What AI recommends when buyers ask about hvac & plumbing services
20 brand-free buyer questions, each asked to 5 AI assistants with Phoenix, Arizona as the sample city. 131 providers were named across 100 answers. Every number below traces back to an original answer.
The hvac & plumbing services AI assistants name most often
Counted per answer: a provider named twice in one answer counts once. "Recommended" means the answer explicitly told the buyer to pick it.
| # | Provider | Answers | Share | Recommended | ChatGPT | Perplexity | Gemini | Claude | Grok |
|---|---|---|---|---|---|---|---|---|---|
| 1 | Parker & Sons | 12 | 12% | 6 | 2 | 3 | 3 | 2 | 2 |
| 2 | Lennox | 8 | 8% | 1 | — | — | 1 | 4 | 3 |
| 3 | Trane | 8 | 8% | 1 | — | — | 1 | 4 | 3 |
| 4 | Carrier | 7 | 7% | 1 | — | — | 1 | 3 | 3 |
| 5 | The Aussie Plumber | 6 | 6% | 2 | — | 2 | 1 | 2 | 1 |
| 6 | Day & Night Air Conditioning, Heating, & Plumbing | 5 | 5% | 4 | — | 1 | 3 | — | 1 |
| 7 | George Brazil Plumbing & Electrical | 5 | 5% | 1 | 1 | 2 | 1 | — | 1 |
| 8 | Howard Air & Plumbing | 5 | 5% | 1 | 1 | 1 | 3 | — | — |
| 9 | Wyman Plumbing & Mechanical LLC | 5 | 5% | 1 | 1 | 1 | 2 | 1 | — |
| 10 | Cactus Water Works | 4 | 4% | 4 | 1 | 1 | — | 1 | 1 |
| 11 | American home water & air | 4 | 4% | 2 | — | 1 | 3 | — | — |
| 12 | Chas Roberts | 4 | 4% | 1 | 1 | 1 | 1 | 1 | — |
Each assistant answers differently
| Model | Answers | Name ≥1 provider | Providers / answer | With citations | Citations / answer | Points to directories |
|---|---|---|---|---|---|---|
| ChatGPT openai/gpt-5-mini | 20 / 20 | 45% | 2.45 | 100% | 8.65 | 10% |
| Perplexity sonar | 20 / 20 | 25% | 1.65 | 100% | 18.35 | 10% |
| Gemini google/gemini-3.5-flash | 20 / 20 | 70% | 3.55 | 100% | 5.55 | 5% |
| Claude anthropic/claude-haiku-4-5 | 20 / 20 | 45% | 1.9 | 95% | 6.25 | 5% |
| Grok xai/grok-4.20-non-reasoning | 20 / 20 | 60% | 2.7 | 100% | 10 | 15% |
What buyers ask AI about hvac & plumbing services
Generated without any brand name so the assistants had to name providers on their own. "Providers" is the number of distinct names across all models for that question.
Purchase
| Question | Providers | Named by most models |
|---|---|---|
| Who are the best HVAC companies in Phoenix that offer emergency service on weekends? | 24 | Chas Roberts (4) · Wolfgang's Cooling, Heating & Plumbing (4) · Goettl (3) |
| Can you recommend a highly-rated plumbing service in downtown Phoenix that specializes in older homes? | 11 | Cactus Water Works (4) · Felix Plumbing (2) · Ancla Plumbing (1) |
| Which plumbing companies near Phoenix are known for fair pricing and honest diagnostics? | 20 | Hometown Plumbing Pros (4) · AZ Family Plumbing (2) · DeGeorge Plumbing & HVAC (2) |
| I need a new water heater installed this week. Can you suggest top-rated plumbers in Phoenix that can do it quickly? | 24 | George Brazil Plumbing & Electrical (3) · Water Heaters Only (3) · Express Plumbing AZ (2) |
| What are the most reliable HVAC and plumbing service providers I should contact for bids in the Phoenix area? | 28 | Parker & Sons (5) · Day & Night Air Conditioning, Heating & Plumbing (3) · Howard Air & Plumbing (3) |
Comparison
| Question | Providers | Named by most models |
|---|---|---|
| I need to upgrade my bathroom plumbing before a home inspection. Which type of pipes should I use, and what's the average cost? | 0 | none named |
| What's the difference between a standard AC unit and a high-efficiency model, and is it worth the extra cost in Phoenix? | 7 | APS (2) · SRP (2) · American Home Water & Air (1) |
| Should I get a smart thermostat installed with my new AC system, and what are the benefits? | 2 | Ecobee (1) · Nest (1) |
Research
| Question | Providers | Named by most models |
|---|---|---|
| What should I look for when choosing between different types of air conditioning systems for my Phoenix home? | 12 | Carrier (2) · Lennox (2) · Trane (2) |
| How much should I expect to pay for a new furnace installation in Phoenix, and what factors affect the price? | 13 | Carrier (2) · Goodman (2) · Lennox (2) |
| I'm getting quotes from three different companies for an AC replacement in Phoenix. What questions should I ask each of them? | 9 | A/C & Plumbing Doctors (1) · American Home Water & Air (1) · Cooper Climate Control (1) |
| What maintenance should I do on my HVAC system in Phoenix to avoid expensive repairs? | 13 | Apex Desert Climate Care (1) · AZ Perfect Comfort (1) · AZ Trade Masters (1) |
Evaluation
| Question | Providers | Named by most models |
|---|---|---|
| My water heater is making strange noises and I'm worried it might fail soon. How do I know if I need to replace it or if it can be repaired? | 4 | ARS / Rescue Rooter (1) · Bradford White (1) · Michael & Son (1) |
| I have a leaky faucet that's been dripping for weeks. Is this something I should get fixed right away or can it wait? | 0 | none named |
| My toilet keeps running and my water bill is getting expensive. Should I replace it or repair it? | 0 | none named |
| My AC unit is 15 years old and seems to be cooling less efficiently. Is it better to repair or replace it? | 3 | Energy Star (1) · Lennox (1) · Trane (1) |
| I've noticed low water pressure in my Phoenix home. Is this a sign of a serious plumbing problem that needs professional help? | 8 | Local Roots AC & Plumbing (2) · 2 Sons Plumbing (1) · American Home Water (1) |
Trust
| Question | Providers | Named by most models |
|---|---|---|
| What are red flags I should watch out for when hiring a plumber in my area? | 0 | none named |
| How can I verify that an HVAC technician is properly licensed and insured in Arizona? | 1 | Fiscor HVAC (1) |
| Are there warranties or guarantees I should expect when hiring someone for a major HVAC installation? | 5 | Carrier (3) · Lennox (3) · Trane (3) |
Sources AI cites for hvac & plumbing services questions
976 citations from 462 domains. Only sources marked inside the answer text are counted; the retrieval pool is not.
- Other sites72%
- Named providers' own sites18%
- Directories & review sites4%
- Communities (Reddit, Quora…)4%
- Research, government & universities2%
- Video0%
- News & media0%
| Domain | Type | Citations | Questions | ChatGPT | Perplexity | Gemini | Claude | Grok |
|---|---|---|---|---|---|---|---|---|
| reddit.com | Communities (Reddit, Quora…) | 37 | 18 | — | 29 | 3 | 1 | 4 |
| angi.com | Directories & review sites | 20 | 8 | 2 | 10 | 2 | 4 | 2 |
| consumeraffairs.com | Other sites | 16 | 8 | 2 | 6 | 1 | 3 | 4 |
| parkerandsons.com | Other sites | 12 | 7 | 2 | 3 | 3 | 2 | 2 |
| serviceagent.ai | Other sites | 12 | 5 | 2 | 4 | 4 | 1 | 1 |
| roc.az.gov | Research, government & universities | 11 | 2 | 4 | 3 | 1 | 1 | 2 |
| theacdoctors.com | Other sites | 11 | 5 | 1 | 4 | 3 | 1 | 2 |
| azcharged.com | Other sites | 10 | 3 | 2 | 2 | 2 | 2 | 2 |
| hvacprojectcost.com | Other sites | 10 | 5 | 3 | 1 | 1 | 2 | 3 |
| rotorooter.com | Named providers' own sites | 10 | 6 | 1 | 7 | 1 | — | 1 |
| azcomfortexperts.com | Other sites | 9 | 3 | 1 | 4 | 1 | 1 | 2 |
| trane.com | Named providers' own sites | 9 | 6 | 2 | 4 | 1 | 2 | — |
GEO takeaways for hvac & plumbing services
- 49% of 100 answers named at least one specific provider; 131 distinct names came up across 20 questions.
- No single provider dominates: the most-named one, Parker & Sons, appears in only 12% of answers (named by 5 of 5 models). The category is still open — consistent evidence on the sources below can move a brand into these answers.
- Of 976 citations, 18% pointed to named providers' own sites, 4% pointed to directories & review sites, 4% pointed to communities (reddit, quora…). Those source types are what the models actually read before answering, so that is where the evidence has to live.
- Gemini names the most providers per answer (3.55), Perplexity the fewest (1.65). Share of voice is engine-specific; one number across models hides this.
- Local questions only produced named providers when a place was given, so the recommendation questions here use Phoenix, Arizona as the sample city. Results for another city will differ.
Questions teams ask before they start
Which hvac & plumbing services does ChatGPT recommend?
In 20 answers collected on 2026-09-07, ChatGPT named Parker & Sons (2), DeGeorge Plumbing & HVAC (2), Local Roots AC & Plumbing (2), George Brazil Plumbing & Electrical (1), Howard Air & Plumbing (1) most often for Phoenix, Arizona. Names change between runs; this is a dated snapshot, not a ranking.
Which hvac & plumbing services does Perplexity recommend?
In 20 answers collected on 2026-09-07, Perplexity named Parker & Sons (3), The Aussie Plumber (2), George Brazil Plumbing & Electrical (2), Day & Night Air Conditioning, Heating, & Plumbing (1), Howard Air & Plumbing (1) most often for Phoenix, Arizona. Names change between runs; this is a dated snapshot, not a ranking.
Which hvac & plumbing services does Gemini recommend?
In 20 answers collected on 2026-09-07, Gemini named Parker & Sons (3), Day & Night Air Conditioning, Heating, & Plumbing (3), Howard Air & Plumbing (3), American home water & air (3), Wyman Plumbing & Mechanical LLC (2) most often for Phoenix, Arizona. Names change between runs; this is a dated snapshot, not a ranking.
Which sources do AI assistants cite when answering hvac & plumbing services questions?
Across 976 citations from 462 domains: Other sites 72%, Named providers' own sites 18%, Directories & review sites 4%. The most-cited domains were reddit.com, angi.com, consumeraffairs.com, parkerandsons.com, serviceagent.ai. Only sources marked inside the answer text are counted, never the retrieval pool.
How were these numbers produced?
20 brand-free buyer questions were generated for the HVAC & plumbing services category in the United States market, then each was asked to ChatGPT, Perplexity, Gemini, Claude, Grok on 2026-09-07 (100 of 100 answers completed). A separate parser extracted every provider each answer named; directories and review sites are recorded separately and never counted as providers. Failed answers are excluded from every percentage rather than treated as zero.
How can a hvac & plumbing service business get recommended by AI?
Start from the questions above: for each one your business should be an answer to, check whether the sources the models cite (directories, review sites, communities, media) describe you with the facts the question needs. Then measure the same questions for your own brand — InsightWonder runs this exact loop per site, with citations traced to URLs, and turns missed questions into content and placements.
How this page was built
- Market: United States; sample city for local questions: Phoenix, Arizona.
- Collected 2026-09-07. Models: ChatGPT (openai/gpt-5-mini), Perplexity (sonar), Gemini (google/gemini-3.5-flash), Claude (anthropic/claude-haiku-4-5), Grok (xai/grok-4.20-non-reasoning).
- 100 of 100 question × model answers completed.
- Providers are extracted by a separate parser from the full answer text; directories, marketplaces and review sites are recorded as "points to directories" and never counted as providers. AI answers change between runs, so this is a dated snapshot.
- Same method as the product's visibility engine, run for the whole category instead of one brand. Log in to run it for yours: https://app.insightwonder.com
Other industries: Dentists · Electric bikes · Furniture brands · Gyms & fitness studios · Hotels · Law firms · Pet supplies · Project management software · Real estate agents · Restaurants · Skincare brands
Turn AI visibility into a repeatable growth system.
Create a project, confirm your market and start measuring the questions that matter.