Home / Chicago HVAC / Preferred Comfort Heating & Cooling

pilot · Chicago HVAC · September 2026 edition

Preferred Comfort Heating & Cooling

3 of 3 facts verified against a public register, as of 2026-09-03. On the record: verified against public sources and dated. We don't approve the booking. Unnamed in 60 probe answers from ChatGPT, Gemini and Perplexity this edition — an input, not a finding.

Verified facts

Real business

Verified

2026-09-03 → 2026-12-02 · source

PREFERRED COMFORT HEATING & COOLING, INC. — Regulated Business License, license number 2578833, term license_id 3063756, status AAI, issued 2026-02-17, expires 2028-02-15, City of Chicago business register

At that address

Verified

2026-09-03 → 2026-12-02 · source

3828 N WHIPPLE ST, Chicago, IL 60618 — registered address on the current licence term (term license_id 3063756), City of Chicago business register

Licensed

Verified

2026-09-03 → 2026-12-02 · source

Regulated Business License, license number 2578833, term license_id 3063756, status AAI, business activity "Home Repair Services (Home Based Business)"

Verified facts carry the date we checked, the date they expire, and the public source. A missing check is coverage, not a finding about the business.

Use your stamp

This seal is live. Wherever it is placed, it reads the record each time it is shown, says exactly what this receipt says, and links back to this page. When the record changes, the seal changes with it. Nobody can buy it and it costs nothing: it is the same instrument for every business on the record.

Today it reads VERIFIED · CHECKED 2026-09-03 · 3 OF 3 FACTS VERIFIED.

<a href="https://lodestarstamp.com/companies/pcheatingandcooling-com.html"><img src="https://lodestarstamp.com/v1/seal?domain=pcheatingandcooling.com" width="160" height="160" alt="Lodestar Stamp: Verified: 3 of 3 facts verified against a public register, checked 2026-09-03."></a>

Open the image

For a dark background add &ink=dark; for a larger file add &size=480. The alt text is generated from the receipt, so a screen reader hears the same fact. Machine-readable receipt data: /index.json and this page.

What assistants named this edition

Probe battery input, never a score. The same questions, the same edition, who was named.

ChatGPT · never Gemini · never Perplexity · never

Who the assistants named instead (5 questions)

When a customer asked these questions, the assistants answered with other businesses. Published battery questions only; this shows who was mentioned, not who is better.

Q: Which HVAC companies in Chicago do people trust most?

Named instead: All Temp Heating & Air Conditioning, Chicago HVAC Repair Doctor, City & Suburban Heating & Cooling, Deljo Heating & Cooling and others

Q: Which HVAC companies in Evanston do people trust most?

Named instead: Guardian Heating & Cooling Service, American Vintage Home, All Temp Heating & Air Conditioning, Besco Air Inc. and others

Q: Get me three quotes for a new AC unit in Chicago

Named instead: City & Suburban Heating & Cooling, Oasis Plumbing, Heating & Cooling, Chicago HVAC Repair Doctor, Four Seasons Heating, Air Conditioning, Plumbing & Electric and others

Q: 24/7 emergency furnace repair in Chicago

Named instead: Chicago HVAC Repair Doctor, Deljo Heating & Cooling, ABC Plumbing, Sewer, Heating, Cooling & Electric, Eco Temp HVAC and others

Q: Who is the best HVAC company in Chicago?

Named instead: All Temp Heating & Air Conditioning, Oasis Plumbing, Heating & Cooling, Four Seasons Heating, Air Conditioning, Plumbing & Electric, All Temp Heating & Cooling (Wauconda) and others

Can machines read their site?

AI crawler policyWhat robots.txt says about AI crawlers.

standard

llms.txtA plain-language file agents can read before guessing.

yes

SitemapA machine-readable map of important URLs.

yes

Structured dataLocalBusiness JSON-LD or equivalent structured business facts.

Agent endpointVerified JSON only; never an advertisement for tools.

none

Probed twice. 0 signals disagreed between the two passes.

Probe notes this edition

State an explicit AI crawler policy in robots.txt for GPTBot, ClaudeBot, Google-Extended and PerplexityBot.
Add schema.org LocalBusiness JSON-LD so machines can read hours, service area and contact details.
Optional: publish a verified agent card at /.well-known/mcp.json so assistants can transact with you directly.

Follow this business

Free change alert

One email when this receipt changes: a verified fact moves, expires, or is added. Mentions from the probe battery ride along as an input. Double opt-in, nothing else.

Prefer a prefilled email?

Watching · one business · First month free, then $149/month

What a subscriber gets

For this business. The receipt stays free.

First month free

New Watching subscriptions include a 30-day free trial; the card on file is charged $149 on day 31 unless canceled.

Then $149/month · USD · automatically renews until canceled. 14-day refund on the first paid invoice. Cancel future renewals by email.

Watching starts when your card is on file and the free month begins. The first briefing may go out before any charge.
Monthly readout for your selected business covering the previous month
Change alert when a change is published on your Lodestar receipt
Weekly digest for your selected business covering the previous week
Payment never touches the record

Watch this record — first month free, then $149/month See every email a subscriber gets

Own this business? Select this business for Watching

Watching starts when your card is on file and the free month begins. The first briefing may go out before any charge. A subscriber gets the baseline briefing, the monthly readout, the change alert for published changes, and the weekly digest for the selected business. The public receipt and seal remain free.

This receipt is free and it is not for sale. We do not sell the fix, and no payment moves this record, not from this business and not from whoever markets it. Send corrections with evidence to watch@lodestarstamp.com. Clocks and filed records: /corrections.html.

Where to next

Chicago HVAC record

See this business among every other in the market.

For agencies

Watching a book of clients against an independent record.

How it works

The battery, the probe, and the reliability gate.