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Name: Mark's Heating & Cooling, Inc.
Telephone: (262) 567-6829

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Mark's Heating & Cooling, Inc.

"Whatever It Takes"

About Us

Mark's Heating specializes in providing Bryant Heating and Cooling Systems for Oconomowoc, the Lake Country area, and beyond. With over 40 years of experience in Southeastern Wisconsin, we are proud to be NATE Certified. Whether you need a new furnace or air conditioner, service on your current system, or preventative maintenance to enhance your home's efficiency, we have you covered. We offer complete sales, service, and installation with an extensive line of Bryant products. For more information, please visit our website: http://www.marksheat.com

Areas Served

Waukesha County, WI | Oconomowoc, WI | Lake Country, WI

Our Professional Associations

North American Technician Excellence
Better Business Bureau

Our Certifications

NATE Certified

What We Offer

Our Specialties include:

Residential and Commercial
New Home Construction
Remodels
Boiler Installation and Repair
Humidifiers
In-Floor Heating
Air Conditioning

Our Services include:

Air Conditioner
Furnaces and Repair
Boilers and Installation
We Sell Bryant Brand Products

Our Brands include:

Bryant

Our Products include:

Dehumidifiers
Ventilators
UV Lamps
Evaporate Coils
Humidifiers
Light Commercial
Heat Pumps
Gas Furnaces
Packaged Products
Fan Coils
Ductless Systems
Air Conditioners
Air Purifiers
Boilers
CO Alarms
Controls and Thermostats
VRF Indoor and Outdoor Units, Controls and Accessories

Testimonials

On 8/26/2025 thomas farmer had this to say:
Our boiler was not working properly and much of our house was not being heated. Mark came out and diagnosed the problem quickly and was able to replace the faulty part, all at a reasonable price. I highly recommend him and his crew.

On 2/17/2025 Josh Starkey had this to say:
I only have good things to say about this company. Good customer service, fast response time and quality repairs. Will be a repeat customer. Thanks

On 1/20/2025 Nancy D had this to say:
Mark was immediately responsive, professional and efficient. It was such a cold morning and of course also a Monday. Highly recommend for HVAC needs!! Testimonial written by Nancy D on this site.

On 2/1/2024 Gar Aschenbrener had this to say:
Prompt and takes time to explain the repair. 5 Star service.

On 1/20/2024 Tim O had this to say:
Very professional and responsive to my service call for furnace problem. Highly recommend

Contact Us

Mark's Heating & Cooling, Inc.
355 W. Wisconsin Ave. Oconomowoc, WI 53066
Phone: (262) 567-6829
Mobile: (262) 719-7309
Fax: (262) 567-8220
Email: marksheat@yahoo.com

1/2 Mile West of Intersection of 67 and Wisconsin Avenue. Right Across from City Beach

Where To Find Us

Payment Types Accepted

Visa, MasterCard, American Express, Personal Checks, Cash

Our Hours

Holiday Hours May Vary. Please Call For Details.

Monday: 7:00 AM - 7:00 PM
Tuesday: 7:00 AM - 7:00 PM
Wednesday: 7:00 AM - 7:00 PM
Thursday: 7:00 AM - 7:00 PM
Friday: 7:00 AM - 7:00 PM

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