Business Details
30 Years
experience
Emergency
services
Expert Commercial & Industrial HVAC Services in Waukesha, WI
Dillett Mechanical Service has been a trusted leader in commercial and industrial HVAC solutions since 1996. Founded by Mike Dillett, our team combines over 30 years of industry expertise with a commitment to innovation and customer partnership. We specialize in reducing clients' reliance on external contractors by training in-house teams and implementing customized preventive maintenance plans. Our union-trained technicians deliver 24/7 emergency service with a two-hour response guarantee, supported by state-certified apprenticeship programs. We prioritize environmentally-friendly systems, energy efficiency, and cutting-edge technology through continuous staff education.Our approach emphasizes transparency, accountability, and long-term partnerships built on trust. With capabilities spanning chiller installations, refrigeration systems, and sheet metal fabrication, we serve diverse industries including biotech, agriculture, and data centers. Our mission remains focused on delivering superior value through tailored solutions that evolve with clients' needs. Recognized for technical excellence and customer care, we maintain certifications with leading manufacturers like Carrier and Bitzer. This combination of experience, training, and client-centric philosophy has sustained our success in the HVAC industry for over two decades.
Services
HVAC Service
Sheet Metal Fabrication
Chiller Installation
Refrigeration Systems
Controls Integration
Preventive Maintenance
Emergency Repairs
Energy Audits
Solar Integration
Dust Collection
Details
- Year established: 1996
Highlights and features
- 30+ years of commercial HVAC expertise with union-certified technicians
- 24/7 emergency service with guaranteed two-hour response time
- Customized preventive maintenance plans reduce long-term costs
- Factory-trained specialists for Carrier and Bitzer equipment
- Energy-efficient solutions with renewable energy integration options
What people say
50% reduction in HVAC electric use
24/7 emergency service
Timely repairs
Competitive rates
Expert technicians
Services
HVAC Service
Our comprehensive HVAC services cover installation, repair, and maintenance of commercial and industrial heating, ventilation, and air conditioning systems. We specialize in large-scale equipment including rooftop units, air handlers, and high-efficiency boilers. Our technicians provide 24/7 emergency response with a two-hour service guarantee, ensuring minimal downtime for critical operations.
Sheet Metal Fabrication
On-site sheet metal fabrication capabilities support custom HVAC system installations and repairs. We manufacture ductwork, ventilation systems, and specialized metal components to exact specifications. Our union-certified craftsmen handle projects from small repairs to complete system installations, ensuring proper airflow and system efficiency for commercial facilities.
Chiller Installation
Specialized chiller services include installation, retrofitting, and maintenance of water-cooled centrifugal and screw chillers. Our Bitzer-certified technicians optimize system performance through vibration analysis, thermal imaging, and compressor overhauls. We focus on energy-efficient upgrades that reduce operating costs while maintaining precise temperature control for mission-critical environments.
Refrigeration Systems
Full-service refrigeration solutions for walk-in coolers, industrial freezers, and beverage systems. We service all major brands with 24/7 emergency availability, offering energy efficiency upgrades and preventive maintenance. Our technicians handle low-temperature cascade systems and large industrial refrigeration units, ensuring compliance with food safety and industrial standards.
Preventive Maintenance
Customized preventive maintenance programs extend equipment lifespan and prevent unexpected failures. We create electronic maintenance logs, perform regular system evaluations, and develop long-term budget plans for equipment replacement. Our approach combines predictive analytics with hands-on inspections to maintain optimal system performance across commercial and industrial facilities.
People
Mike Dillett
Founder
With over 30 years in commercial HVAC, Mike established Dillett Mechanical Service in 1996. He pioneered the company's partnership approach, focusing on client training and preventive maintenance solutions that reduce dependency on external contractors.
Paul Dillett
Project Manager
Paul oversees complex HVAC installations and system retrofits. His expertise in chiller systems and energy efficiency upgrades comes from managing hundreds of commercial projects, maintaining the company's commitment to technical excellence and client education.
Linda Dillett
Operations Manager
Linda coordinates service dispatch and preventive maintenance programs. She ensures 24/7 service availability and manages technician training initiatives that keep staff current with evolving HVAC technologies and industry standards.
Tom Dillett
Service Manager
Tom leads the emergency response team with a focus on rapid problem resolution. He implements the company's two-hour service guarantee and trains technicians in the latest diagnostic and repair techniques for commercial HVAC systems.
Jim Dillett
Sales Manager
Jim develops client partnerships and consults on energy-efficient solutions. He specializes in connecting clients with appropriate HVAC technologies and financing options, emphasizing long-term cost savings and system reliability.
Questions
What commercial HVAC services do you offer?
We provide full-service HVAC solutions including installation, repair, preventive maintenance, chiller services, refrigeration systems, and energy efficiency upgrades for commercial and industrial clients.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency service with a guaranteed two-hour response time for critical HVAC failures in commercial facilities.
How do preventive maintenance plans work?
Our customized plans include regular system inspections, electronic maintenance logs, and budget forecasting. We train client teams to handle routine tasks while providing expert support for complex maintenance needs.
Can you integrate renewable energy systems?
Yes, we offer solar thermal and photovoltaic system installations with incentive program support to reduce energy costs for commercial facilities.
What makes your service different?
We combine 30+ years of experience with union-certified technicians, manufacturer certifications, and a partnership approach that trains client teams to reduce long-term dependency.
Do you service all HVAC equipment brands?
Yes, our technicians service all makes and models of HVAC equipment, including specialized systems for data centers, biotech facilities, and industrial applications.
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