Business Details
Emergency
services
Your Trusted HVAC Partner in Portage, WI
Johnson Mechanical has been the professional choice for comprehensive HVAC solutions since our founding. With over four decades of combined experience, our team delivers prompt and professional heating, cooling, and air quality services to residential and commercial clients within a 45-mile radius of Portage, Wisconsin. As an A+ rated BBB business, we prioritize customer satisfaction through 24/7 emergency services, transparent communication, and expert installation of American Standard products.Our commitment to quality extends to home automation systems, cold storage solutions, and energy-efficient upgrades tailored to Wisconsin's climate. Led by industry veterans Robert Marquardt and Vernon Carlson, we combine technical expertise with personalized service to ensure optimal comfort and system reliability for every client.
Services
HVAC Installation
HVAC Repair
Healthy Air Systems
Home Automation
Cold Storage Solutions
Furnace Maintenance
Air Conditioning Services
System Upgrades
Emergency Repairs
Commercial HVAC
Highlights and features
- We offer 40+ years of combined HVAC industry experience
- Our team provides 24/7 emergency service availability
- We maintain an A+ rating with the Better Business Bureau
- We offer Wells Fargo financing options for HVAC systems
- We specialize in American Standard heating and cooling products
Associations and certifications
- Better Business Bureau (BBB)
What people say
Prompt professional service
Knowledgeable technicians
Fair pricing
24/7 emergency availability
Quality installations
Services
HVAC Installation
We provide expert installation of heating, ventilation, and air conditioning systems for residential and commercial properties. Our technicians specialize in American Standard products, ensuring energy efficiency and long-term reliability. Every installation includes comprehensive system testing and customer education on operation and maintenance.
Emergency Repairs
Our emergency repair service addresses urgent HVAC issues at any time of day or night. With rapid response times and experienced technicians, we resolve system failures that compromise comfort or business operations. This service includes diagnostics, component replacement, and system restoration to ensure immediate functionality.
Healthy Air Systems
We install and maintain air purification systems that remove contaminants and improve indoor air quality. Our Aprilaire Healthy Air Solutions reduce allergens, control humidity, and prevent airborne pathogens. These systems benefit homes and businesses by creating healthier environments for occupants through advanced filtration and ventilation technology.
Home Automation
Our home automation solutions integrate smart thermostats and control systems with existing HVAC equipment. These systems enable remote temperature management, energy usage monitoring, and automated climate adjustments. We provide installation and programming services that enhance comfort while reducing energy costs through optimized system performance.
Cold Storage Solutions
We service commercial refrigeration systems that maintain critical temperature controls for businesses. Our expertise covers walk-in coolers, freezers, and specialized storage units. We offer repair, maintenance, and installation services that prevent food spoilage, protect inventory, and ensure compliance with health regulations through reliable temperature management systems.
People
Robert Marquardt
Owner
Graduate of University of Wisconsin Platteville with HVAC design license since 1997. Specialized in industrial and healthcare projects before co-founding Johnson Mechanical in 2015. Brings 30+ years of technical expertise and customer-focused approach to residential and commercial HVAC solutions.
Vernon Carlson
Owner
HVAC technician with 20+ years of field experience at Johnson Mechanical before becoming co-owner in 2015. Combines hands-on technical knowledge with client relationship focus. Prioritizes quality installations and thorough customer education about system operations and maintenance.
Questions
Do you offer emergency HVAC services?
Yes, we provide 24/7 emergency HVAC repair services for urgent heating and cooling system failures.
Are financing options available for new systems?
Yes, we offer Wells Fargo financing options to help customers afford necessary HVAC replacements.
What areas do you serve?
We serve Portage, Wisconsin Dells, Baraboo, and surrounding areas within a 45-mile radius.
Do you install smart thermostat systems?
Yes, we specialize in home automation technology including smart thermostat installations and programming.
What brands do you work with?
We primarily install American Standard heating and cooling products and Aprilaire air quality systems.
Are maintenance plans available?
Yes, we offer maintenance services to keep HVAC systems operating efficiently year-round.
Reviews (5)
John Loy
Jun 19, 2022
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Johnson mechanical was excellent! They bill for 1 hour minimum. The tech, who was awesome, finished his job in pretty short time. He gave us the rest hour by answering questions and looking at other HVAC issues in our home. He made great recommendations and was super friendly. They gave us our full hour and we couldn't be happier with the service. Johnson mechanical will be our go-to for any future HVAC needs. Thanks again guys. Y'all are great!
Treazure Kotlowski
Jun 07, 2022
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Professional, great communication, friendly & fantastic service. No cuts into HVAC ducts! The tech cleaned both ways through each vent, then vacuumed out & sanitized and replaced filter. Great piece of mind moving into our new home. Service: A/C system maintenance
Luke Barden
May 29, 2022
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Would recommend them to anyone looking for a reliable heating and cooling company. Our ac went out last summer and they came the same day to check it out, we decided to have a new central air unit installed and they came the next day and installed it. Great customer service and anytime we have called they get here right away and fix the problem. Very professional, reliable and they do great work.
Mav Hovey
May 18, 2022
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Highly recommend using Johnson Mechanical for any HVAC work! They spent the time to understand my project and work to quickly get a solution made. They showed up on time as scheduled and completed the job. Services: Repair HVAC, Heating equipment repair & installation, Installation
Aj Breger
May 11, 2022
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Fantastic experience! Had an A/C unit installed and they were professional and courteous from the very beginning. Bidding was painless and accurate, install was prompt and went smoothly. Services: A/C system maintenance, Installation
