Who does ChatGPT name for HVAC in Naperville, IL?

We wrote the six questions a buyer in Naperville, 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: Naperville, 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.

Air-Rite Heating & Cooling, Inc. (air-rite.com): named 11 times across ChatGPT, Gemini, Perplexity
Nortek Environmental, Inc. (nortekenvironmental.com): named 8 times across ChatGPT, Gemini, Perplexity
A-All Temp Heating and Cooling (aalltemp.com): named 7 times across ChatGPT, Gemini
Energy Services Air Conditioning and Heating Company (energyserv.com): named 5 times across ChatGPT, Gemini, Perplexity
Dutchman Heating and Cooling, Inc. (dutchmanheating.com): named 4 times across ChatGPT, Gemini, Perplexity
Harmonic Heating & Air Conditioning (harmonichvac.com): named 4 times across ChatGPT, Gemini, Perplexity
AccuMax HVAC (accumaxinc.com): named 2 times across ChatGPT, Perplexity
All Seasons Heating & Cooling (allseasons247.com): named 2 times across Perplexity

Directories and review sites the answers quoted: yelp.com, reddit.com, angi.com.

The six questions, answer by answer

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

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

ChatGPT named: Nortek Environmental (nortekenvironmental.com), Air-Rite Heating & Cooling (air-rite.com), Dutchman Heating & Cooling (dutchmanheating.com).
Gemini named: Precision Air Heating & Cooling, One Hour Heating & Air Conditioning of Naperville, A-All Temp Heating & Cooling, Nortek Environmental, Inc., U.S. Allied Plumbing, Heating, & Cooling.
Perplexity: no answer came back in time.

02Who can fix an air conditioner that runs but blows warm air in Naperville?

ChatGPT named: Nortek Environmental (nortekenvironmental.com), Four Suns Heating & Cooling (foursunsheatingandcooling.com), A-All Temp Heating & Cooling (aalltemp.com).
Gemini named: A-All Temp Heating & Cooling, McNally's Heating & Cooling, Harmonic HVAC, Four Seasons Heating, Air Conditioning, Plumbing, Sewer & Electric, TR Miller Heating, Cooling, and Plumbing.
Perplexity named: Air-Rite Heating & Cooling (air-rite.com), ABC Plumbing, Sewer, Heating, Cooling and Electric (4abc.com), Stephens Plumbing & Heating Inc (stephenspandh.com), Nortek Environmental (nortekenvironmental.com), Air Dynamics Heating & Cooling (airdynamicsil.com).

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

ChatGPT named: Energy Services Air Conditioning and Heating Company (energyserv.com), The Home Depot Installation Services (homedepot.com).
Gemini named: Air-Rite Heating & Cooling (air-rite.com), Harmonic HVAC, TR Miller Heating, Cooling & Plumbing (trmillerhvac.com), Dutchman Heating & Cooling, Inc. (dutchmanhvac.com).
Perplexity named: FortHouse Heating & Cooling (forthousehvac.com), Air-Rite Heating & Cooling (air-rite.com), Home Depot Services (Naperville) (homedepot.com).

04Who installs cold-climate heat pumps in Naperville, and can one handle local winters?

ChatGPT named: Harmonic Heating & Air Conditioning (harmonichvac.com), Chase Heating & Cooling (chasemechhvac.com).
Gemini named: A-All Temp Heating and Cooling, Brian & Sons, Nortek Environmental, Inc., Hall of Fame HVAC Co., Harmonic Heating & Air Conditioning.
Perplexity named: Harmonic Heating & Air Conditioning (harmonichvac.com), Energy Services Air Conditioning & Heating Co. (energyserv.com), OnCourse Heating, Cooling, Plumbing, Nortek Environmental, Inc. (nortekenvironmental.com), First Care Heating and Air LLC (firstcareheatingandair.com).

05Where can I get a furnace tune-up and safety inspection in Naperville before winter?

ChatGPT named: Air-Rite Heating & Cooling (air-rite.com), Energy Services Air Conditioning and Heating Company (energyserv.com), AccuMax (accumaxinc.com).
Gemini named: A-All Temp Heating & Cooling, TR Miller Heating, Cooling, Plumbing & Electrical, Harmonic Heating & Air Conditioning, McNally's Heating & Cooling, Energy Services Air Conditioning & Heating Company.
Perplexity named: AccuMax HVAC (accumaxinc.com), Air-Rite Heating & Cooling (air-rite.com), TR Miller Heating, Cooling & Plumbing (trmillerheatingandcooling.com), Nortek Environmental, Inc. (nortekenvironmental.com), All Seasons Heating & Cooling (allseasons247.com).

06Who installs whole-house humidifiers in Naperville to help with dry indoor air during winter?

ChatGPT named: Nortek Environmental (nortekenvironmental.com), Dutchman Heating & Cooling (dutchmanheating.com), A-All Temp Heating & Cooling (aalltemp.com).
Gemini named: All Seasons Heating & Cooling (allseasonsheatcool.com), Air-Rite Heating & Cooling (air-rite.com), Dutchman Heating & Cooling, Inc. (dutchmanheatingandcooling.com), A-All Temp Heating & Cooling (aalltemp.com), Hall of Fame HVAC Co. (hofhvac.com).
Perplexity named: Air-Rite Heating & Cooling, Dutchman Heating and Cooling, Inc., ComforTemp Heating & Air Conditioning, Energy Services Air Conditioning and Heating Company, All Seasons Heating & Cooling.

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