Commercial HVAC & Mechanical Contractors in Waukesha, WI.

HVAC Installation

Waukesha owners and general contractors looking for commercial HVAC get in-house crews based in Butler right here in Waukesha County. We install and replace rooftop units (RTUs), chillers, boilers, VRF and split systems, and ventilation for new construction and existing buildings, and our EPA 608 certified technicians handle refrigerant safely and to code. Because we also self-perform electrical work, equipment and power are planned together under one contract. See our commercial HVAC installation services.

Planned Maintenance

Our HVAC contractors stay with Waukesha facilities after closeout. Planned maintenance agreements put RTUs, chillers, boilers, VRF systems, and ventilation on a regular service schedule, helping equipment run efficiently, last longer, and show problems before they turn into failures. Service requests are handled during office hours (Mon–Fri, 7am–4pm); call (262) 781-9210, or explore our full mechanical & HVAC services.

Occupied-Facility Work

Most HVAC replacements happen in buildings that stay open. We sequence the work around daily operations and phase it so the spaces in use keep working while the next area is upgraded, with the electrical scope planned in the same phases by the same company.

Waukesha County Courthouse. A 151,000 ft² occupied renovation, underway since 2023, with electrical, lighting, fire alarm, and low voltage work phased around a courthouse that stays open, with new feeders routed through crawl tunnels beneath the building. See more in our projects portfolio.

Planning an HVAC Replacement

A replacement goes smoother when the facts are gathered first. Before requesting pricing, collect the make, model, and age of the existing equipment, any maintenance records, and a list of comfort or air quality complaints from occupants. Note roof access, structural limits, and where equipment can be staged, since rooftop units and chillers have to reach their final location before they can be connected. It also helps to confirm the electrical service feeding the equipment, because new units don't always share the old ones' power requirements, a detail our electrical crews review as part of the same scope. If the replacement is part of a larger renovation, share the overall construction schedule as well, so mechanical work is sequenced with the other trades instead of squeezed in around them.

Scheduling Around Wisconsin Seasons

Timing is one of the biggest decisions in any HVAC project. Boiler work is easiest to schedule before the heating season, and cooling equipment is easiest to replace before summer loads arrive. Lead times for larger equipment can stretch for months, so ordering early keeps a planned replacement from turning into a rushed one. In occupied buildings, that timing is combined with phasing so each area keeps the heating, cooling, and ventilation it needs while work moves through the building.

Once new equipment is running, recording startup settings, filter sizes, and belt information gives facility staff and maintenance technicians a baseline to compare against at every visit. That baseline makes it easier to spot a unit drifting out of its normal range before occupants start to notice.

Energy Efficiency Upgrades

Replacing aging equipment is often the best chance to cut energy use. High-efficiency rooftop units, variable-speed fans, and updated controls can lower operating costs while improving comfort, and the savings grow the longer the building runs. Waukesha owners weighing an upgrade should compare the cost of new equipment with what the existing units spend on energy and repairs each year. Because we carry the electrical scope too, the power and controls for new equipment are planned in the same project.