Waseit

Waseit study · UK · collected 2026-07-31

Which gas engineers do AI assistants recommend in Cardiff?

We asked ChatGPT, Gemini and Perplexity 6 real buying questions about gas engineers in Cardiff - the way customers actually ask. Every answer named specific businesses: 26 names came back for this trade in this city.

The names the assistants cite most

  • 1.Why they are recommendedcited 2 times · by gemini
  • 2.Sharland Gascited 2 times · by perplexity
  • 3.TS Heating and Bathroomscited 2 times · by perplexity
  • 4.Cosywarmcited 2 times · by perplexity
  • 5.Apex Heating & Plumbingcited 2 times · by perplexity
  • 6.D'Jay Plumbing & Heatingcited 2 times · by perplexity
  • 7.PH Bluecited 2 times · by perplexity
  • 8.Local Recommendationscited 1 time · by openai

Counts are citations across our sampled answers for this trade and city, collected 2026-07-31 via the assistants' APIs. Answers vary between runs - across the whole study, assistants agreed with each other on only 3% of names. A snapshot, honestly labelled, not a permanent ranking.

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Gas engineers in other cities

Other trades in Cardiff

Full dataset and method: the 2026 UK study (1464 answers, 244 trade×city cells) · our methodology