Johnson Mechanical, LLC
Is this your business?
Verify your details, earn a verified badge, and start getting customer inquiries. Takes about a minute by phone.
Claim This Business FreeClaiming is free. Featured placement is optional, $99/mo.
About Johnson Mechanical, LLC
Johnson Mechanical, LLC is a heating and cooling contractor in Portage, Wisconsin with a 4.7-star rating across 206 reviews. The business operates Monday through Friday from 7 AM to 4:30 PM and provides residential and commercial HVAC services within roughly 45 miles of Portage, extending into Wisconsin Dells and Baraboo. As an A+ rated BBB accredited business, the company handles furnace and air conditioning installations, repairs, and ongoing maintenance for homeowners and business owners throughout south-central Wisconsin.
This contractor differentiates through several tangible advantages: they offer around-the-clock emergency service, partner with American Standard for equipment purchases, and provide financing through Wells Fargo. Their expertise extends to healthy air systems designed to improve indoor air quality, and they install smart thermostats compatible with home automation platforms. These specific capabilities address real homeowner concerns about system reliability, upfront costs, and year-round comfort control.
Customer reviews describe specific positive experiences with Johnson Mechanical. Anita Carter mentioned Bob and his crew installing central air in a tri-level home with existing radiator heat, completing the project quickly with minimal disruption. Kayla Summerville recounted sending a message Thursday evening about a furnace failure during arctic temperatures and receiving Technician assistance by Friday morning. Steve Kiliahighlighted that his new furnace installation included a smart thermostat connected to Alexa, allowing temperature control through voice commands.
What Customers Say
Five-star ratings dominate the feedback, with multiple reviewers praising same-day emergency response times and thorough explanations of repair options. Customers consistently note polite, professional technicians who resolve issues without recommending unnecessary part replacements, saving money on service costs.
Working Hours
| Sunday | Closed |
| Monday | 7 AM–4:30 PM |
| Tuesday | 7 AM–4:30 PM |
| Wednesday | 7 AM–4:30 PM |
| Thursday | 7 AM–4:30 PM |
| Friday | 7 AM–4:30 PM |
| SaturdayToday | Closed |
Services
Furnace Installation & Repair
High-efficiency furnace installation and component-level repair services for homes with existing radiator heat or forced-air systems.
Air Conditioning Services
Cooling system installation, maintenance, and repair to combat humidity during Portage summers.
Emergency HVAC Service
Round-the-clock emergency response for heating or cooling failures, regardless of time or day.
Smart Thermostat Installation
Home automation-compatible thermostats linked to smartphones and voice assistants for remote temperature control.
Healthy Air Systems
Indoor air quality solutions designed to reduce bacteria and improve breathing air throughout the home.
Commercial HVAC
Heating and cooling services for business properties, not limited to residential installations.