The ranking
Companies AI named when asked for the best HVAC company in Markham. "Both engines" means ChatGPT and Perplexity independently recommended them — the strongest signal.
| # | Company | AI recommendation | Named by |
|---|---|---|---|
| 1 | Spring Home Heating & Cooling | Both engines | ChatGPT + Perplexity |
| 2 | Tropic Air Heating & Cooling | ChatGPT only | ChatGPT |
| 3 | Mr. Heating & Cooling Inc | ChatGPT only | ChatGPT |
| 4 | SuperGreen HVAC | ChatGPT only | ChatGPT |
| 5 | Eco Mechanical | ChatGPT only | ChatGPT |
| 6 | Icare Home Comfort Inc | ChatGPT only | ChatGPT |
| 7 | Brother 3 Corp | ChatGPT only | ChatGPT |
| 8 | Air Leaders Heating & Cooling | ChatGPT only | ChatGPT |
| 9 | Markham Heating & Air Conditioning | Perplexity only | Perplexity |
| 10 | Unionville Heating and Air Conditioning | Perplexity only | Perplexity |
AI recommendations change as the web changes. This is a snapshot from July 28, 2026, re-measured monthly — a company's position can rise or fall between updates.
How we measured this
Why isn't my business recommended by AI?
If your business isn't on the list above, there's a reason. Enter your website to get your free monthly AI Visibility Report — we run your business through the AI engines and show you exactly where you stand and who AI is recommending instead.
Questions
How is this ranking generated?
We ask AI answer engines the real questions Markham buyers ask about hvac companies, with live web search on, and record who each engine names. It's measurement, not opinion.
My business should be on this list — why isn't it?
If AI didn't name you, you're not yet in the answers buyers see. Run a free AI Visibility Report above to find out where you stand and which sources AI is citing instead.
How often is this updated?
Monthly. AI recommendations shift as the web changes, so we re-measure and re-publish this ranking every month.