Copp OakThe short version
- Most-named: PV Heating, Cooling & Plumbing, in 8 of 18 answers. Estes Services was next, in 6.Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
- Booking: ChatGPT offered to help book in 4 of its 9 answers. Gemini: 0 of 9. In 13 of the 18 answers, there was nothing beyond a phone number or a website.Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
- Where it breaks: Asked outright to book, Gemini said it couldn’t in all 3 answers. ChatGPT opened an in-chat booking form in 2 of 3. None of the 18 answers ended in a booked appointment.Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
Who ChatGPT names most (9 answers)
| Business | Answers naming it (of 9) |
|---|---|
| PV Heating, Cooling & Plumbing | 6 |
| Indoor Experts Heating & Air Conditioning | 4 |
| inAir Heating & Air Conditioning | 3 |
| Comfort Atlanta Heating & Air | 2 |
| Cool Air Mechanical | 2 |
| Essential Heating & Air Conditioning, Inc. | 2 |
| Estes Services | 2 |
| Moncrief Heating & Air Conditioning | 2 |
| O'Callaghan Heating & Air Conditioning | 2 |
Who Gemini names most (9 answers)
| Business | Answers naming it (of 9) |
|---|---|
| Coolray Heating & Air | 5 |
| Reliable Heating & Air | 5 |
| Estes Services | 4 |
| Cool Air Mechanical | 3 |
| Moncrief Heating & Air Conditioning | 3 |
| Anchor Heating & Air | 2 |
| Atlanta AC Rescue | 2 |
| Empire Heating & Air Conditioning | 2 |
| PV Heating, Cooling & Plumbing | 2 |
Ties are listed alphabetically. Across both assistants, 29 different companies were named, and 7 of them appeared on both. When we compared the two answers to the same question, ChatGPT and Gemini had at least one company in common in 4 of the 9 pairs. The other 5 had no overlap at all.Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
Can you book them?
Three of the nine questions asked the assistant to book outright: the “soonest slot” request, “Can you book…this week?”, and “Find me…and book the appointment for me.”Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
- Gemini said it could not complete the booking itself in all 3 of those answers. It gave phone numbers or company websites instead.Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
- ChatGPT opened an in-chat booking form in 2 of the 3, asking for things like a ZIP code or service address. In the third, it listed companies and asked for a ZIP code.Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
Our tester stopped at every form without entering anything. Across all nine questions, ChatGPT offered to help book in 4 of 9 answers and Gemini in 0 of 9. In 13 of the 18 answers (ChatGPT 6 of 9, Gemini 7 of 9), there was nothing beyond a phone number or a website. The homeowner gets a list and has to call, click or keep searching.Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
Named isn’t booked.
The takeaway for an Atlanta HVAC shop
The two assistants keep different shortlists here. ChatGPT leads with PV Heating, Cooling & Plumbing. Gemini leads with Coolray and Reliable, which ChatGPT never named. Estes, Cool Air Mechanical and Moncrief show up on both. And whoever gets named, Gemini never offered to book and no answer ended in a booking. The opening is the step after the name.Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04)
Method & data
9 customer questions × ChatGPT and Gemini, one paired run per question, captured November 4, 2026 (UTC) in our v2.1 re-run of the sweep. These answers are not part of the 5,788-answer study (collected October 5–28, 2026, across 20 Southeast U.S. metros), and we don’t compare or trend them against it. In that study, 79.1% of sampled ChatGPT/Gemini answers offered neither a booking path nor a connector (4,578 answers); on Gemini the rate was 92.2%. Neither the study nor this re-run measured completed appointments, and neither tested Google Search’s AI Mode. ChatGPT ran on its “Instant” setting and Gemini on “Flash”. When an assistant asked for a ZIP code or address, none was given and no form was submitted. A company counts once per answer. Obvious spellings of the same business were merged (for example “PV Heating & Air” and “PV Heating, Cooling & Plumbing”), and names we couldn’t confidently match were kept separate. This is a count of mentions, not a review or a quality rating, and AI answers vary from run to run.Sources: https://coppoak.com/journal/top-hvac-companies-atlanta-ga-according-to-ai#method-heading (retrieved 2026-11-04); https://doi.org/10.5281/zenodo.23745742 (retrieved 2026-11-05); https://coppoak.com/canopy/research/ai-assistant-booking (retrieved 2026-11-05)