Who does ChatGPT name for HVAC in Joliet, IL?

We wrote the six questions a buyer in Joliet, IL would type into an AI assistant when they need HVAC work, asked each one on ChatGPT, Gemini, Perplexity with live web search, and wrote down every business the answers named. No opinions, no ranking of ours: this is what the assistants said on 2026-09-09.

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Trade: HVAC
Area: Joliet, IL
Questions: 6 asked, 6 answered
Engines: ChatGPT, Gemini, Perplexity
Date: 2026-09-09

Who came up most

Every business the answers named, counted across the six questions and the engines.

Comfort First Heating and Cooling (comfortfirstheatingandcooling.com): named 8 times across ChatGPT, Gemini, Perplexity
PDM Plumbing, Heating & Cooling Since 1885 (pdmsince1885.com): named 8 times across ChatGPT, Gemini, Perplexity
TR Miller Heating, Cooling, Plumbing & Electrical (trmillerheatingandcooling.com): named 7 times across ChatGPT, Gemini, Perplexity
Johansen & Anderson Inc (J&A) (jnaonline.com): named 6 times across ChatGPT, Perplexity
Air Systems Heating and Cooling (airsystemsheatingandcooling.com): named 4 times across ChatGPT, Gemini
ComfortMax Heating and Cooling (comfortmax.org): named 4 times across Gemini, Perplexity
Magtek Mechanical Heating & Cooling (magtekmechanical.com): named 4 times across Gemini, Perplexity
Gene May Heating & Cooling (genemayheating.com): named 3 times across Gemini, Perplexity

Directories and review sites the answers quoted: thumbtack.com, yelp.com, expertise.com.

The six questions, answer by answer

The question a buyer would type, then what each assistant named.

01Who offers emergency furnace repair in Joliet, IL, if my heat stops working overnight?

ChatGPT named: Air Systems Heating and Cooling (airsystemsheatingandcooling.com), PDM Plumbing, Heating & Cooling (pdmsince1885.com), Comfort First Heating and Cooling (comfortfirstheatingandcooling.com).
Gemini named: PDM Plumbing, Heating & Cooling, Black Diamond Plumbing & Mechanical, Polar Heating & Air Conditioning, Potocki Heating & Air Conditioning, AirMaxx Heating and Air Conditioning.
Perplexity named: Magtek Mechanical Heating & Cooling (magtekmechanical.com), PDM (pdmsince1885.com), Always Ready Repair (alwaysreadyrepair.com), Lockwood Furnace Company (lockwoodfurnace.net), Potocki Heating & Air Conditioning (potockiheatingandair.com).

02Who can fix an air conditioner that's blowing warm air in Joliet?

ChatGPT named: Johansen & Anderson Inc. (jnaonline.com), PDM Plumbing, Heating & Cooling (pdmsince1885.com).
Gemini named: ComfortMax Heating & Cooling, Omega Plumbing Heating & Cooling, TR Miller Heating, Cooling, Plumbing & Electrical, Allegiance Heating & Cooling, Air Systems Heating and Cooling.
Perplexity named: ComfortMax Heating & Cooling (comfortmax.org), Service 1 Plumbing, Heating & AC (service1heating.com), Omega Plumbing Heating & Cooling (omegaplumbing.com), Joliet Heating & Cooling (jolietheatingcooling.com), Lockwood Furnace Company (lockwoodfurnace.net).

03How much does it cost to replace a gas furnace and central air conditioner in Joliet, IL?

ChatGPT named: Lockwood Furnace Company (lockwoodfurnace.net), Johansen & Anderson (jnaonline.com).
Gemini named: The Home Depot, Honest HVAC Services, EZ Air Inc..
Perplexity: no answer came back in time.

04Who installs cold-climate heat pumps in Joliet, and would one work well for my home?

ChatGPT named: TR Miller Heating, Cooling, Plumbing & Electrical (trmillerheatingandcooling.com), Assured Energy Solutions (assuredenergyllc.com).
Gemini named: ComfortMax Heating and Cooling, Wind Crest Heating & Cooling, Palmetto Solar, Comfort First Heating and Cooling, CoolZone HVACR.
Perplexity named: Solar Power Midwest (solarpowermidwest.com), Comfort First Heating and Cooling (comfortfirstheatingandcooling.com), Johansen & Anderson Inc. (jnaonline.com), A-All Temp Heating & Cooling (aalltemp.com), TR Miller Heating, Cooling, Plumbing & Electrical (trmillerheatingandcooling.com).

05Where can I book a furnace tune-up and carbon monoxide safety check in Joliet before winter?

ChatGPT named: TR Miller Heating, Cooling, Plumbing & Electrical (trmillerheatingandcooling.com), Service 1 Plumbing, Heating & AC (service1heating.com), Comfort First Heating and Cooling (comfortfirstheatingandcooling.com).
Gemini named: Comfort First Heating and Cooling, Gene May Heating & Cooling, PDM (pdmhvac.com), Potocki Heating & Air Conditioning (potocki.com), Air Systems Heating and Cooling.
Perplexity named: TR Miller Heating, Cooling, Plumbing & Electrical, Comfort First Heating and Cooling, Gene May Heating & Cooling, Johansen & Anderson Inc..

06Who can inspect and repair ductwork in Joliet to fix uneven heating between upstairs and downstairs?

ChatGPT named: Johansen & Anderson (jnaonline.com), Comfort First Heating and Cooling (comfortfirstheatingandcooling.com), HVAC ZILLA (hvaczilla.com).
Gemini named: PDM Plumbing, Heating & Cooling, Comfort First Heating and Cooling, Magtek Mechanical Heating & Cooling, Air Systems Heating and Cooling, Air Duct Cleaning & Repairs Joliet.
Perplexity named: Johansen & Anderson Inc (J&A) (jnaonline.com), PDM Plumbing, Heating & Cooling Since 1885 (pdmsince1885.com), TR Miller Heating, Cooling, Plumbing & Electrical (trmillerheatingandcooling.com), Eco Temp HVAC (ecotemphvac.com), Magtek Mechanical Heating & Cooling (magtekmechanical.com).

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