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31 Years
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Emergency
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Trusted HVAC Design/Build Solutions Nationwide
Wiegmann & Associates has specialized in innovative, energy-saving commercial HVAC solutions since 1995. As a national leader in design/build mechanical contracting, we combine value engineering expertise with a commitment to energy efficiency and cost-effectiveness. Our team delivers projects up to $35 million across 42 states, prioritizing client needs through tailored solutions and on-time, on-budget execution. With deep industry expertise spanning commercial, industrial, and institutional sectors, we emphasize safety, reliability, and long-term building performance.

Our 24/7 service team ensures emergency support and preventative maintenance for the lifecycle of every project. Backed by decades of experience and a client-first corporate culture, we serve diverse industries including healthcare, education, government, and food & beverage. Our national capabilities and local market understanding enable us to tackle complex HVAC challenges while maintaining a focus on simplicity and proven reliability.
Services
HVAC Design/Build Value Engineering Energy Solutions Facility Services 24-Hour Service Plan/Spec Projects
Details
  • Year established: 1995
Highlights and features
  • 25+ years of specialized HVAC design/build expertise since 1995
  • Completed $35M+ projects across 42 states with on-time delivery
  • National 24/7 service team for emergency repairs and maintenance
  • Proven value engineering approach reducing long-term energy costs
  • Safety-certified professionals serving commercial, industrial, and institutional sectors
Services
HVAC Design/Build
Our integrated HVAC design/build approach delivers customized mechanical solutions for commercial and industrial projects. By combining engineering expertise with construction management, we streamline project timelines while maintaining energy efficiency and cost-effectiveness. This method ensures systems are optimized for each facility's unique requirements, from initial concept through installation.
Value Engineering
Our value engineering process identifies cost-saving opportunities without compromising quality. By analyzing construction methods and material choices, we reduce upfront costs while enhancing long-term energy efficiency. This approach maintains system performance standards while delivering measurable savings over the building's lifecycle through smarter design decisions.
Energy Solutions
We design HVAC systems that maximize energy conservation while maintaining optimal performance. Our engineers focus on sustainable technologies and system configurations that reduce operational costs. By prioritizing proven reliability and simplicity in design, we create solutions that deliver immediate savings and long-term environmental benefits for commercial facilities.
Facility Services
Our comprehensive facility services include preventative maintenance and emergency repairs for existing HVAC systems. With 24/7 service availability, we minimize downtime while extending equipment lifespan. Our technicians provide ongoing support to maintain system efficiency and address urgent operational needs across commercial and industrial facilities.
24-Hour Service
Critical HVAC failures require immediate attention, which is why we offer round-the-clock emergency service. Our dedicated dispatch team connects clients with trained technicians who respond promptly to urgent repair needs. This service ensures business continuity for facilities requiring uninterrupted climate control and mechanical operations.
Questions
What HVAC services does Wiegmann Associates offer?
We provide full-service HVAC solutions including design/build projects, value engineering, energy-efficient system installations, preventative maintenance, and 24/7 emergency repair services for commercial and industrial facilities.
In which states do you operate?
We serve clients in 42 states nationwide, with project experience from Missouri to Colorado, California to New York, and locations in between for both design/build and service projects.
Do you handle large-scale HVAC projects?
Yes, our team manages complex HVAC projects up to $35 million, including multi-state rollouts and large commercial developments requiring coordinated mechanical contracting expertise.
What industries do you specialize in?
We serve diverse sectors including healthcare, education, government facilities, industrial plants, food & beverage operations, senior living centers, and commercial real estate developments nationwide.
Is emergency HVAC service available?
Yes, our 24/7 emergency service team responds to urgent HVAC failures with trained technicians available around the clock to minimize facility downtime and restore operations.
How does your value engineering process work?
Our value engineering analyzes construction methods and material choices to reduce costs while maintaining quality. We identify savings opportunities during design that improve long-term energy efficiency without compromising system performance standards.