Oostburg, Wisconsin · Locally-owned since 2008
An Oostburg, Wisconsin HVAC company, locally-owned and operated like a family.
Two owners, a crew of NATE-certified technicians, and a shop on Michigan Avenue. We heat and cool houses in Sheboygan County and along the lakeshore, and we would rather explain the work than sell you on it.
- Carrier Factory Authorized Dealer
- 8-time Carrier President's Award winner
- NATE-certified technicians
- Locally-owned since 2008
The short version
How we work
Six things you can hold us to
Every contractor says they are honest. These are the specific, checkable things that honesty turns into on a job site.
We measure the incoming line voltage
Before we put new equipment in, we check what the house is actually being fed. Line voltage in parts of this county sits near the top of the legal ANSI range, and modern inverter-driven furnaces, heat pumps and mini-splits are far less tolerant of that than the equipment they replace. It shows up later as control boards that keep dying. Most contractors never take the reading. It takes us a few minutes and it has changed what we recommended more than once.
We size off the house, not off the old unit
The furnace that is in your basement now may well have been oversized when it went in. Matching its number is how that mistake gets handed down. We work out what the house needs, then pick equipment for that.
You see the price before the work starts
We diagnose, we write the number down, you decide. No invoice ever arrives with something on it you have not already agreed to.
We tell you when not to spend the money
If a repair makes more sense than a replacement, we say so, even though the replacement is the bigger ticket. Talking somebody into the wrong system costs us the next twenty years of their business.
We install two lines and service everything else
Carrier for ducted heating and cooling, Mitsubishi for ductless and mini-splits. That is deliberate: two lines we know cold beats eight we know a little. You do not have to own either one for us to work on your system.
One year, in writing
Our work carries a 100% satisfaction guarantee for a year. Ask for the written terms when we quote. We would rather you read them than take our word for it.
We do heating, cooling, ventilation and indoor air quality, and that includes boilers and hydronic heat. We do not do plumbing, water heaters or water softeners, and we will point you to someone who does.
Who you are dealing with
The credentials, and what they actually mean
Logos on a website are easy. Here is what each of these is and why it should matter to you.
Carrier President's Award, 8 times
Carrier's top dealer award. It is judged on installation quality, customer satisfaction and how the business is actually run, not on how much equipment you move.
Carrier Factory Authorized Dealer
The top tier of Carrier's dealer program. It has to be re-earned, and it is the reason we can offer the factory warranties and the equipment lines that a general dealer cannot.
NATE-certified technicians
North American Technician Excellence is the trade's independent certification. It is a real exam on real equipment, and it is the difference between someone who swaps parts and someone who finds the cause.
1130 Michigan Ave, Oostburg
A real building with real people in it, Monday to Friday, 7am to 3pm. You are welcome to walk in with a filter and ask what size you need.
Hours and directionsStraight answers
Questions people ask before they call us
Who owns Advanced Comfort Systems?
Jim Blok and Aaron Anger, who have been the owners since 2008. It is locally-owned and operated like a family, not a branch of a regional roll-up, and the owners are the people who answer for the work.
What brands does Advanced Comfort Systems install?
We install Carrier for ducted heating and cooling and Mitsubishi for ductless systems and mini-splits. We service every major brand regardless of who installed it, so you do not need to own a Carrier for us to come out. Sticking to two lines is a choice: it means our technicians know those systems properly rather than passably.
What does Carrier Factory Authorized Dealer mean?
Factory Authorized Dealer is the top tier of Carrier's dealer program, and it has to be re-earned rather than bought once. It requires factory training on current equipment, NATE-certified technicians, proper insurance and licensing, and customer-satisfaction scores that Carrier audits. Practically, it is what lets us register the full factory warranties and quote the equipment lines a general dealer cannot.
What is the Carrier President's Award?
The President's Award is Carrier's highest recognition for a dealer, and Advanced Comfort Systems has won it eight times, most recently in 2025. It goes to Factory Authorized Dealers judged on installation quality, customer satisfaction and how the business itself is operated, which is why it is a better signal than sales volume.
Are your technicians certified?
Yes. Our technicians are NATE-certified, which is the trade's independent certification and involves sitting real exams on real equipment. It is not a class you attend for an afternoon.
Do you do plumbing, water heaters or water softeners?
No. Advanced Comfort Systems does heating, cooling, ventilation and indoor air quality only. We do work on boilers and hydronic and radiant heating, because hot-water heating is a heating system rather than plumbing, but water heaters, softeners, drains and well work are not ours. Ask us and we will point you at somebody good.
What area do you cover?
Sheboygan County and the lakeshore south into Ozaukee County, from Elkhart Lake down to Grafton. The full list of towns is here. If you are not sure whether you are inside it, call and ask rather than guessing.
What does the 100% satisfaction guarantee cover?
Our work carries a 100% satisfaction guarantee for one year. If something we installed is not right, we come back and put it right. We will hand you the written terms with your quote, because a guarantee you have not read is not worth much.
Come by, or we will come to you.
The shop is at 1130 Michigan Ave in Oostburg and the door is unlocked Monday to Friday. If it is easier, tell us what the system is doing and we will come and look at it.
Or call us directly
(920) 564-2333Mon–Fri 7am–3pm. After hours, the same number reaches our on-call technician.