Our Commercial HVAC Services
Complete solutions for every aspect of your facility’s heating, cooling, chiller, and control needs—trusted by Waukesha and Milwaukee businesses.
Water-Based Comfort, Designed for Performance
Advanced Chiller Services is your one-stop provider for commercial HVAC services in Waukesha and the Greater Milwaukee area. From massive chillers to rooftop AC units, advanced building controls, and preventive maintenance programs, we handle every part of your facility’s comfort and operational reliability. With our specialized expertise, you won’t need multiple contractors—our certified technicians do it all, saving you time and hassle.
Chiller Services
Expert repair, maintenance, and retrofits for large water-cooled and air-cooled chillers—including centrifugal and screw systems. We’re the local leader in chiller diagnostics, overhauls, tube cleaning, refrigerant analysis, compressor retrofits, and efficient replacements. Trusted by facility managers across schools, industrial plants, and commercial buildings throughout Southeastern Wisconsin.
Learn more about our Chiller Services
Hydronic System Retrofits
Comprehensive commercial air conditioning solutions—emergency repair, scheduled maintenance, and new system installations for rooftop units, split systems, cooling towers, and more. Our team is ready to keep your building comfortable and energy-efficient, from single retail stores to multi-zone office complexes.
Learn more about our Cooling & AC Services
Equipment Replacements
Full-service commercial heating care—boiler and furnace repairs, annual inspections, new unit installations, and system upgrades. We support everything from high-efficiency steam and hot water boilers to unit heaters, ensuring your facility stays warm and safe during Wisconsin winters.
Learn more about our Heating & Boiler Services
HVAC Controls & Automation
Seamless integration, programming, and troubleshooting for building automation systems, climate controls, and smart thermostats. Unlike most HVAC contractors, we’re qualified to service both the equipment and the controls—so you get one team to handle everything from DDC programming to optimizing system setpoints for comfort and savings.
Learn more about our HVAC Controls & Automation
Repair & Maintenance
Protect your investment with a customized maintenance plan. Regular inspections, tune-ups, performance checks, and priority support help avoid breakdowns, extend equipment life, and keep energy bills under control. Join leading facilities in Waukesha and Milwaukee who trust us for reliable, proactive HVAC maintenance.
Learn more about Preventative Maintenance Programs
Emergency HVAC Service
When critical systems fail, our technicians are on call to provide emergency commercial HVAC repairs—including chillers, boilers, and cooling systems. We respond promptly to urgent calls in Waukesha, Milwaukee, and neighboring communities, working efficiently to restore comfort and operation as quickly as possible.
Contact us for a consultation or to request service for any HVAC issue. We’re here to help your facility stay comfortable, safe, and efficient—no matter how complex the challenge.
Frequently Asked Questions
Can Advanced Chiller Services handle both mechanical HVAC systems and building controls for my facility?
Absolutely. One of our core differentiators is our ability to provide both expert mechanical HVAC service and advanced building controls integration—so you don’t have to juggle multiple contractors for repairs, upgrades, or troubleshooting. Our technicians have specialized backgrounds not only in chillers, boilers, air handlers, and rooftop units, but also in programming, optimizing, and maintaining building automation systems (BAS), smart thermostats, and multi-zone controls.
This means we can diagnose system-wide problems, optimize performance, and coordinate repairs end-to-end. Whether your issue is with a physical component, a control sensor, or the software running your building’s HVAC, our team can address it. This holistic approach reduces downtime, streamlines communication, and keeps your facility running efficiently.
What makes your chiller and boiler services different from other HVAC companies in Waukesha and Milwaukee?
Chiller and boiler service is a true specialty—many commercial HVAC contractors shy away from large, complex equipment. Our team is led by factory-trained technicians with experience on all major chiller and boiler brands, including Carrier, York, Trane, and more. We provide diagnostics, repair, tube cleaning, compressor overhauls, and even full replacements for both water-cooled and air-cooled chillers, as well as modern and legacy boiler systems.
We understand that these systems are mission-critical in schools, manufacturing plants, and large commercial buildings. That’s why we emphasize rapid response, in-depth troubleshooting, and carrying the right tools and parts for quick fixes. Our knowledge allows us to recommend the best solution, whether it’s a targeted repair, a retrofit, or planning for equipment replacement with minimal disruption to your operations.
We know downtime is costly for office managers and disruptive for retail operations. That’s why we offer flexible scheduling—including after-hours or weekend work—to avoid impacting employees or customers. Our preventative maintenance helps reduce utility costs and extend system life, while emergency service guarantees rapid response when issues arise. Whether you manage a single boutique or a high-rise office complex, our commercial HVAC service plans are built to keep your building running smoothly.
Do you offer preventative maintenance programs, and what do they include?
Yes—we offer customizable preventative maintenance programs for all commercial and industrial HVAC systems. Our plans are designed to extend equipment life, avoid costly breakdowns, and ensure energy-efficient operation. Each program is tailored to your facility’s needs, whether you have chillers, boilers, rooftop units, or a mix of equipment. We handle seasonal inspections (cooling checks in spring, heating in fall), filter changes, coil cleaning, lubrication, refrigerant checks, performance testing, and complete safety evaluations.
Our maintenance agreements include detailed service reports, reminders for upcoming maintenance, and priority service in the event of a breakdown. Clients with a contract also benefit from preferred rates on repairs and the peace of mind that their HVAC investment is protected. Many manufacturers’ warranties even require annual maintenance—our documentation helps you stay compliant.
We also help manage facility air quality by optimizing ventilation, exhaust, and make-up air units to maintain compliance with OSHA and local codes. Many plants benefit from our ability to troubleshoot complex controls, integrate new automation, and upgrade legacy systems to improve both efficiency and reliability. With a deep understanding of the industrial environment, we provide both emergency support and long-term system optimization—helping your operation maintain safety, productivity, and regulatory compliance.
What types of commercial buildings and industries do you serve?
Our experience spans a broad range of facilities: schools and universities, office buildings, retail centers, industrial plants, manufacturing facilities, warehouses, and more. Each building type has unique requirements—quiet, energy-efficient climate control for classrooms, robust cooling for server rooms or process equipment, and coordinated scheduling for multi-tenant buildings.
We understand the nuances of these different environments and tailor our solutions accordingly. Whether it’s upgrading ventilation in an educational facility, balancing air for a shopping center, or providing process cooling for a factory, our technicians have seen it all. We’re proud to be trusted by clients throughout Waukesha County, Milwaukee, and Southeastern Wisconsin for both ongoing maintenance and one-time projects.
Our upgrade recommendations are always tailored to your business goals—whether that’s reducing energy costs, improving comfort, increasing reliability, or meeting new code requirements. We propose solutions that fit your budget and operational schedule, from phased component replacements to full system retrofits or controls integration. We’ll also assist with rebate or grant paperwork (such as Focus on Energy in Wisconsin) and guide you through every step of the upgrade process, minimizing disruption and maximizing long-term value for your facility.
How does Advanced Chiller Services approach energy efficiency upgrades for commercial HVAC systems?
Energy efficiency is a priority for facility managers looking to reduce operational costs and meet sustainability goals. Our approach begins with a detailed evaluation of your current HVAC systems—whether chillers, boilers, RTUs, or building controls—to identify inefficiencies and areas for improvement. We recommend solutions such as high-efficiency equipment replacements, variable frequency drives, smart controls upgrades, and retro-commissioning to ensure every component runs at peak performance.
We also help clients take advantage of local rebate and incentive programs, such as Focus on Energy in Wisconsin, which can offset the upfront cost of upgrades. Our team manages the process from analysis and design through installation and optimization, so you see measurable reductions in energy use and utility bills. Whether it’s a simple controls adjustment or a full system retrofit, we provide the guidance and expertise needed for lasting efficiency gains.
What types of HVAC controls and automation systems do you work with, and how do these benefit my building?
We are experienced with a wide range of HVAC control and building automation platforms, including Johnson Controls, Honeywell, Carrier i-Vu, Trane Tracer, and many others. Our team can design, install, program, and troubleshoot BAS for both new and existing buildings, offering solutions from basic programmable thermostats to complex multi-zone digital control systems.
Upgrading or optimizing controls allows you to automate schedules, monitor energy usage, and fine-tune comfort levels across your facility—all from a single interface or even remotely. This not only saves time and money, but also allows you to respond quickly to changing needs, such as adjusting ventilation rates for air quality or reducing setpoints after hours. We help you harness the full potential of your HVAC system through intelligent controls and proactive system management.
Custom hydronic systems engineered for new homes, remodels, and ground-up builds.
New Construction Installations
Upgrade older properties with modern radiant heating solutions tailored to existing layouts.
Hydronic System Retrofits
Keep your system running efficiently with expert service—available as on-demand repairs or scheduled maintenance contracts.
Repair & Maintenance Plans
Swap outdated boilers and pumps for high-efficiency upgrades that improve performance and reliability.
Equipment Replacements
Precision system planning and layout built for long-term comfort, efficiency, and code compliance.
System Design & Engineering

Every hydronic system we build is designed with precision, customized to the space, and supported for the long run. Whether you're planning new construction or exploring options for improving an existing system, Advanced Hydronics delivers high-performance, water-based heating and cooling tailored to your exact needs. Let’s build comfort that lasts.

New Construction Installation
Custom hydronic systems for new homes and remodels—designed for comfort, performance, and long-term value.

Retrofit Installation
Upgrade existing homes with modern radiant floor heating, cast iron radiator systems, or baseboard heat.

Repair & Maintenance
From on-demand repairs to ongoing hydronic maintenance plans, we keep your system running efficiently.

Repair & Maintenance
From on-demand repairs to ongoing hydronic maintenance plans, we keep your system running efficiently.

Design & Engineering
Expert system layout and technical planning for custom builds and architect-designed homes.

