Air Conditioning

In 1993, only 68 percent of homes in the United States had air conditioning. By 2017 that number had jumped to 90 percent. Today, an air conditioner is a standard appliance in Montana and as essential to most families as a car, a microwave, or a refrigerator.

Air conditioning units have made incredible leaps in technology and efficiency in the last few years, making installing and operating a Missoula home or small office air conditioning unit incredibly affordable.

In 2010, the most common refrigerant used in small air conditioning units, R-22, was banned in the European Union (EU) and the United States as part of a phaseout of ozone-depleting chemicals. In preparation for the ban, the heating, ventilation, and air conditioning (HVAC) industry moved toward R-410A as the replacement for R-22.

The adoption of R-410A in home and small office air conditioners began a new era in high-efficiency air conditioning systems. Air conditioning units are more efficient, have a smaller footprint, and quieter than ever before.

Design Air has been replacing older R-22 units with new R-410A equipment for years. Call our team at 406-251-7997 and we will help you find the right unit for your home. Request air conditioning service online today.

Ductless Systems

The era of ultra-high efficiency heating, ventilation, and air conditioning (HVAC) units is here. Ductless systems are small, wall-mounted, single-zone heating and air units with cooling Seasonal Energy Efficiency Ratio (SEER) ratings near 30 compared to standard units with a typical SEER around 18. It is not uncommon in Montana for homeowners to see substantial savings in their energy bills the first month after installation of a mini split system.

Mini split units solve multiple problems at once. High efficiency makes a ductless system an outstanding replacement for an older HVAC unit. The ability to connect multiple ductless units to one condensing unit creates a zone control system, bringing high efficiency to multiple rooms. These systems offer extra benefits for your Missoula home and can save you money overall.

Is your home right for a new ductless system? One call to Design Air at 406-251-7997 and we can survey your home to see which ductless system will serve you best. Request ductless system service online today.


The last 10 years have seen incredible advancements in home-heating technology. The standard efficiency home furnace installed in most houses in Montana is becoming obsolete. In its place is an impressive lineup of gas furnaces that do everything from make instant hot water, warm radiant floors, and feed radiator systems.

This new supply of gas heater is more compact and more efficient than ever. In addition to our fast furnace repair, replacing an older gas furnace with a new, 95 percent efficient condensing furnace is one of Design Air’s most common heating equipment calls.

A condensing furnace achieves high efficiency by using the hot combustion gasses, or flue gas, to add an additional stage of heating to the water. Extracting more heat from the flue gas causes the gas to condense in the furnace, creating cooler flue gases that can be vented with PVC pipe instead of expensive double wall flue pipes. Missoula homeowners realize immediate savings on their gas bills with a condensing furnace.

If you have an old electric furnace, call 406-251-7997 . We can work together to install a new high-efficiency furnace. Request furnace service online today.

Gas Fireplaces

Gas fireplaces have come a long way in the past couple decades. There are many options available with something for every taste. A gas fireplace could be a great option for you if you are looking for that type of ambience in your Missoula home.

These fireplaces are easy for our professionals to install and look amazing. The newest models are much different than the models of even five years ago. When you add a wide variety of styles, the easy on and off switch, and the sheer coziness of a fireplace to your Montana home, a residential gas fireplace becomes a much more appealing option.

It is worth noting that while these may seem easy to install and a tempting do-it-yourself (DIY) project, these fireplaces need to connect to a gas line. Anytime you are working with gas, you can’t take chances—installing a gas fireplace is best left to the professionals.

Considering a gas fireplace for your home? Our Design Air professionals are ready and willing to help—call today at 406-251-7997. Request gas fireplace service online today.

Heat Pumps

The most common service we at Design Air provide to our customers in Montana is the repair and maintenance of residential and light commercial heat pumps. We are known throughout the Missoula area as the company to call when customers need heat pump and mini split heat pump maintenance. In addition to making quick and affordable repairs, we provide residential and light commercial maintenance maintenance agreement plans and full unit replacements.

There is a dizzying array of choices when it comes to replacing and installing heat pump systems. What manufacturer is best? Should you buy a high-efficiency or standard-efficiency heat pump? What about all the different kinds of thermostats?

Homeowners should not make these decisions on their own. We love to help our customers make informed choices regarding their new uni—choices that fit their needs and their budgets.

Call us at 406-251-7997 to set up an appointment at a convenient time and walk you through all the choices. Request heat pump service online today.

Indoor Air Quality

Do you find yourself feeling tired all the time? Are you suffering from allergies, asthma, or constant respiratory distress? Although these things can originate from many different sources, poor indoor air quality is a possibility.

Our team at Design Air here in Missoula wants to help you ensure a healthy home. We will come out and test the air quality in your Montana home. If they find any issues, they can provide remediation services to help you improve it.

Everyone has dust and dust mites in their home as well as some level of chemicals released from carpeting, cleaning supplies, and other household substances. In addition, if you have pets, you will generate more hair and dander. Smoking also adds particulates to the air. All of these things can contribute to an indoor air quality problem.

Testing of indoor air quality is something we do every day. If we find issues, our experienced professionals might recommend remediation such as air duct cleaning or replacing your air filters in your heating, ventilation, and air conditioning (HVAC) system. A wide variety of air filtration and air purification systems are available on the market today as well, which can help improve your indoor air quality.

Call our team at Design Air today. We can be reached at 406-251-7997 to provide information or answer questions. Request indoor air quality service online today.


Everything has its season, and your heating, ventilation, and air conditioning (HVAC) system is no different. Your furnace puts in overtime during the chilly winters while taking a rest in the summer, and your air conditioning unit works on the opposite schedule in Montana. Our team at Design Air recommends that right before your furnace or air conditioner goes into high gear you schedule an HVAC maintenance service call.

Our trained professionals will conduct a complete inspection and cleaning of your HVAC system. Talk with us about our multipoint inspection. It includes a filter change, lubrication, pressure and safety check, and much more. You will also have a trained eye on your system so any potential problems can be caught quickly and repaired before your HVAC system stops working.

In the long run, investing in HVAC maintenance can save you a great deal of stress and money in your Missoula home. A well-maintained system will not only function better, but it will consume less energy every day. In addition, it can help increase the working life of your whole system, making it less likely you will have to invest in a new furnace or air conditioning unit prematurely.

When you are ready to schedule your HVAC maintenance visit, contact Design Air at 406-251-7997 . We would be happy to answer questions or share more details. Request HVAC maintenance service online today.

Air Conditioner Installation in Missoula, 59803

“Design Air has always provided us with on-time quality service with friendly, courteous, and knowledgeable staff. Tristan and Casey recently installed our new A/C unit which was a very clean and tidy job.”
- Scott H.

Ductless Mini-Split Installation in Missoula, 59801

“Tristan, Will, and Casey installed my ductless AC unit very efficiently. They ran into a problem with the coolant line that was out of their control and they worked diligently to fix the issue. They were personable, polite, and courteous of my apartment and I would definitely use them again in the future.”
- Christopher F.

Ductless Mini-Split Installation in Missoula, 59802-2137

“Tristan and Casey provided a friendly and professional service. Initially I was taken back from finding out the requirements of the system to be three feet from the electrical box and the unit being 18 inches in the air. Casey did a great job in placement of the unit outside our front door that works great. They were very respectful of our house and left it clean.”
- Will W.

Air Conditioner Installation in Missoula, 59803

“Very professional and easy to work with. Great communication through the whole process. Tristan and Casey were hard at work the whole time during the installation and got it done in a timely manner. They respected the property and took all the steps to make sure they left it as it was inside and out. They used shoe coverings, laid down runners where they were walking and cleaned anything they needed to. They also were very friendly with the dogs too, which was great. Would highly recommend!”
- Darbi A.

Gas Furnace Installation in Missoula, 59804

“Miles was our installer for an air conditioner unit and replacement furnace. He was professional and easy to have around during the days of installation. He showed up on time, answered any questions we had and put up with our lab wanting to play ball. So far, we are very happy we chose Designair.”
- Dawn K.

Air Conditioner Installation in Missoula, 59841

“Tristan was amazing! He was very polite, kind and informative. He answered all of my questions with great knowledge. He cares about the customer, Thank You, we will love our new AC!”
- DeVoe and Margaret C.

Gas Furnace Replacement in Missoula, 59802

“Very pleased with the whole team. Nate evaluation, Steve sales, Melisa communication, Miles and Will instillation; they were all friendly, polite, knowledgeable, and professional. Made a tough time easier. Thank you all. Stay safe. John and Karen”
- John R.

Gas Furnace Installation in Missoula, 59803

“Miles and Cody arrived promptly to my home; were clean, organized and friendly. They explained what they would be doing, answered all my questions and updated me along the way. Before I knew it, the new gas furnace was installed and running smoothly. I highly recommend these guys to anyone – they are extremely professional. Thanks Design Air!”
- Amy S.

Gas Furnace Replacement in Missoula, 59801

“No one wants to be without heat during the winter, but when that is where I found myself, Design Air helped me out. They brought in space heaters while we waited for the unit to arrive, and then Tristan and Cody installed my replacement furnace with no mess. Tristan even returned the next week to update and expand the duct work to maximize the efficiency of the new unit. I am very happy to have heat and I am excited to have smaller monthly energy bills. The guys were great and knowledgeable and happily explained things each step of the way. Thank you all!”
- Heidi H.

Gas Furnace Installation in Missoula, 59803

“The technicians assigned to our project, Miles, Cody, and Tristan were prompt, focused on the installation of both a furnace and an AC unit, and were engaging and informative throughout the length of the project. Thanks to this Design Air crew for a job well done!” – Hal C.
- Hal C.