Business Details
50+ Years
experience
Emergency
services
Your Trusted HVAC & Mechanical Solutions Provider in Wisconsin
Illingworth-Kilgust Mechanical has been delivering comprehensive mechanical solutions across Wisconsin for over 90 years. Our expertise spans HVAC systems, plumbing, sheet metal fabrication, building automation, and energy services, serving diverse industries including healthcare, manufacturing, education, and government. We combine innovative design with quality execution to meet full lifecycle facility requirements, maintaining a reputation for reliability and technical excellence. Our team of highly trained professionals utilizes advanced technologies like 3D CAD and BIM to ensure precision in every project. With offices in Milwaukee, Madison, and Green Bay, we provide responsive service supported by in-house fabrication capabilities.Our commitment to safety, LEED-accredited professionals, and MSCA Star-qualified status underscore our industry leadership. We specialize in minimizing project delays through single-source accountability while delivering energy-efficient systems that reduce operational costs. Our preventive maintenance programs and 24-hour emergency services ensure long-term system reliability. Backed by financial stability and a history of innovation since 1969, we deliver high-performance solutions tailored to complex facility challenges. This experience positions us as Wisconsin's trusted partner for mechanical construction and HVAC services.
Services
HVAC Installation
Plumbing Services
Sheet Metal Fabrication
Building Automation
Energy Management
Preventive Maintenance
Emergency Repairs
Indoor Air Quality
Medical Gas Systems
Custom Enclosures
Details
- Year established: 1969
Highlights and features
- We offer 90+ years of mechanical construction experience in Wisconsin
- Our team includes LEED-accredited professionals and certified welders
- We maintain 24/7 emergency service availability across the state
- Our in-house fabrication shop ensures quality control and faster delivery
- We utilize advanced BIM and 3D CAD technologies for precision projects
Associations and certifications
- LEED
- MSCA Star
Services
HVAC Installation
We design and install commercial HVAC systems for new construction and retrofit projects across Wisconsin. Our services include boiler and chiller installation, variable air volume systems, and rooftop unit replacements. Using 3D CAD technology and LEED-certified practices, we ensure energy-efficient solutions that meet ASHRAE standards while minimizing operational disruptions during installation.
Building Automation
Our building automation systems integrate HVAC, security, and energy management protocols using BACnet, Modbus, and IP standards. We provide custom programming and installation of direct digital controls that optimize facility efficiency while allowing seamless expansion through open-system architecture tailored to client requirements.
Sheet Metal Fabrication
In-house fabrication of ductwork, piping, and custom metal components meets industrial specifications. Our National Certified Pipe Welding Bureau-certified technicians work with steel, aluminum, and copper to produce over two million pounds of components annually, ensuring precise fit through CAD drawings and maintaining quality control in our indoor fabrication facility.
Preventive Maintenance
We offer scheduled inspections, filter maintenance, and system optimization for HVAC, plumbing, and mechanical equipment. Our programs reduce energy consumption by up to 25%, extend equipment lifespan, and include priority service status while maintaining 24/7 emergency support for critical system failures.
Indoor Air Quality
Our indoor air quality services combine needlepoint bipolar ionization, UV-C lamps, and MERV filtration upgrades to reduce pathogens by 99.9%. We implement EPA Energy Star-compliant solutions that improve HVAC efficiency by 75% while meeting CDC guidelines for commercial facilities through patented ionization technology and annual filter replacement programs.
Questions
What areas do you service?
We provide mechanical services throughout Wisconsin with offices in Milwaukee, Madison, and Green Bay.
Do you offer emergency HVAC repair?
Yes, our 24/7 emergency service responds to critical HVAC and plumbing failures across the state.
Are your technicians certified?
Our team includes LEED-accredited professionals and National Certified Pipe Welding Bureau-certified welders.
Can you handle large-scale industrial projects?
We specialize in complex projects up to 900,000 square feet with minimal operational disruption.
Do you provide energy efficiency solutions?
Yes, our LEED-certified team implements Energy Star-compliant systems that reduce energy costs by 25-40%.
What fabrication capabilities do you have?
Our facility produces 2+ million pounds annually of steel, aluminum, and copper components with 2-3 day lead times.
