Never Spend Another Day HOT with Design Air Inc.

Bringing Comfort Back Into Your Home With Air Conditioning and Heating

Air Conditioning, Heating & Plumbing Services In The Inland Empire.

Design Air Inc. provides a full array of services to both residential and commercial customers in Riverside, CA, and the surrounding region. We are a family-owned and operated local company that prides itself on offering the most competitive prices and the highest level of dependable and friendly customer service you’ll find anywhere in the Inland Empire. Whether you need air conditioning repair, solar panel installation, or plumbing services, you need to look no further for top-quality contractors who can get the job done right the first time.
For additional information about our services, or to schedule an appointment, call us today at (951) 379 3362

We Offer Flexible Financing Programs

$0 Money Down 0% Interest For 60 Months on Approved Credit

Air Conditioning



Why choose DAI for your home services?

We are a Whole Home Energy Solutions Company. We offer expert services for Air Conditioning, Heating & Plumbing. We do it all! 

There are so many benefits to choosing a contracting company that offers multiple services; 

  • Have different types of home projects completed at the same time
  • Bundling projects allows for major discounts 
  • When financing, you can combine multiple projects at the same time for ONE low monthly payment 
  • Our experts coordinate with each other, so you don’t have too 
  • All of this will save you a ton of money, time, and sanity

When would you bundle services?

Let’s say you are interested in a new HVAC system but your old water heater also needs an upgrade and needs to be replaced, but you don’t have the money for both. What do you do? Well, that is where we come in. When financing, you are able to combine our services, giving you one small monthly payment. With ZERO MONEY DOWN, you can afford to replace your old, broken HVAC system and get that new tankless water heater at the same time. The amount of money you will save on electricity will more than pay for both projects! We also offer air scrubbers, duct cleaning/ replacement and so much more!

When you hire a contractor it is important to make sure they are still going to be in business when you need them. We have been in business for over 21 years, we are established in our community and we are not going anywhere. We will always be here when you need us. We have been and still are a local Veteran Family Owned & Operated company based out of Colton, Ca. We will continue to offer the best customer service combined with the best prices around. 

Need HVAC Service? Call us Today!

We Install, Service & Repair All Major Brands

Meet The Design Air Team!

Design Air has been Veteran Family Owned & Operated since its start in 2001. The owner Paul has over 35 years of experience in the Air Conditioning and Heating industry. After he was discharged from the Air Force, he worked for several years in the HVAC field. Through his experience, he saw companies take advantage of customers and their employees. So he decided to make a change. He decided to go into business for himself. With help from his late wife and his family, he was able to open Design Air, Inc. Over 20 years later, Design Air has grown to offer more than just air conditioning and heating, we are proud to also offer Plumbing services. When we say we are family owned and operated, we really mean it. With Paul, 3 of his children, their spouses, and 3 nieces and nephews all working for us, we truly are family. From our family to yours, we treat all of our customers like family too. We pride ourselves on providing the best customer service, with the best prices and all served with a smile. 

Recent Customer Reviews

Sara S.Sara S.

Design Air Inc./ now Marathon HVAC Services - Excellent and fast service, knowledgeable team at all levels, from customer service to individual service...

David M.David M.

Chris Did A Great Job !

Design Air Inc. was sent to my house from Select Home Warranty to work on my toilet problem. Chris was very nice and did a great...

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Our Recent Projects

Condenser Replacement in Moreno Valley, Ca


A/C Replacemnet in Lake Elsinore, Ca


Condenser and Heater Change Out in Lake Elsinore, Ca.