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Serving Rockland, Orange, Westchester and Northern Bergen Counties

We won't leave you home or business until you're 100% satisfied

24 hour

Emergency Service


Design Air Inc — Heating and Air Conditioning in New City, NY

Allow us to introduce ourselves. Design Air Inc is a locally–operated full service HVAC company. We are located in Hillburn, NY, one minute past Suffern, and service Rockland, Westchester, Orange and North Bergen Counties. We’re proud to offer some of the area’s finest heating, cooling and indoor air quality products, with prompt and professional customer service. Regardless of the season or the temperature outside, we can make your home feel perfectly comfortable.

Part of the reason that customers choose us is our reliable 24–hour emergency repair service. If your system ever goes down we will have someone sent to your home ASAP to repair it. The majority of our competitors don’t take on the added expense of offering 24 hour emergency service, and because we have a large home base fully–stocked with replacement parts, we can repair most HVAC systems on the spot.

We’ve had the same owner since we started over 25 years ago, so you know that you aren’t hiring a company owned by a giant corporation that has to answer to stock holder. We are a local company run by a man who knows that honesty, integrity, and customer service is our future. In fact, the majority of the management team has been with the company for over 20 years, and all of our staff, including managers, are available to speak to our customers and help them out with whatever they need.

To further prove our dedication to quality service, here are a few of the major industry awards we’ve received:

  • Lennox ’Centurian Award’ – Top 100 Dealer in District – Specifically in customer service & Quality Installation
  • Angie’s List – Superior Service Award (2012)
  • NYSERDA – Energy Star Regional Winner

- NYSERDA – Energy Star Regional Winner
Please explore our site to learn more about our quality products and services. Check out our Special Offers page to find out how you can save money on your yearly service agreements!

We serve customers in Suffern, New City, Monsey, Nyack, Pomona, Nanuet, NY, and the surrounding areas. If you have any questions or would like to schedule an appointment, feel free to contact us any time. When you call, don’t forget to ask us about the Green Energy products that we specialize in!

Design Air Inc
  • RSES - The HVAC Training Authority
  • Design Air BBB Business Review
  • BPI GoldStar Contractor
  • Energy Star Home Performance
  • Angie's List 2014 Super Service Award
  • ACCA

25 years ago, you installed a heat/AC unit in a new room of the Kings Arms restaurant to which I owned & I’ve been using you ever since.

- G.S.

Experience was a pleasant one from start to finish.

- D.R.

Everything was done very well

- F.G.

I am pleased with the service of Design Air and the Lennox product.

- S.S.

He's always professional, polite, and explains clearly the diagnosis and his recommendations.

- P.O.

They did everything right. Courteous, professional. They were as good as you\'d expect them to be.

- S.A.

The benefits of choosing us
  • A true 24 hour service. Not an answering service with a return call in the morning
  • No waiting for parts or equipment - our warehouse is fully stocked.
  • Your tech will be background checked and fully trained (due to weekly trainings 8 months of the year)
  • Large enough to handle commercial/residential or complicated/simple jobs, just the right size to enough to keep quality high.

Learn More In Our Video

TV Commercials

Commercial one

Commercial two

Design Air Inc services Rockland, Westchester, Orange and North Bergen Counties, including these areas:

Design Air Inc

120 Route 59, Hillburn, NY 10931

Come Visit Our Showroom

(A Minute Past Suffern)
Open weekdays: 7:30am-5:30pm


24 Hour Emergency Service