Top 7 HVAC companies in Milwaukee, Wisconsin

How to choose

Public data supplies the only evidence here. A Bayesian adjustment pulls every raw star rating toward the national mean of 4.764 until review counts grow large enough to stand alone. Small additional credits apply for a public website, HVAC-focused listing category, and published 24/7 availability. The resulting shortlist therefore favors firms whose scores remain stable after adjustment.

The shortlist

This is a shortlist built from public listing data, not a review of work performed.

GURU NANAK HEATING AND COOLING

GURU NANAK HEATING AND COOLING lists five reviews at a raw 5.0 that the model adjusts downward to 4.818. The firm operates from 4551 S 23rd St Apt 5, Milwaukee, WI 53221 and can be reached at (414) 377-1511. Its general-contractor category plus published 24/7 availability supplied the tie-breaker that placed it first. With only five reviews the adjustment still moves the score 0.182 points below the raw figure because small samples receive stronger pull toward the mean. These numbers reveal nothing about actual workmanship or response times on site.

Milwaukee Heating & Cooling

Milwaukee Heating & Cooling holds eight reviews at a raw 5.0 adjusted to 4.814. The address is 5023 W Fond du Lac Ave, Milwaukee, WI 53216 and the phone is (414) 356-1073. The listing shows a general-contractor category without 24/7 claims, so placement rests solely on the adjusted rating. Eight reviews still produce a 0.186-point downward correction from the raw score. The figures give no indication of parts availability or technician training.

Navarro’s HVAC Supply

Navarro’s HVAC Supply appears with one review at a raw 5.0 adjusted to 4.812. It is located at 1126 W Lincoln Ave, Milwaukee, WI 53215 and answers at (414) 334-0321. A public website supplied the only extra signal. One review triggers the largest downward adjustment in the list, moving the score 0.188 points below raw. The single data point supplies no information on service consistency.

Mack's Heating & Air Conditioning

Mack's Heating & Air Conditioning records two reviews at a raw 5.0 adjusted to 4.799. The address is 2491 W Fond du Lac Ave, Milwaukee, WI 53206 and the number is (414) 448-6615. General-contractor status and 24/7 availability added tie-breaker weight. Two reviews produce a 0.201-point downward shift. The count remains too low to reveal seasonal performance patterns.

Stonehaus Mechanical

Stonehaus Mechanical shows eight reviews at a raw 4.5 adjusted upward to 4.768. It operates from 3073 S Chase Ave Ste 502, Milwaukee, WI 53207 and can be called at (414) 377-9636. Website presence and 24/7 listing both contributed. The 4.5 raw rating sits below the national mean, so the model lifts the score 0.268 points. Eight reviews still leave substantial uncertainty about long-term reliability.

Milwaukee Heating & Air Conditioning Systems

Milwaukee Heating & Air Conditioning Systems lists eleven reviews at a raw 4.5 adjusted to 4.693. The address is 425 W State St, Milwaukee, WI 53208 and the phone is (414) 360-6047. No extra signals appear. Eleven reviews move the score 0.071 points below the raw value because the count is still modest. The data cannot address whether the firm maintains adequate winter stock.

Guardian Heating and Cooling

Guardian Heating and Cooling records ten reviews at a raw 4.2 adjusted to 4.683. It is based at 11360 W Theo Trecker Way, West Allis, WI 53214 and reachable at (262) 573-8883. Website and 24/7 availability supplied tie-breakers. The 4.2 raw rating lies well below the mean, producing a 0.483-point upward correction. Ten reviews remain too few to confirm consistent performance across heating seasons.

Cost

Installed full-system costs center on $9,800 with a recorded range of $8,800 to $10,800. Separate 2025 invoiced data shows an average of $8,763 and an upper quartile of $12,450. Labor is listed at $110 per hour. Permit fees fall between $100 and $350. The two cost sources agree closely enough that no reconciliation is required.

Licensing and permits

The Wisconsin Department of Safety and Professional Services registers HVAC Contractor and HVAC Qualifier credentials at state level. No statewide insurance mandate is published. Permits for one- and two-family dwellings fall under the uniform dwelling code and are issued by the municipality or its designated inspection agency. Homeowners must verify current registration and local permit rules directly with the issuing jurisdiction.

Incentives

Wisconsin Home Energy Rebates through Focus on Energy remain active, offering up to $8,000 for qualifying heat pumps plus utility incentives of $500 to $2,000. Participation requires Trade Ally status; the network supplies training records and quality-assurance inspections. No state tax credit exists. Federal 25C and 25D credits expired at the end of 2025, leaving only the commercial 48E incentive. Homeowners should therefore limit conversations to Trade Ally contractors.

Climate

Milwaukee sits in IECC zone 6A with 6,900 heating degree days and only 700 cooling degree days. Winter design temperature reaches -2 °F while summer design temperature is 88 °F. Winters are very dry, so humidification is common. The load is strongly heating-dominant with peak service demand in winter. Equipment must be sized for extended cold operation; short, intense cooling loads in July and August require careful capacity matching to avoid short-cycling.