HVAC Services in Mukwonago, WI

Residential & Commercial Heating & Cooling for Mukwonago and Southeastern Wisconsin

Since 1978, H.J. Faust, Inc. has kept homeowners and businesses comfortable across southeastern Wisconsin. With more than 20,000 clients in our install base and over four decades of continuous operation, we bring experience to every job. Whether you need a new system installed, an urgent repair, or scheduled maintenance, our team handles the full range of HVAC work, from design-build and new construction to systems upgrades and sheet metal fabrication.

Wisconsin winters are unforgiving, and summer humidity doesn’t give Mukwonago homeowners much of a break either. Year-round HVAC reliability isn’t a luxury here. It’s a necessity.

Ready to schedule service or get a free estimate? Call our team at (262) 418-0700 and we can find a time that works for you. Emergency service is available 24/7.

What Sets H.J. Faust, Inc. Apart

Credentials matter in this industry, but training infrastructure matters more. Our mechanics go through the state-approved Associated Builders and Contractors (ABC) Apprentice Program, a five-year curriculum that combines classroom instruction with hands-on fieldwork under direct Senior Mechanic supervision. That structured pipeline is how we develop technicians who can handle complex installs and diagnose problems accurately, not just swap parts. Every field and office employee also attends a minimum of four training sessions per year to stay current on new equipment, technologies, and processes.

On your job, that preparation shows up in who arrives at your door: NATE-certified, factory-trained technicians who are fully licensed and insured. NATE certification is the nationally recognized standard for competency in heating, cooling, ventilation, and refrigeration. We’re also BBB accredited, and our track record with customers reflects it: hundreds of Google reviews have earned us an Excellent rating, with customers consistently pointing to our promptness, clear communication, and thorough work.

One concern we hear often is whether a contractor may push for a full replacement when a repair would do. Our service calls start with a thorough inspection, and we recommend what your system actually requires. No upsells, no unnecessary replacements.

HVAC Services We Provide for Mukwonago Homes & Businesses

We serve both residential and commercial customers throughout the Mukwonago area. We install Lennox systems and service all major brands, including Carrier, Daikin, Goodman, Honeywell, Trane, and Bryant. Before any equipment is selected, we size the system properly for your specific home or building. An oversized or undersized unit wastes energy and can wear out faster than one matched to the load it’s actually serving.

Our residential services include:

• AC installation and replacement
• AC repair
• Mini split installation
• Indoor air quality

Our commercial services include:

• Commercial cooling
• Commercial heating

Ductless mini split systems are also available for additions, older homes without ductwork, or any space where a traditional ducted system isn’t practical.

Emergency repairs can’t wait for business hours. Our technicians are available around the clock for urgent heating and cooling calls so Mukwonago residents and businesses have access to help when it matters most.

Annual Maintenance Agreement

The best way to help avoid a heating or cooling breakdown is to schedule ahead of it. We recommend one spring check-up for your air conditioning system and one fall check-up for your heating system before each season’s peak demand arrives. Our Annual Maintenance Agreement makes that straightforward.

The plan includes:

• A furnace check-up and an air conditioner check-up
• A 30-point inspection each visit
• Priority scheduling when you need service
• No overtime charges for after-hours calls
• A 10% discount on all parts and labor when repairs are needed

Regular maintenance can extend equipment life, improve efficiency, and reduce the chance of a failure on the coldest night of a Wisconsin winter. The Agreement turns twice-yearly service into something you schedule once and don’t have to think about again.

Community Involvement & Environmental Responsibility

Each year, we participate in the Lennox Feel the Love program, a co-sponsored initiative that nominates deserving community members, including educators, first responders, veterans, and families facing hardship, to receive new Lennox heating or cooling equipment and installation at no cost. Beyond that program, we sponsor the Tall Tales Music Festival, the Burlington Turkey Trot benefiting Love, Inc., and the Transitional Living Center of Burlington, and we support local schools, athletic programs, and the Chamber of Commerce. On the environmental side, every eligible material is recycled on every job, and the rest is disposed of responsibly to reduce our ecological footprint. These aren’t afterthoughts. They’re part of how we operate.

Request HVAC Service in Mukwonago Today

Getting started is simple. We offer free estimates on new equipment and installations, competitive pricing, and flexible scheduling to fit your timeline and budget. Whether you’re dealing with an urgent breakdown or planning a system upgrade, we’re ready to help.

We don’t ask for a commitment before we’ve had a chance to evaluate your system. Our inspection-first approach means you’ll know what your equipment needs before any decision is made.

Call H.J. Faust, Inc. at (262) 418-0700 to schedule HVAC service in Mukwonago or request a free estimate online. We’re available 24/7 for emergencies.