theSierraIndex
UPDATED 2026-10-05
SI
INDEX
Answer Share · HVAC contractors

Detroit, MI

Share of responses, across 4 AI models and 4 question types, in which each company is named when a user asks for advice on hvac contractors services in this market (138 responses measured).
Market concentration
73.9%
Concentration — the share of responses naming one of the top 3 companies shown below.
Answer Share by company
Company Share of responses Answer Share Citation Share
National Heating & Cooling
53.6% 1.5%
Mechanical Heating, Cooling & Electrical
41.3% 0.1%
Manning Mechanical
34.1% 0.7%
Arista Air Conditioning & Heating:
27.5% n/d
Anytime Heating & Cooling
27.5% n/d
Andy's Statewide Heating and Air Conditioning
22.5% n/d
Randazzo Heating & Cooling
21.7% 0.8%
LC Heating, LA Air Conditioning, and Air Dept
17.4% n/d
Oasis Heating and Cooling
14.5% n/d
Dynamic HVAC
13.8% 2.5%
A & E Heating & Cooling Company
11.6% n/d
Family Heating & Cooling
11.6% n/d
How we collected the data and how to read it

How we collected this data

Every week, the same frozen set of 4 question phrasings is sent to OpenAI, Anthropic, Google Gemini, and Perplexity — through each provider’s official API, with active web search, never through a consumer chat interface.

Same market, same questions, repeated on a fixed schedule — not a single sample. No AI model is paid or influenced; this page reports what each one already says.

How to read the numbers

Answer Share — the share of measured responses that name a given company. 55.6% means the company appeared in 55.6% of the responses collected for this market.

Market concentration — the share of responses naming at least one of the top 3 companies: how fragmented or concentrated the answers are for this market.

Citation Share — the share of citations linking directly to a company’s own website, among companies whose domain we’ve matched. Shown as n/d where we haven’t matched a domain, or 0% where the domain is known but never cited directly — AI models often cite a review aggregator instead of the company’s own site.

The date at the top of this page is when this market was last measured. Numbers refresh weekly.

Methodology: 4 AI models (OpenAI, Anthropic, Google Gemini, Perplexity), 4 question phrasings per measurement, data collected via official APIs with active web search. No payment influences this ranking. Read the full methodology →