Had my unit installed two years ago by Cornerstone Air and have used this company a few times for tune up and issues with the AC. This company is the most reliable, professional and knowledgeable company that I have encountered in a very long time. The employees are amicable and very knowledgeable. My A/C wasn't cooling when I got home a few nights ago, I placed a call to Cornerstone Air about 7:30 pm and my call was returned within 1/2 hour; the A/C was fixed the next morning. Kudos to them.
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