Professional installation of new furnaces, air conditioners, and boiler systems with personalized recommendations and quality equipment.
Fast, reliable repairs for heating and cooling systems, including same-day service for urgent issues like breakdowns in extreme weather.
Routine check-ups and tune-ups to ensure your HVAC system runs efficiently and extends its lifespan.
Expert diagnosis of HVAC problems using methodical approaches to identify and fix issues quickly and accurately.
Complete replacement of old or failing systems with modern, energy-efficient options, including estimates and installation.

Your trusted partner for reliable HVAC solutions in Fitchburg—where comfort meets excellence.
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Leading Edge Heating & Air Conditioning is a premier HVAC contractor based in Fitchburg, WI, specializing in heating and cooling installation, repair, and maintenance. With a 5-star rating from 47 reviews, we pride ourselves on prompt, honest service and expert craftsmanship. Whether you need emergency repairs, system replacements, or routine maintenance, our team, led by owner Jim, provides personalized attention and high-quality work to keep your home comfortable year-round. We serve residential customers with integrity and efficiency, ensuring your HVAC needs are met with care and professionalism.
Installation and guidance on new thermostats to optimize home comfort and energy usage.
My AC stopped working the day before it was going to be 90+ degrees. I called Leading Edge HVAC, they came over, diagnosed and fixed my old AC same day. Jim said the repair may last 5 years of 5 days but we should budget for a new unit because it was so old (25 years old). He provided an estimate for a new furnace and AC, which included a partial refund on the repair. I gathered a couple of other estimates and decided to have Jim & his team complete the replacement because it was the best deal. The install was flawless and I’m happy with the equipment Jim recommended based on my complaints with the old set up. Our house cools quickly and I can’t wait to see what winter will be like with a new furnace.
Our furnace recently went out and we called Leading Edge Heating & Air Conditioning. It was determined that we needed to replace the furnace, not a surprise to us it was 17 years old and installed before we bought our house. Jim explained all our options and provided us with a quote within hours. On the day of installation, Jim’s team was on time, friendly, and professional, taking care to protect the flooring. All work was done in a timely matter and Jim walked me through the new thermostat. I would highly recommend Leading Edge over any of the big box companies.
My furnace stopped working recently; turning on intermittently before eventually not working at all. A previous contractor came out the day before and thought there were loose wires and did have it running, but it stopped shortly after they left. Jim did an incredible job diagnosing an issue with my furnace, which turned out to be less than ideal wiring from the original install. He was able to diagnose and fix the problem in less than 20 minutes due to his exceptional knowledge and methodical approach. Leading Edge has earned this customer for life!
When our furnace stopped running during single digit temps, Jim, owner of Leading Edge, responded immediately. He replaced our boiler system in just a few days, at a reasonable cost, and with personal care. He kept us informed every step of the way and put in an eleven hour day to make sure we had heat. If you are looking for HVAC service or replacement, Leading Edge will not disappoint. You'll get the personal attention of a small business with honesty and integrity. Thank you, Leading Edge!
Jim and his team were amazing! He was responsive to an immediate need I had for a replacement A/C. Leann answers questions in such a friendly way and the tech (Morgan I believe) got the new unit in effectively and well before the deadline. They worked with my unique situation in the midst of selling my home and I am so grateful for their kindness and expediency.
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