• Our heater somehow stopped working right on Christmas Eve late afternoon when it was during the unusually cold week. Due to the bad timing, we had to call a few places. We left a voicemail message with Dariush. Within an hour, he called us …

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  • Air One Tech has been awesome! I highly recommend. From the front desk (Allison) to my HVAC tech (Sean) — I’ve had nothing but positive experiences with these folks.

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  • Air One Tech replaced my HVAC in May 2022 - they not only beat competitors’ pricing, but Dariush provided a positive customer experience and took the time to walk me through the process. During the quote, he had a related binder with images …

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  • It's very simple, they do good honest work. They fixed an issue with our ac which turned out to be just a loose wire. Charged a minimal amount of money. I feel good about my maintenance contract with Air One.

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  • We got quotes for a new HVAC system from several companies. This company was among the best in terms of price. What made me ultimately choose them was the promise of great customer service going foward. I can say now 4 months post …

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  • Air One has always been prompt, efficient and honest. Their techs are very professional and friendly. We always feel that their advice is upfront and generally what we expect.

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  • Called them for an issue with my in home humidifier. They came out the next day and identified the issue. One day later (had to get part) my issue was resolved. The price was affordable and the service was prompt and professional. I’d absolutely call them again — recommend you do the same.

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  • Immediately responsive first thing on a Monday during a very short holiday week. A technician was at my home within 5 hours and repaired my heating system in under 60 minutes. Offers a military discount as well!!

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  • Air One Tech LLC is one of the three companies we received quotations. The Trane system Air One Tech recommended we thought was the best system according to the efficiency and price. What made us the happiest was the result we received. For the five months we used the new Trane air conditioning system, it saved us several hundreds of dollars on the electric bills. The services of the company is great. They responded to our service calls in very short time. The service calls were usually because of our lacking of knowledge to the new system. In short we are very happy with our new heating and air conditioning system.

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  • Air One Tech is considered the premier HVAC services company in the Northern Virginia, and we feel much secure when we have a yearly maintenance contract with them since 2018. …

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  • The condenser coils were thoroughly cleaned and the contactor was replaced. Air One Tech does a good, honest job. Their customer service is very good.

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  • Air One Tech - tech Sean & Alisson have been spot on & always so courteous & nice. They go above & beyond to help & make sure all is good. Follow-up & communication is awesome. Thank you!!

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  • We were quite satisfied. We had a standing contract with another HVAC service company and they were pushing upgrades and a new furnace on us and we wanted a second opinion. Because the other company had expressed a concern about "potential" carbon monoxide leakage, we were hoping for quick response on the part of Air One Tech. The owner himself came out to inspect the furnace within days of our call, and said that, while it is always recommended to replace a furnace proactively and that there were definite signs of age, the furnace is mechanically sound for now. He also pointed out (with pictures) evidence of blower deposit build-up (that should have been regularly cleaned under our contract with the other company) that was likely caused by an air filter housing that had never been resized after removal of an old electronic air filter and was basically allowing unfiltered air to get by. We were able to push back on the other company to do the work needed as part of their maintenance agreement and only waiting until their contract runs out so that we can switch maintenance over to Air One Tech.

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  • Air One Tech installed new AC and Heating systems. The team was very professional and efficient. The pricing was more than competitive. High score on value for money. Finally, explanations on technical matters were provided in an easy to understand and concise manner. Air Tech One is a trusted vendor.

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  • Very professional evaluation of a complex problem, Dariush listened carefully and took appropriate measurements. After discussing and agreeing on a solution, it was done quickly, cleanly, and with minimal disruption of normal activities.

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  • The prompt response sped up our decision making to have our old AC and heating systems replaced. The installation crew was on time and all three of them worked hard and completed the installation by the end of the day. So far the system works great and it takes a lot less time to get the whole house to our desired temperature .

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  • Excellent service and followed all protocols. From beginning to end Sean was fantastic and proactive, best of all after issue resolved and after a couple days without AC I wish I had called earlier. Received same day service and a full diagnosis , I would highly recommend this company in the future.

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  • Extremely helpful and knowledgeable. They were able to work me in at the very last minute. Recommendations were things that were actually needed vs running up the bill. He even made recommendations on how to keep cost low.

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  • Love this company, especially Darren. He is pleasant, on-time and knows what he is doing. Highly recommend but make sure they are sending Darren. This company really helped me out coming out quick last summer when a blown seal on my heat …

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  • Air One Tech LLC was quick to respond, timely, professional, and perhaps most valued of all, honest. AOT owner, Dariush, took extra time to explain details of the AC installation job that were unclear from competitors' quotes. He …

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