HVAC in Detroit, MI: how do you get written quotes?

For HVAC work in Detroit, describe your existing heat source, the problem and whether the work involves repair or replacement. Detroit City Airport climate normals distinguish heating from cooling demand. Use those questions to request a home-specific scope, with equipment, ductwork, venting and permit responsibilities separated before comparing bids.

InstaBids is an AI-run marketplace for homeowners and property managers: describe a home job once, by chat or through your own AI assistant, add photos, and get multiple written quotes on the same scope, compared apples to apples, with no phone calls or home visits before you pick.

By InstaBids editorial team with AI research agents. Sources read: 17 October 2026 Latest source read: 5 November 2026 Updated 2026-11-05

Describe it onceBy chat, or through your own AI assistant, and add photos.
Post it and send itContractors bid in writing on that scope.
Compare line by lineEvery quote is written against the same scope.
You chooseContact details stay hidden until you pick and they confirm.

For your AI assistant

MCP connector · REST API · plain HTML

Hand any of these to your assistant and it can help you write this job's request; you send the request yourself. What you type in the job box above goes into the prompt these buttons carry. The connector asks you to sign in to your InstaBids account the first time.

MCP connector URLhttps://instabids.ai/api/agent/mcp
Agent API (OpenAPI)https://instabids.ai/openapi.json
Start-request linkhttps://instabids.ai/intake?trade=ac&from=hire-hvac--mi--detroit&utm_source=us&utm_medium=page&utm_campaign=hire&page_type=hire&place=detroit%2C+MI#job=heating%20or%20air-conditioning%20job
Prompt for any AI, with your job

Open it in your assistant

Add InstaBids as a connector

Every page is plain HTML. Steps for every assistant: add to your assistant.

Key facts for hiring an HVAC contractor in Detroit

In Detroit city, utility gas heats an estimated 80.5% of occupied housing units, with a 90% margin of error of ±0.6 percentage points (ACS 2020–2024). That city estimate does not identify the system in your home. American Community Survey: House Heating Fuel; read 2026-10-17.

How do you get written quotes on one scope?

Separate cooling diagnosis from replacement, and ask whether the scope changes the ducts. NOAA's 1991–2020 normals at Detroit City Airport report 854.0 annual cooling degree days, base 65°F. For a replacement proposal, ask for a home-specific cooling load calculation; station climate data do not size your equipment. U.S. Climate Normals: Detroit City Airport; read 2026-10-17.

Describe the job once, using the scope checklist below, built from what we found for Detroit.
Post it on InstaBids and send it.
Every quote is written against the same scope, so they compare line by line.
You choose who gets your number.
Your AI assistant can help you write it: InstaBids works as a connector in Claude and in any MCP client, added by URL with your InstaBids sign-in, and a ChatGPT app is coming. You send the request yourself. Connect an assistant

What should a written HVAC scope in Detroit list?

Describe the existing heat source and any proposed change. Ask the scope to separate equipment, fuel piping, venting, electrical connections and duct changes where they apply.

Ask who handles the mechanical application and how that responsibility is represented in the written scope.

For a proposed replacement, ask for the heating and cooling load calculations and the equipment capacities they support.

The equipment: capacity, efficiency rating and model, in writing
The heating side too: Detroit's heating degree days mean the system heats as well as cools
Gas line and venting checks if the system burns gas, as many of Detroit's homes do
Whether the general rule Detroit's page quoted below sets out applies to your job, and who applies for the permit if it does
Removal and disposal of the old parts or materials
Warranty terms on parts and labor, in writing

Do you need a permit for a heating or air-conditioning job in Detroit?

Detroit's permit page “Buildings Safety Engineering and Environmental Department Frequently Asked Questions” (read 5 November 2026): “Yes, an inspection must be requested after the work is completed and a Certificate of Acceptance (C of A) obtained to validate your permit.” Open Detroit's source page

Detroit's permit page (read 5 November 2026): “After submitting your application, you can expect to get your permit in about 1 day.” Open Detroit's source page

What license does an HVAC contractor need in Detroit?

Verbatim from Michigan's mechanical examination page: Must take and pass an examination for each work classification desired. Mechanical Examination, Licensing/Registration & Application Information; read 2026-11-05.

After you pick an HVAC contractor in Detroit, you can open the Bureau of Construction Codes record search. Select a search type and enter the contractor information there. Accela Citizen Access; read 2026-11-05.

Michigan license lookup guide

Furnace repair in Detroit

For a furnace problem, describe what the system does and ask the scope to distinguish diagnosis, parts and replacement. Detroit City Airport's 1991–2020 normals report 6,105.8 annual heating degree days, base 65°F. Use this as climate context when discussing a replacement's heating load; it does not diagnose a fault in your furnace. U.S. Climate Normals: Detroit City Airport; read 2026-10-17.

Ask which heat source the quoted equipment will use.

NOAA explains: “The degree day is one measure of the weather related energy demand.” Ask for equipment sized to that climate.

Median hourly wage for Heating, Air Conditioning, and Refrigeration Mechanics and Installers in the Detroit-Warren-Dearborn, MI area, May 2025: $30.37 (U.S. Bureau of Labor Statistics, Occupational Employment and Wage Statistics).

This is what workers in this occupation are paid per hour. It is not what a contractor charges for a job.

How does InstaBids work?

InstaBids does not hold payment for the work; you pay the contractor directly on the terms of the bid you accepted.

How is InstaBids different?

Each bidder appears under a stable label such as Contractor A, so you judge the work, not the brand.

Contact details stay hidden until the homeowner picks a contractor and they confirm the connection.

The contact-detail filter can miss disguised contact details.

Sources for the facts on this page

Detroit permit page “Buildings Safety Engineering and Environmental Department Frequently Asked Questions”, read 5 November 2026: detroitmi.gov
Detroit permit page, read 5 November 2026: detroitmi.gov
michigan.gov, read 5 November 2026: www.michigan.gov
BLS Occupational Employment and Wage Statistics (series OEUM001982000000049902108), May 2025, read 17 October 2026: api.bls.gov
NOAA NCEI U.S. Climate Normals 1991-2020, read 17 October 2026: www.ncei.noaa.gov
U.S. Census Bureau, American Community Survey 5-year (B25040), ACS 5-year 2020-2024, read 17 October 2026: api.census.gov
NOAA CPC degree-day definition, read 3 November 2026: www.cpc.ncep.noaa.gov

This product uses the Census Bureau Data API but is not endorsed or certified by the Census Bureau.