Assured Quality Heating and Cooling


We have used Assured Quality for approximately 5 years now and will continue to from now on. We couldn’t be happier with his work. He is very professional and courteous and just an all around great guy!
-Ardis K.
Octavian was very professional and listened and answered each question. Neat and well organized. Definitely will start seeing him twice a year. 10 stars!
-David C.
Mr. Rankin was professional & pleasant. Outdoor A/C unit didn’t make the noise I called about but he tightened some bolts & notified us of dirty coils. He was able to clean the coils while he was here. We wouldn’t hesitate to call again if we need A/C or heating repairs.
-Mark and Valerie M.
I was very impressed with this company. My AC was broken and the repair man was able to come the next day. His communication was excellent, and I knew exactly when to expect him. He quickly diagnosed the problem and was able to fix it. The repair man was friendly, honest, prompt and easy to talk to. I will be using them again!
-Christ Music Kids
Mr. Rankin was very courteous and professional. He had my AC unit up and running in a short amount of time. In this unbearable heat is was a blessing and the cost was reasonable. I will definitely refer them to my family and friends.
-Phyllis M.
We had a fantastic experience with Octavian and his team. They are such hard working people. They helped us in servicing one of our systems and replaced another system for us. They showed up on time, stayed late to finish our install and were great with business follow up along the way and afterwards. We love supporting small business owners like them. Highly recommend them for their knowledge, professionalism, service and great quality work.
Made the call to Assured when my AC went out. They showed up within hours of my call. Got my AC back up in running in 30 mins. Very professional and efficient service. Great price for repair!!!
-Rhamel B.
Have been using Octavian since I bought my house 5 years ago for regular maintenance on my units. his service has been great, prompt, and prices always fair.
-Ryan T.
Tech arrived on time and check system.He found the problem and fixed it. And will recommend this company to friends and family.
-Anthony M.
Excellent service and professionalism. I would definitely recommend and use in the future.
-Crystal T.
Excellent reasonable services. HIGHLY recommend… Don’t mess with anyone else like we did. Waste of time and money. Sooooo happy we found him on Nextdoor. Won’t ever use anyone else. If you’re looking to get your ac back up and running this is who you call!!!!!!!!!!!!!!!!!
-Danielle Maloney
The service was top notch the they where on time and very careful with floors and walls that they would not damaged. I would recommend this company at anytime for any of your hvac problems or maintenance.
-Keith F.
I have been using Assured Quality for a number of years, excellent service! I highly recommend!
-Ray M.
Very professional with great technical expertise.
-Timothy A.

Assured Quality Heating and Cooling



Mr.Rankin, delivered exceptional customer service during our repair for the A/C unit. His attention detail and punctuality is above the rest. We are truly please with his service and our A/C repair!

-Sheldon W.

Very professional, made sure his work was satisfactory and very informative!

-Sam P.

It was very good. They are really professional. They were on time for the appointment. Finished the job on time. Great price and they were very nice people.

-Eric C.

Very courteous and prompt. They will get the job done, throughly. I highly recommend this company!

-Ralph W.

Excellent service, on time, good communication and seems very knowledgeable!


Project: Replaced Gas furnace and A/C unit along with duct work. Octavian was very professional and straight forward. His estimates were fair and reasonable. He is a small business owner with a big owner style. Highly recommend! 


Same day service very pleasant to deal with handled all transactions over the phone. Would highly recommend.

Octavian was great. Came over was straight with me, and completed the installation of a new heat pump system that works great.

Heating Services

clean ductwork 1F

Furnace Repair

From the simplest maintenance to the most complex diagnostics, we can help, 24/7.


furnace installation

Furnace Replacement

Sometimes the most economical thing to do is replace your entire unit. Learn more.


commercial hvac thumbnail

Commercial Heating

We can keep your commercial building’s HVAC systems running, or design an installation from scratch.


Cooling Services

gas package units - example 3B

AC Repair

We get you back to feeling cool fast! Call now for emergency services or click to learn more.


heat pump to match air handler

AC Replacement

Is your system old and inefficient? We can help you replace it without breaking the bank. Click here!


commercial install 1b

Commercial Cooling

Customers and employees are expecting reasonable temperatures. Click here to keep ’em cool!


Service Areas

Our office is located in Charlotte, NC. We service the entire area, including:

  • Concord, NC
  • Cornelius, NC
  • Davidson, NC
  • Gastonia, NC
  • Harrisburg, NC
  • Huntersville, NC
  • Kannapolis, NC
  • Mooresville, NC
  • Newell, NC

We Proudly Recommend

Up to 10-12 year warranty*, call for details!

Assured Quality Heating & Cooling, LLC BBB accredited business profile