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Heating and furnace pros in Oconomowoc

Avatar for BB Heating and Cooling
BB Heating and Cooling
3001 East Koenig Avenue
New on HomeAdvisorNew on Angi
Approved Pro
BB Heating and Cooling
3001 East Koenig Avenue
New on AngiNew on HomeAdvisor
Approved Pro
9 years of experience
Free onsite estimate

BB heating Cooling, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with the right skill set and team for serving the greater Milwaukee and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!

BB heating Cooling, is committed to excellence in every aspect of our business. We uphold a standard of integrity bound by fairness, honesty and responsibility in all of our jobs. We are a locally owned and operated business with the right skill set and team for serving the greater Milwaukee and surrounding areas. There is no job too big, or too small for our team. Call today and let us put our experience to work for you!


Avatar for Guardian Heating and Cooling, LLC
Guardian Heating and Cooling, LLC
7815 South 6th Street
4.97(
62
)
Approved Pro
Guardian Heating and Cooling, LLC
7815 South 6th Street
4.97(
62
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
20 local quotes requested

At Guardian Heating and Cooling, LLC we offer a full range of heating and cooling installations, all under one roof. Including, Furnace, A/C, Boilers, Hydronic Systems, Snow Melt Driveways and Walkways. We offer you, our valued customers, expertise and genuine care. We value you as a customer and want to prove to you our skill, integrity, and compassion as a heating and cooling service provider. If you you’re operating an inefficient heating or cooling system that breaks down a lot, it’s likely that it’s going to break down again. Let us help you select the best Heating and Air Conditioning solution for your home. We are dedicated to getting the job done right at the lowest possible price. Best Regards, Guardian Heating and Cooling LLC

"He was very knowledgeable. Shared information on costs and explained process very clearly."

Mary K on May 2021

At Guardian Heating and Cooling, LLC we offer a full range of heating and cooling installations, all under one roof. Including, Furnace, A/C, Boilers, Hydronic Systems, Snow Melt Driveways and Walkways. We offer you, our valued customers, expertise and genuine care. We value you as a customer and want to prove to you our skill, integrity, and compassion as a heating and cooling service provider. If you you’re operating an inefficient heating or cooling system that breaks down a lot, it’s likely that it’s going to break down again. Let us help you select the best Heating and Air Conditioning solution for your home. We are dedicated to getting the job done right at the lowest possible price. Best Regards, Guardian Heating and Cooling LLC

"He was very knowledgeable. Shared information on costs and explained process very clearly."

Mary K on May 2021



Avatar for Vincent Plumbing & Heating
Vincent Plumbing & Heating
W304 S 3925 Brookhill Road
4.74(
354
)
Approved Pro
Vincent Plumbing & Heating
W304 S 3925 Brookhill Road
4.74(
354
)
Approved Pro
Super Service Award
Customers say: True professional
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
29 years of experience

Need hot water fast? Vincent Plumbing has been the trusted name in plumbing for over 30 years, providing top-quality water heater installation, repair, and maintenance for homeowners like you. ✔ Licensed, Insured & Bonded – Quality You Can Trust ✔ Expert Installation & Repairs for All Water Heater Brands ✔ Traditional & Tankless Water Heater Specialists ✔ Same-Day & Emergency Service Available ✔ Upfront Pricing – No Hidden Fees, No Surprises

"Professional and reasonable. A"

Jessica J on April 2025

Need hot water fast? Vincent Plumbing has been the trusted name in plumbing for over 30 years, providing top-quality water heater installation, repair, and maintenance for homeowners like you. ✔ Licensed, Insured & Bonded – Quality You Can Trust ✔ Expert Installation & Repairs for All Water Heater Brands ✔ Traditional & Tankless Water Heater Specialists ✔ Same-Day & Emergency Service Available ✔ Upfront Pricing – No Hidden Fees, No Surprises

"Professional and reasonable. A"

Jessica J on April 2025


Avatar for Southport Home Services
Southport Home Services
3304 Dairy Dr.
5.00(
5
)
Approved Pro
Southport Home Services
3304 Dairy Dr.
5.00(
5
)
Approved Pro
17 local quotes requested
20 years of experience

At Southport Home Services, 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 top 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.

At Southport Home Services, 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 top 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.


Avatar for Mamayek Heating & Cooling, Inc.
Mamayek Heating & Cooling, Inc.
378 Hunters Hill Trl
4.94(
36
)
Approved Pro
Mamayek Heating & Cooling, Inc.
378 Hunters Hill Trl
4.94(
36
)
Approved Pro
Customers say: Super punctual
Recommended by 97% of Angi customers
Recommended by 97% of HomeAdvisor customers
29 local quotes requested

Mamayek Heating & Cooling, Inc. isn't just a name on a truck. Bob Mamayek has been servicing heating and air conditioning clients in the Southeastern Wisconsin area for over three generations. When we are on the job, your family's comfort is in the very best hands, because we are dedicated to the highest standards of indoor air quality. We are not comfortable until you are comfortable, and that is why we are committed to providing you with quality service every visit. We are available 7 days a week, and our training and experience qualifies us to work on all brands of comfort equipment including; Luxaire, Weil-McLain, Carrier, Lennox, and more. We have complete respect for you and your home, and we are always easy to work with. That is what separates us from all other service companies. We are in business to earn your satisfaction 100% of the time.

"Mamayek did a nice job of installing new air conditioner at a good price. I would recommend this company to anyone!👍"

Larry H on May 2025

Mamayek Heating & Cooling, Inc. isn't just a name on a truck. Bob Mamayek has been servicing heating and air conditioning clients in the Southeastern Wisconsin area for over three generations. When we are on the job, your family's comfort is in the very best hands, because we are dedicated to the highest standards of indoor air quality. We are not comfortable until you are comfortable, and that is why we are committed to providing you with quality service every visit. We are available 7 days a week, and our training and experience qualifies us to work on all brands of comfort equipment including; Luxaire, Weil-McLain, Carrier, Lennox, and more. We have complete respect for you and your home, and we are always easy to work with. That is what separates us from all other service companies. We are in business to earn your satisfaction 100% of the time.

"Mamayek did a nice job of installing new air conditioner at a good price. I would recommend this company to anyone!👍"

Larry H on May 2025


Avatar for Mister Sparky of Brew City
Mister Sparky of Brew City
450 S Curtis Rd
4.80(
5
)
Approved Pro
Mister Sparky of Brew City
450 S Curtis Rd
4.80(
5
)
Approved Pro
Customers say: Quick response
59 local quotes requested
29 years of experience

At Mister Sparky, we know how much you depend on electricity to power your daily life. Luckily, we’re experts when it comes to safeguarding against its inherent dangers and are ready to do the reliable work needed to ensure your home’s electrical systems work for years to come. Our highly trained, licensed electricians are professional troubleshooters who hunt potential hazards and fix them before they cause serious damage. We show up on time, guaranteed, and deliver 100% satisfaction guaranteed with every service call. And because we’re locally operated, our electricians are familiar with the challenges you might face.

"Great experience "

Christopher G on June 2025

At Mister Sparky, we know how much you depend on electricity to power your daily life. Luckily, we’re experts when it comes to safeguarding against its inherent dangers and are ready to do the reliable work needed to ensure your home’s electrical systems work for years to come. Our highly trained, licensed electricians are professional troubleshooters who hunt potential hazards and fix them before they cause serious damage. We show up on time, guaranteed, and deliver 100% satisfaction guaranteed with every service call. And because we’re locally operated, our electricians are familiar with the challenges you might face.

"Great experience "

Christopher G on June 2025


Affordable Quality Heating & Air Conditioning, LLC
6813 Carnwood Road
5.00(
6
)
Approved Pro
Affordable Quality Heating & Air Conditioning, LLC
6813 Carnwood Road
5.00(
6
)
Approved Pro
Customers say: Quick response
Recommended by 100% of Angi customers
Recommended by 100% of HomeAdvisor customers
11 years of experience

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Professional, efficient, friendly, and thorough. Highly recommend Ben and Affordable Quality Heating and AC."

Mike S on October 2024

We pride our company on reliability, great communication, integrity, and quality work. We are experts in our trade and will do our best to keep you as educated as we can on your particular task or project. We look forward to earning your business! Book with us online or feel free to give us a call today!

"Professional, efficient, friendly, and thorough. Highly recommend Ben and Affordable Quality Heating and AC."

Mike S on October 2024


Avatar for Countryside Heating and Cooling, LLC
Countryside Heating and Cooling, LLC
W230N5000 Betker Drive Suite C
5.00(
5
)
Approved Pro
Countryside Heating and Cooling, LLC
W230N5000 Betker Drive Suite C
5.00(
5
)
Approved Pro
1 years of experience
Free onsite estimate

We are a small family owned business located in Pewaukee. Call us today for all of your heating, cooling, boiler, and hydronic heating needs. Licensed, insured, and accredited with the Better Business Bureau.

We are a small family owned business located in Pewaukee. Call us today for all of your heating, cooling, boiler, and hydronic heating needs. Licensed, insured, and accredited with the Better Business Bureau.


Avatar for JB Mechanical, LLC
JB Mechanical, LLC
119 West Water Street
4.88(
30
)
Approved Pro
JB Mechanical, LLC
119 West Water Street
4.88(
30
)
Approved Pro
Customers say: Quality work
Recommended by 96% of Angi customers
Recommended by 96% of HomeAdvisor customers
162 local quotes requested

JB Mechanical, LLC, is your premier choice for all of your HVAC needs in Beaver Dam, Wisconsin and surrounding areas. No project is too big or too small, so call today and let us put our experience to work for you!

"Prompt service, courteous technucians"

Sandra G on March 2023

JB Mechanical, LLC, is your premier choice for all of your HVAC needs in Beaver Dam, Wisconsin and surrounding areas. No project is too big or too small, so call today and let us put our experience to work for you!

"Prompt service, courteous technucians"

Sandra G on March 2023

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FAQs for heating and furnace service projects in Oconomowoc, WI

Consider replacing your gravity furnace when it's over 30 years old, when you experience frequent system failures, or when your heating bills continue rising despite maintenance. Many older gravity systems operate at substantially lower efficiency rates compared to modern alternatives, often 50% to 60% versus the 80% to 98% efficiency of contemporary furnaces. 

Replacement also makes sense when your existing system shows signs of deterioration that could affect safety or when professional inspection reveals significant issues.

Most gravity furnace replacements require between six and 12 hours of professional labor, spanning one to two working days, depending on scheduling and complexity. Basic installations with minimal complications may be completed in a single day, while projects requiring extensive ductwork modifications or asbestos remediation will require additional time. 

The timeline includes removal of the old system, preparation of the installation area, placement and connection of the new furnace, and thorough testing.

Watch for warning signs, including inconsistent heating throughout your home, unusual noises during operation, visible corrosion or damage to the heat exchanger, and steadily increasing energy consumption. If your furnace requires frequent repairs or if you notice a yellow or flickering pilot light instead of a steady blue flame, these may indicate serious issues. 

Age remains a primary consideration—systems over 30 years old warrant replacement rather than continued repair.

Well-maintained gravity furnaces that pass professional safety inspections can continue operating, but they inherently carry more risk factors than modern systems. Potential concerns include less efficient combustion that may produce carbon monoxide, deteriorating components that could create fire hazards, and the possible presence of asbestos in insulation materials. 

Modern furnaces incorporate numerous safety improvements, including automatic shutdown features, sealed combustion chambers, and electronic ignition systems that eliminate standing pilot lights.

The Oconomowoc, WI homeowners’ guide to heating and furnace services
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