Top 7 HVAC companies in Washtenaw, Michigan

Washtenaw County sits in a heating-dominant climate with 6,400 heating degree days against only 700 cooling degree days. Winter design temperature reaches 5 °F while summer peaks at 89 °F under humid conditions. Equipment must therefore handle long heating seasons and occasional deep cold snaps. Natural gas remains the dominant fuel, yet cold-climate heat pumps with backup are rated fair to good. Proper sizing matters because oversized units short-cycle in shoulder seasons and fail to dehumidify in summer.

Climate in Washtenaw County

Washtenaw County falls in IECC zone 5A. The long heating season and lake-effect moisture place heavy demands on furnaces, boilers and heat pumps. Systems must maintain capacity at 5 °F outdoor temperature while managing humidity during 89 °F summer peaks. High central-air saturation already exists, yet peak service calls arrive in winter. Contractors therefore need experience with cold-climate heat-pump sizing and auxiliary heat staging.

The shortlist

This shortlist is built from public listing data, not a review of work performed. Companies are ranked by a Bayesian-adjusted rating that pulls each star rating toward the national mean of 4.764 until the firm has enough reviews to stand on its own. Small tie-breakers favor a public website, HVAC-specialist listing and published 24/7 availability.

Altech Mechanical Service

Altech Mechanical Service operates from 7885 Jackson Rd Ste 4, Ann Arbor, MI 48103 as a general contractor and lists a public website. Its 15 reviews produced a raw 5.0 that the Bayesian model adjusted downward to 4.883, still above the 4.764 mean because the review count is moderate. The firm can be reached at (734) 669-6100. These figures do not reveal whether the company maintains inventory for same-day parts or how many technicians it fields during peak winter weeks.

My Bryant Dealer

My Bryant Dealer lists 24/7 availability and a public website from 2440 S Industrial Hwy Ste A, Ann Arbor, MI 48104. One review at 5.0 received a larger downward Bayesian adjustment to 4.832. Call (734) 436-3682. The single review supplies little information on how the firm performs on complex retrofits or multi-day installations.

Peyeramid Contracting LLC

Peyeramid Contracting LLC shows one review at 5.0 from 455 E Eisenhower Pkwy Ste 300, Ann Arbor, MI 48108 and maintains a public website. The Bayesian adjustment lowered the score to 4.812. Reach the firm at (313) 810-2570. Limited review volume leaves open questions about consistency across different equipment brands.

Sears Heating and Air Conditioning

Sears Heating and Air Conditioning appears at 101 E Huron St, Ann Arbor, MI 48104 with one review at 5.0 and a public website. Its adjusted score sits at 4.812 after the mean pull. The contact number is (734) 256-7647. A single data point cannot indicate typical lead times or callback rates after installation.

Heating & Cooling Inc

Heating & Cooling Inc is listed at 4659 Freedom Dr, Ann Arbor, MI 48108 as a general contractor with one review at 5.0. The adjusted score equals 4.772. No phone number appears in the listing. The absence of both a website and a published number limits any inference about response speed or service capacity.

Johnstone Supply

Johnstone Supply recorded 21 reviews at a raw 4.4 from 2460 S Industrial Hwy, Ann Arbor, MI 48104 and maintains a public website. The Bayesian model raised the score to 4.654 because the rating sat below the national mean. Call (734) 995-3500. Wholesale-oriented listings do not disclose whether the firm performs residential service calls or only supplies parts.

Dunrite Inc.

Dunrite Inc. shows 10 reviews at a raw 4.2 from 2245 S State St Ste 1200 f, Ann Arbor, MI 48104 and publishes 24/7 availability. The Bayesian adjustment lifted the score to 4.643. The number is (734) 753-5070. Ten reviews still leave room for variability in larger commercial or light-commercial projects.

How to choose an HVAC contractor

Compare raw star ratings against the number of reviews that support them. Ask each firm whether it holds current Michigan mechanical contractor registration through LARA and whether it participates in the Michigan Saves authorized-contractor network. Request references from recent furnace or heat-pump installations performed in zone 5A conditions.

Cost of HVAC work

Installed costs for a full system in Washtenaw County range from $8,800 to $10,800 according to one data set. A second source reports a 2025 average of $10,300 with the upper quartile reaching $14,249. Labor is billed at $110 per hour and permit fees run $100 to $400. The two cost sources agree closely, indicating stable local pricing.

Licensing and permits

Michigan mechanical contractor licensing is administered statewide by the Department of Licensing and Regulatory Affairs (LARA) — Bureau of Construction Codes, Mechanical Division. Classifications cover HVAC Equipment, hydronic systems, ductwork, refrigeration and limited or unlimited service. No state surety bond is required for mechanical contractors. Permits are issued by the local enforcing agency rather than the state. Homeowners may perform work on their own single-family dwelling without a license but must still obtain a permit.

Incentives available in 2026

Michigan Home Energy Rebates through EGLE remain limited. Heat-pump rebates reach $8,000. No state tax credit exists. Utility programs from DTE Energy and Consumers Energy offer $150 to $1,300. Michigan Saves financing requires an authorized contractor. Federal 25C and 25D credits expired at the end of 2025. Only commercial or third-party-owned systems may access the 48E investment tax credit. Homeowners should therefore prioritize contractors already inside the Michigan Saves network when seeking rebates or financing.