Design Air, Inc

When temperatures drop in Missoula, you need a heating system you can rely on. Design Air, Inc. offers complete heating services for gas furnaces, gas fireplaces, and heat pumps. We handle everything from new installation and replacements to routine maintenance and emergency repairs.Our NATE-certified technicians understand the unique demands of Montana winters. We’ll assess your home’s size, insulation, and ductwork to recommend the most efficient heating solution. Whether you need a high-effic...

When summer heat hits Missoula, Design Air, Inc. keeps you cool. We specialize in air conditioning installation, repair, and maintenance for all major brands. From central AC to heat pump systems, we’ll help you choose the right cooling solution for your home or business.Our process begins with a detailed load calculation to determine the perfect AC size for your space—oversized units short-cycle, and undersized units struggle. We consider your home’s layout, windows, insulation, and sun exposur...

Ductless mini-split systems offer a flexible, energy-efficient alternative to traditional HVAC. Design Air, Inc. specializes in ductless installation, repair, and maintenance throughout Missoula—perfect for home additions, finished basements, garages, or older homes without existing ductwork.Unlike central systems that lose energy through duct leaks, ductless units deliver conditioned air directly into individual rooms. Each zone has its own thermostat, so you can set different temperatures for...

The air you breathe inside your home affects your health and well-being. In Missoula, seasonal allergies and wildfire smoke make indoor air quality more important than ever. Design Air, Inc. offers advanced solutions to remove pollutants, allergens, and odors from your home.Our signature service is Aeroseal® duct sealing. Leaky ducts waste energy and pull contaminants from attics and crawlspaces into your living space. Aeroseal seals leaks from the inside, improving efficiency and indoor air qua...

Design Air, Inc. has been handling heating, cooling, and indoor air quality for homes across Missoula for over 30 years. As a family-owned, Montana-grown company, we approach every job the way we would for our own house. We work on heating, cooling, and air quality needs, from quick repairs and full system replacements to ongoing maintenance. We start by listening to what your household needs, then give you an honest estimate before any work begins. Our technicians are trained to NATE standards...

When your furnace stops producing heat during a cold snap, we respond quickly to find the cause. Our NATE-certified technicians diagnose ignition problems, failed components, airflow restrictions, and safety concerns in gas furnaces. We explain what is wrong and what it will cost before we start the repair, so there are no surprises. We understand how hard Montana winters are on heating equipment, and we will tell you honestly whether a repair makes sense or whether replacement would serve you b...

Installing an air conditioner starts with a load calculation that determines the correct size for your home. Oversized units cycle on and off too often, and undersized units run constantly without keeping up. We look at your layout, window placement, insulation, and sun exposure before recommending a system from any major brand. Once you approve the plan, our crew installs the unit with attention to airflow and efficiency so it performs as designed. We will walk you through the options and expla...

A heat pump provides both heating and cooling from one system, which makes it a practical choice for many Missoula homes. We install, repair, and maintain heat pumps, checking refrigerant levels, electrical connections, defrost cycles, and airflow. Routine service keeps the system efficient in both seasons and catches small problems before they turn into breakdowns. If you are considering a heat pump, we can assess your home and tell you whether it suits your heating and cooling needs. Many of o...

Ductless mini-split systems are a good fit for home additions, finished basements, garages, and older houses without existing ductwork. Each indoor unit serves its own room or zone, and each zone has its own thermostat, so you control temperatures where you need them. Because no ducts are involved, there is less energy lost to leaks and less dust circulating through the house. We design a layout based on your space and install the indoor units high on the wall or ceiling, where they stay out of...

When your air conditioner fails during a hot Missoula afternoon, call us and we will work to get it running again. Our technicians diagnose the cause quickly, whether the problem is a failed compressor, a fan issue, a refrigerant leak, or a control problem. If your AC is making strange noises, short-cycling, or not cooling properly, we will find the root cause and explain the repair options. We give you an honest estimate before any work begins, so you know what to expect and can decide how to p...

Regular furnace maintenance helps prevent breakdowns during the coldest weeks of the year. Our visits include a thorough inspection, cleaning of key components, and safety checks on gas connections, burners, and venting. We also look at airflow and filter condition, since restricted airflow is a common reason furnaces lose efficiency and wear out early. Our maintenance plans make scheduling simple and help you enter winter prepared. Well-maintained equipment runs more efficiently, which can help...

Good indoor air matters year-round, and seasonal allergies and wildfire smoke can make it harder to breathe at home. We start with an assessment that checks humidity, particulate levels, and the condition of your ductwork. Our recommendations might include high-efficiency filtration for allergens, UV germicidal lights for mold and bacteria, or a whole-home humidifier or dehumidifier. Aeroseal duct sealing is one of our signature services, sealing leaks from the inside so contaminants stay out of...