Reach out to us at (920) 636-8701 for a quick response. We'll discuss your furnace issues and set a convenient time for in-home assessment.
Upon arrival, I'll conduct a thorough inspection. We'll diagnose the problem and provide honest repair-first solutions with straightforward pricing.
If parts are available, we'll fix the issue on the spot. Otherwise, we'll keep you updated on part availability and swiftly return for repair.
We ensure everything is working flawlessly before leaving. If any concerns arise, count on us to come back and resolve them, keeping our promise to make it right.
Get quick answers to your questions about our furnace services.
Yes, we repair all major furnace brands to keep your home warm and safe.
No, our focus is on honest repair-first service. We only recommend a replacement when absolutely necessary.
If your furnace is making strange noises, blowing cold air, or not turning on, it's time to give us a call for a professional assessment.
Often, repairs are completed during the service visit if parts are available. Otherwise, we'll schedule a follow-up once parts arrive.
Yes, there's an $80 trip/diagnostic fee, with time-and-materials billing for any repairs.
We serve Appleton, WI, and the surrounding areas, covering a 25–30 mile radius.
Real experiences from homeowners who've trusted our warmth
We bought a new-to-us home at the end of June and quickly realized that the AC wasn't turning on. Our general contractor brought out Jordan from Conradt Quality Air, who diagnosed the problem instantly—the AC had been completely disconnected inside the HVAC system—and had us up and running in no time. We were so impressed that we had our contractor bring Jordan back for some complex, custom work: 1. Corrected major structural issues left by previous installers who had cut floor joists to run ductwork, causing them to crack. He properly rerouted the kinked ductwork through tight spaces under and around the joists so our contractor could sister and reinforce them. 2. Replaced old Grade 1 insulated lines with durable metal ones. 3. Capped and removed an unmaintained whole-house humidifier (adding a handy water line shut-off valve for future use). 4. Rerouted and capped the furnace exhaust and intake from the chimney stack in preparation for taking down our condemned chimney. 5. Added protective wire coverings over our HVAC exhaust lines so we don’t have any surprise visitors making a home in our furnace. Jordan is professional, polite, and communicative. He took the time to explain what he was doing and intentionally set things up to make future maintenance easier. He also did a fantastic job cleaning up the workspace when finished. We highly recommend Jordan and Conradt Quality Air!
Great Business. Owner/technician came out to assist with a unit that was freezing up and leaking water. Resolved the problem.
Jordan responds well via text, email & phone calls. Good follow-up & quality trusted work.
Jordan went above and beyond to verify my A/C evaporater failure and spent a lot of time with the warranty company validating the failure so they should pay for replacement. I recommend Conradt Quality Air for your furnace and air conditioning needs.
Jordan Conradt was wonderful to work with. He was extremely thorough and patient. He arrived, assessed the condition of my AC (which is over 40 years old), and found the leak! He determined the fix (did not pressure to just replace)…. When approval was given, he fixed the issue and recharged the system….working great now!
Asked him to fix a venting issue with a bathroom fan, and did an amazing job! 10/10 would recommend!
Call us now, the Fox Valley's trusted furnace experts, for quick and reliable service!

Offering exceptional Furnace Services, our team is committed to providing top-quality services to meet all your HVAC needs.
Welcome to Conradt Quality Air, your trusted partner in keeping your home warm and cozy throughout the winter months. With our expert furnace services, you'll ensure your heating system operates efficiently and safely, providing the comfort you and your family deserve.
Our furnace repair services are designed with your convenience in mind. We charge an $80 trip/diagnostic fee and then price repairs on a time-and-materials basis. This ensures you only pay for the service you truly need. We prioritize repairs over replacements to save you money. Replacements are recommended strictly when they're the best option for long-term reliability and efficiency.
Trust in our straightforward diagnostics. During our visit, we identify issues, clearly explain our findings, and discuss part costs and availability with you. Many times, we can fix the problem right away if parts are available. When parts need to be ordered, we schedule a return visit, minimizing downtime in your home comfort.
Our nine years of hands-on experience equips us to work on all furnace brands and models. We treat every call with care, whether you live in Appleton or the neighboring areas such as Green Bay and Oshkosh.
Not only do we cover a wide service area from Green Bay to Oshkosh, but being locally based means quick response times when you need us the most. We pride ourselves on providing professional, honest, and repair-first services without any upselling pressure.
Contact us at (920) 636-8701 to schedule your service today. Trust Conradt Quality Air for all your furnace needs and enjoy a warm, safe, and comfortable home, no matter the season.