroll through customer reviews. Facebook, Yelp, and Google My Business are one of the best places to read reviews. 

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Finding the best HVAC Company in MN

There is a lot of work involved in keeping your HVAC system in its best condition. Working with trained professionals who value your time and provide quality services is essential. At McQuillan Bros, we are dedicated to providing you with the best services possible. Contact us today to learn more about what we can do for you. 

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Complete the form below and one of our team members will give you a call to help get you scheduled. If you have an urgent need please call us at
(651) 243-4002