95.8% would refer friends and family to us

5 stars Verified customer

Always outstanding service!

2 stars Verified customer

Was told diagnostic was 109 when I scheduled but instead charged 129. Also didn't have much confidence in the technician, seemed very junior. Whole job took almost 3 hours for what ended up being a loose wire

5 stars Verified customer

Always very friendly and explains everything before doing it.

5 stars Customer since 1999

I rely on Gartner and feel very secure knowing that my air conditioning and heating needs are under their care. I have been their customer for two decades and I am very satisfied.

5 stars Customer since 2014

Wow! We had a crisis that would have cost my business thousands of dollars a day as we were closed without AC, but Gartner came through for us FASTvand very professionally- best HVAC company I have ever worked with in my life.

5 stars Customer since 2011

Always on time and professional even as they have to work their way past the slobbering 80pound dog(whom they ALWAYS pet and fuss over.)! They are always extremely nice They never try to push other services. When I asked about when I should call about my winter check up he informed me about their service plan that if I have both done every year that it would save me money and they will call to remind me. Since I can't remember alot of things these days that will be a huge help. When I had a radiator pipe birst in my living room last year- Darren made sure it was fixed quickly and properly. Since I live in an 85 year old home that's not always easy but they took care of it promptly. I highly recommend Darren and his whole of technicians. Susan Cook

5 stars Customer since 1986

They are incredibly professional and know what they are doing. Prompt, friendly; always gentle reminders to change filters, but always bring filters with them knowing you won't member. Would not buy equipment or have it serviced from any other business.

5 stars Verified customer

Friendly, competent service. Answered all my questions graciously. Didn't hesitate to go the extra mile for good customer service.

5 stars Customer since 2013

Tim is my Gartner service person & I would not have anyother person into my house. Tim is wonderful

and he has a terrific personality. Also, he i very intelligent. I hope that this review will be entered into

his record so that when it's Money Raise Time this review will be considered.

Thank you, Carolyn Cooper 847-275-9445

5 stars Verified customer

Technician arrived on time. He phoned about 20 minutes before his arrival as requested. Very efficient and helpful, as is always our experience with Gartner.