← All 58 businesses in the Chicago HVAC Index
of 58 in Chicago HVAC
August 2026 edition
Deljo Heating & Cooling
deljoheating.com · free scorecard, published for every business in the market — asked or not
Email me if this shop moves
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Confirm by email (double opt-in). We’ll tell you when this shop's stamp changes, or when AI starts naming it. Scorecard stays on the page. No alert blast this week. Payment never touches the grade.
Free move list: email when this shop's stamp changes. Watch ($149/mo) is the monthly readout beside it — different product. Payment never touches the grade.
Receipt
“Deljo Heating, Cooling & Plumbing — 4.9/5, ~3,440 reviews. A long-established Chicago option with a huge review base and 24/7 availability. One caveat: independent Checkbook data shows some complaints about price and service, so I'd get a written quote.”
ChatGPT · PILOT-02-chatgpt-r1 · Aug 11, 2026
Which HVAC companies in Chicago do people trust most?
Every answer that named this business (10)
Each item is a real customer-style question, the exact sentence a model returned, and which assistant said it. Published battery only.
Which HVAC companies in Chicago do people trust most?
“Deljo Heating, Cooling & Plumbing — 4.9/5, ~3,440 reviews. A long-established Chicago option with a huge review base and 24/7 availability. One caveat: independent Checkbook data shows some complaints about price and service, so I'd get a written quote.”
ChatGPT · PILOT-02-chatgpt-r1 · Aug 11, 2026
24/7 emergency furnace repair in Chicago
“Deljo Heating, Cooling & Plumbing — 4.9★, 3,440 reviews — (773) 657-9989. Listed open 24/7 and handles emergency no-heat/furnace repairs.”
ChatGPT · PILOT-17-chatgpt-r1 · Aug 11, 2026
Schedule an HVAC maintenance visit in Lincoln Park for under $150
“| Deljo Heating, Cooling & Plumbing | Local Lincoln Park HVAC seasonal maintenance and safety checks | Request quote to match budget | Call (773) 829-4295 |”
Gemini · PILOT-16-gemini-r1 · Aug 12, 2026
24/7 emergency furnace repair in Chicago
“Deljo Heating & Cooling — Phone: (773) 829-4295 [Deljo Heating & Cooling]; Services: Around-the-clock emergency diagnostics and repairs for furnaces and heat pumps. [Deljo Heating & Cooling]”
Gemini · PILOT-17-gemini-r1 · Aug 12, 2026
24/7 emergency furnace repair in Evanston
“Deljo Heating & Cooling — Phone: 773-829-4295 [Deljo Heating & Cooling]; Details: Over a century of experience servicing the Chicagoland area with 24/7 emergency HVAC technicians ready for dispatch. [Deljo Heating & Cooling]”
Gemini · PILOT-19-gemini-r1 · Aug 12, 2026
Which HVAC companies in Chicago do people trust most?
“Deljo Heating & Cooling | 4.9/5 from 110 Carrier-hosted customer reviews; Chicago location on W. Bryn Mawr. | Carrier systems and established local service”
Perplexity · PILOT-02-perplexity-r1 · Aug 11, 2026
Which HVAC companies in Evanston do people trust most?
“For Evanston, Illinois, the strongest local-trust candidates appear to be Flader Plumbing & Heating, Deljo Heating & Cooling, and Hero Air—but "most trusted" depends on whether you prioritize a truly local shop, volume of reviews, or emergency availability.”
Perplexity · PILOT-04-perplexity-r1 · Aug 11, 2026
Are the big HVAC chains in Evanston better than independent shops?
“Some well-known Evanston-area providers marketed as larger firms include Four Seasons, Deljo, Hero Air, and other companies serving the broader Chicago/North Shore area. A local industry listing gives those firms strong reported ratings and availability, but because that information is promotional, treat it as a starting point—not proof that one is best for your house. [fourseasonsheatingcooling]”
Perplexity · PILOT-09-perplexity-r1 · Aug 12, 2026
Which Lincoln Park HVAC company has the best reviews for installations?
“Other notable options: Cruz Air LLC — family-owned Chicago HVAC contractor, 5.0 stars from 54 reviews, serves Lincoln Park and surrounding neighborhoods. Deljo Heating & Cooling — repairs, installations, maintenance with 24/7 emergency service in Lincoln Park.”
Perplexity · PILOT-12-perplexity-r1 · Aug 12, 2026
24/7 emergency furnace repair in Chicago
“Deljo Heating & Cooling — 773-829-4295 — 24/7 emergency HVAC service throughout Chicagoland.”
Perplexity · PILOT-17-perplexity-r1 · Aug 12, 2026
Models
Can AI read their site?
Probe stability: 0 signals disagreed between the two passes.
What to fix
- Publish a real
/llms.txtthat summarizes the business for AI agents. - State an explicit AI crawler policy in
robots.txtfor GPTBot, ClaudeBot, Google-Extended and PerplexityBot. - Optional: publish a verified MCP card at
/.well-known/mcp.jsonif agents should transact directly.
History
This history starts here. August 2026 is the baseline — every future edition stacks on top of it, and a dated record like this cannot be created after the fact.
Watch this business
Watch this business
Monthly readout; scorecard stays free
$149 / month
Free move list: email when this shop's stamp changes. Watch ($149/mo) is the monthly readout beside it — different product. Payment never touches the grade.
- Told when a model starts or stops naming them
- Machine-readability changes re-checked each edition
- Payment never touches the grade
$149 a month against a four-figure job. If one readout helps you win back a single job a year — or hold one you were about to lose to a shop the assistants like better — it has paid for itself. The scorecard stays free either way.
This scorecard is free and it is not for sale. We do not sell the fix, and no payment moves this number — not from this business, not from whoever markets it. Send corrections with evidence to watch@lodestarindex.com.
Where to next
See where this business sits against all 58 competitors.
Watching a book of clients against an independent number.
The battery, the probe, and the reliability gate.