The question we asked
“My furnace is acting up. Who are the best HVAC companies in Denver, CO that you'd recommend?”
Who ChatGPT named
- The Weather Changers Heating and Air Conditioning
- Comfort Pros Heating and Air Conditioning
- Roots Heating & Air
- Controlling Systems Heating, AC, and Electrical Repair
- Davey Heating & Air Conditioning
Listed in the order ChatGPT gave them on October 27, 2026. This is ChatGPT's answer, not our ranking or endorsement.
How we ran it
- One question, worded the way a customer would ask it, in a new temporary ChatGPT chat with no earlier conversation.
- We recorded the businesses named in the answer, in order, on the date shown.
- AI answers vary by wording, location, account and time. A single run is a snapshot; we re-run it over time and keep each result on this page.
Why some well-known HVAC companies are missing
Plenty of established, well-reviewed HVAC companies in Denver were not named. AI assistants build answers from what they can find and trust about a business across the web, so strong reputation offline does not automatically carry over. Advertising elsewhere does not carry over either: paying for search or social ads does not put a business into ChatGPT's answer.
When an assistant gives a customer five names, the businesses outside those five are not part of that decision. Our guide to share of answers explains how to measure this over time, and our HVAC companies page covers how AI visibility and AI ads work in this industry.