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TRUSTED BY OCONOMOWOC, WI HOMEOWNERS

  • Average homeowner rating star icon4.7
    Average homeowner rating
  • Verified reviews icon323
    Verified heating and air conditioning services reviews

Top-Rated Heating and air conditioning pros in Oconomowoc - Updated Nov 2026

Avatar for Droegkamp Furnace Co
Droegkamp Furnace Co
4.8(
575
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Repair+27 more

Serving Oconomowoc, WI and surrounding areas

Approved

In business since 1877

Free estimates

Emergency services offered

"Two visits and that's not our fault: Brian came, diagnosed the problem (capacitor if not blower died, and tune up). He was right: a new capacitor made it work well, until the old blower just refused to obey. Two days later we called and said that Brian was right: the blower needed replacement. Doing just the capacitor was our call to try to save money. Now our 20+ year old furnace runs like new. And I'll be calling them to replace our HVAC ('cuz it's 20+ years old) when it decides to give up the ghost."
Response time1 day
Response rate99%
15 neighbors recently requested a quote
Cardinal Heating & Air Conditioning
4.8(
165
)
Air Ducts & Vents - CleanDucts & Vents - Install or ReplaceCentral A/C - Install+9 more

Serving Oconomowoc, WI and surrounding areas

Approved

In business since 1984

Free estimates

Credit card accepted

Cardinal Heating, Cooling, Plumbing & Electric has provided full-service HVAC, plumbing, and electrical work to homes and businesses throughout the Madison area since 1984. Homeowners call us for furnace and air conditioner repair, water heater replacement, drain cleaning, and electrical panel upgrades, along with the everyday plumbing and electrical work every home needs. We take the time to listen to every customer and explain the options clearly, and our licensed technicians bring years of hands-on experience to routine maintenance, unexpected repairs, and full system installations alike. Call Cardinal today to schedule your free estimate.

Cardinal Heating & Air
Cardinal Heating & Air
Cardinal Heating & Air
Cardinal Heating & Air
Cardinal Heating & Air

+15

14 neighbors recently requested a quote
Recommended by91%of homeowners
Avatar for Southport Plumbing, Heating & Cooling
Southport Plumbing, Heating & Cooling
5.0(
14
)
Central A/C - InstallGas Furnace / Forced Air Heating System - InstallDuctless Mini-split A/C - Install or Replace+7 more

Serving Oconomowoc, WI and surrounding areas

Approved

In business since 2005

Free estimates

Warranties offered

At Southport Plumbing, Heating & Cooling we're A+ rated by the BBB. Our technicians are NATE certified to meet national standards of excellence, and we're a Carrier® Factory Authorized Dealer, recently cited as the #1 medium-sized business to work for by the Milwaukee Journal Sentinel. We treat our team well and hold them to high professional standards. Our up front, transparent pricing, great customer service, and honesty in our business practices make us the plumbing and HVAC company that you'll feel good working with on a regular basis, with 100% satisfaction guaranteed.

Air Conditioner
Furnace System
Outdoor Heat Pump
Garage Heat Pump
Furnace Install

+2

19 neighbors recently requested a quote
Avatar for Guardian Heating and Cooling, LLC
Guardian Heating and Cooling, LLC
4.7(
82
)
Gas Boiler or Radiator Heating System - InstallRadiant Floor Heating System - InstallGas Boiler or Radiator Heating System - Install - For Business+2 more

Serving Oconomowoc, WI and surrounding areas

Approved

In business since 1998

Free estimates

Warranties offered

"Professional, polite and friendly, Steve offered the best deal in town on a a new furnace. He answered all my questions regarding the work before installation. The work was scheduled and completed on time and Steve stayed until he answered all remaining questions I had regarding my new furnace. I heartily recommend his HVAC services to other members!"
Boilers
Boilers
Boilers
Garage infloor
Sun Room

+4

Response time7 hrs
13 neighbors recently requested a quote
Recommended by100%of homeowners
Avatar for Due North Heating & Cooling, LLC
Due North Heating & Cooling, LLC
5.0(
15
)
Gas Furnace / Forced Air Heating System - InstallGas Furnace / Forced Air Heating System - Install - For Business

Serving Oconomowoc, WI and surrounding areas

Approved

In business since 2020

Free estimates

Emergency services offered

"Quick personal response to my initial request. All other vendors responded with generic email, or automated call/voicemail. Josh was to the point, yet personable. He arrived with Kevin and took care of my situation in a fast and professional manner. Felt very comfortable during the entire process! Do your self a favor and call Josh for all your HVAC ne"
Furnace Replacement
Furnace Replacement
Furnace Replacement
Due North Heating & Cooling LLC
Due North

+1

Response time3 hrs
Recommended by100%of homeowners
Avatar for Napravnik Construction, LLC
Napravnik Construction, LLC
4.8(
66
)
Thermostat - Install or Replace

Serving Oconomowoc, WI and surrounding areas

Approved

Super Service Award Winner

In business since 1998

Free estimates

Emergency services offered

Here, at Napravnik Construction, LLC, we have expanded our business service area from the Chicago Western Suburbs North to Milwaukee metro area and pride ourselves with reliability, great communication, integrity, and quality work. We strongly believe in giving our absolute best in all of our projects no matter how big or small. We are experts in our trade and will always keep you educated on your particular task or project. We look forward to earning your business!

French Kitchen
Custom Homes
Room Additions
Modern flare
Custom Garages

+4

Response time1 day
50 neighbors recently requested a quote
Recommended by85%of homeowners
Avatar for Over the Moon Heating, Air & Electric
Over the Moon Heating, Air & Electric
3.6(
15
)
Air Ducts & Vents - CleanCentral A/C - InstallDucts & Vents - Install or Replace+5 more

Serving Oconomowoc, WI and surrounding areas

Approved

In business since 2009

Emergency services offered

Warranties offered

Over the Moon Heating, Cooling & Electrical exists for one reason — our customers. Our mission is to educate homeowners on the safety, comfort, and efficiency of their homes while delivering dependable electrical and HVAC solutions you can trust. We specialize in the repair, installation, and design of residential heating, air conditioning, and electrical systems. All work is performed safely and in compliance with state and local codes. We are fully insured and registered with the State of Wisconsin, and our licensed, background-checked technicians arrive prepared in fully stocked service vehicles to provide efficient, professional service. Our team is committed to clear communication, honest recommendations, and quality workmanship, helping homeowners make confident and informed decisions about their home systems.

Team & Job Photos
Team & Job Photos
Team & Job Photos
Team & Job Photos
Team & Job Photos

+51

Response time4 hrs
86 neighbors recently requested a quote
Recommended by54%of homeowners
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Heating and Air Conditioning FAQs, answered by experts

You should only run your dehumidifier in warmer months, such as spring and summer, to get the best performance out of your system. The air gets drier when temperatures drop in the winter months, creating less of a need for a dehumidifier. However, when to run a dehumidifier will depend on your local climate.

To find a reputable HVAC company, start by researching providers in your area. Look for companies with mostly positive online reviews and check the Better Business Bureau’s website for customer complaints. Next, verify their credentials. Rule out any companies that aren’t licensed, as this is a requirement in some states and municipalities, and confirm they are insured. Once you have a shortlist, contact each professional to ask key questions: How many years of experience do you have? Do you hold any third-party certifications? Do you have experience working on my specific type of HVAC system or brand? Can you provide references? What is your per-hour pricing? Do you offer maintenance contracts for ongoing savings? Do you provide a warranty for your work?

Because of the improved efficiency, ACs with higher SEER ratings tend to cool down your home better than models with a lower SEER. Higher-SEER AC units have a higher cooling capacity and a lower energy demand, meaning they may help cool your space faster without running up the electricity bill.

Yes, you can clean AC coils yourself. Just make sure that the power to your AC system is off before you begin. You’ll need some basic tools and supplies, including a soft brush, cloth, screwdriver, and a commercial or homemade cleaning solution. Cleaning your coils will only cost about $10.

No. Evaporator coils are designed to work with specific refrigerant types, and they are rated by what kinds of refrigerant they use. It’s indicated with an “R” code. It’s important to match your evaporator coil and refrigerant or your system will not work properly. An AC technician can tell you what type of refrigerant your system needs and what evaporator coils will work with it.

The Oconomowoc, WI homeowners’ guide to heating and air conditioning services

From average costs to expert advice, get all the answers you need to get your job done.