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HVAC work

Wiegmann Associates completes HVAC work for new retail and office building at the Streets of St. Charles

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Wiegmann Associates has completed HVAC work for the new $8.3 million retail and office building at the Streets of St. Charles development in St. Charles, MO. Wiegmann served as the mechanical contractor and provided value engineering services for the 60,000-square-foot building. The general contractor was Brinkmann Constructors. The architect was Oculus Inc.

Wiegmann’s HVAC design solution features an energy efficient, high-performing Rooftop Variable Air Volume (VAV) HVAC system to serve the new three-story building. The building features retail spaces on the first floor and offices on the top two floors, which Wiegmann will finish for the new tenant, Elekta.

Wiegmann’s value engineering of the system, including right-sizing equipment and streamlining duct design, saved more than 43 percent on upfront HVAC costs. Wiegmann also designed and installed a custom Delta Controls Direct Digital Control (DDC) system, which allows the owner to remotely monitor and control the HVAC system. This Building Automation System improves acoustical performance, optimizes energy savings and reduces operating costs by decreasing fan and electric reheat energy.

The Streets of St. Charles is a 27-acre development, home to a variety of retail, dining, entertainment, hospitality, multi-family housing and offices.

Wiegmann Associates is a St. Louis-based mechanical contractor and a national leader in design/build HVAC projects. Since 1995, Wiegmann Associates has engineered and installed innovative, energy saving and cost-efficient HVAC solutions, refrigeration systems and automation controls for clients in a wide range of industries, including senior living, food and beverage distribution, warehouse, healthcare, commercial and industrial. Wiegmann also provides 24-hour preventative maintenance programs and service in the St. Louis region. Wiegmann is ranked among the top 50 specialty contractors in the Midwest by Engineering News Record and the top 10 largest mechanical contractors by the St. Louis Business Journal. For more information, visit www.wiegmannassoc.com or call (636) 940-1056.

Wiegmann Associates Completes HVAC Work on Nazareth Living Center

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Nazareth Living Center

Wiegmann Associates has completed HVAC work for the new $22.15 million assisted living facility on the Nazareth Living Center campus in St. Louis, MO. Wiegmann served as the design/build mechanical contractor and Engineer of Record (EOR) consultant for the 60-suite, 70,000-square-foot complex. The general contractor was BSI Constructors and Northstar Management Company served as the construction representative for Nazareth Living Center. The architect was Lawrence Group out of St. Louis, MO.

Wiegmann’s HVAC solution features an energy efficient and cost-effective system that meets all the indoor air quality requirements suitable for a senior living center. A Variable Refrigerant Volume (VRV) system serves residential units in two, three-story towers. Each resident room has a dedicated fan coil unit, creating zone control for optimal, individualized comfort. The center also features an attached four-story tower with common areas that are served by a variable air volume rooftop system (VAV) equipped with fan terminal units for zone control and energy savings. In addition, Wiegmann installed a dehumidification unit for the facility’s pool building to ensure proper indoor air temperature and humidity.

Senior living facilities are built with very little space for equipment needed for HVAC, electrical, plumbing and fire protection. Through design coordination and onsite adjustments by all trades working on the Nazareth Living Center, the project was kept on time and on budget.

Nazareth Living Center is a Catholic, nonprofit community for older adults offering independent senior living apartment homes, long-term nursing care, assisted living, memory care, and skilled nursing & rehabilitation services.

Wiegmann Associates is a St. Louis-based mechanical contractor and a national leader in design/build HVAC projects. For more information, visit www.wiegmannassoc.com or call (636) 940-1056.

Wiegmann Associates completes HVAC Work for New St. Charles County Emergency Operations Center

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Wiegmann Associates has completed work on the St. Charles County Emergency Management’s new $20 million Emergency Operations Center in O’Fallon, MO. The new facility consolidates all of the county’s emergency resources under one roof and speeds response time. Contracting Business magazine awarded Wiegmann Associates a Design/Build award for the project. Wiegmann was the Engineer of Record (EOR) and design/build HVAC mechanical contractor for the project. Brinkmann Constructors was the general contractor.

The 30,000-square-foot, one-story building houses day-to-day operations of the Department of Emergency Communications, St. Charles County Police Department’s Division of Emergency Management and a 1,400-square-foot data center for county information technology operations and the county-wide emergency radio communications system.

Wiegmann’s scope of work included the design and installation of heating and cooling infrastructure for the facility and the mission-critical data center. Wiegmann built 100% redundancy into the HVAC systems and data center to ensure uninterrupted operation under any conditions.  Because the facility must operate during natural disasters and terrorist threats, it was built to comply with ICC500, the design and construction standard for storm shelters.

A Building Automation System (BAS) prioritizes cooling for critical areas. If building temperatures rise above a set point due to multiple equipment failures, the BAS system would start to cut off airflow to non-critical areas so critical areas such as the data center remained conditioned.

The HVAC system also provides tight humidity control to protect evidence housed in a 6,200-square-foot addition to the adjacent St. Charles County Police Department. A 6,300-square-foot addition to the adjacent fleet storage building is being used for maintenance and storage of the County’s Emergency’s vehicles and equipment.

This was the first time St. Charles County has engaged in the design/build process.  All other County buildings have been constructed with the design/bid/build process.

St. Charles County Emergency Management maintains the St. Charles County Emergency Operations Center (EOC), which coordinates with the cities within St. Charles County, as well as neighboring jurisdictions and state and federal agencies during emergency activations.  

Wiegmann Associates is a St. Louis-based mechanical contractor serving the commercial, industrial and institutional markets, and a national leader in design/build HVAC projects For more information, visit www.wiegmannassoc.com or call (636) 940-1056.

IFS Completes HVAC work on $26 million O’Fallon Justice Center

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Integrated Facility Services (IFS) installed the energy-efficient HVAC system at the new $26 million O’Fallon Justice Center, which opened this month. The 96,000-square-foot justice center houses the O’Fallon Police Department and Municipal Courts, Missouri. The construction manager was McCarthy Building Companies and the architect was Wilson Estes Police Architects.

IFS served as the organizing contractor developing the 3D BIM model for the facility’s mechanical, electrical, fire protection and plumbing systems. They facilitated all collision and coordination meetings between the MEP trades, architect, mechanical engineer, McCarthy and the City of O’Fallon to ensure that the project ran smoothly and efficiently with absolutely no collisions of craft. This allowed each trade to run a more efficient project while increasing productivity for both the trade contractors and the project as a whole.

IFS installed the entire HVAC system including five air handlers, a 350 nominal ton chiller and a dedicated air handling system for a seven-stall indoor firing range, which provides 60 fresh air changes per hour. They worked with the automation control contractors Trane Corporation and their subcontractor CE Jarrell Contracting Co. to assure a cohesive collaboration of mechanical equipment and controls for complete facility automation. IFS also installed a 6,000-gallon diesel tank and piping to fuel the dual-generator auxiliary power system.

The O’Fallon Justice Center features multiple courtrooms as well as 15 holding cells, a 70-seat training room, a 911 center, CSI lab space, offices, an evidence storage room, an employee break room, firing range, and space for expansion over the next 30 years.


Integrated Facility Services (IFS) is a full-service HVAC, plumbing, piping, fire protection and building automation firm with more than 270 professional and trade employees.For more information, call (636) 680-2100 or (573) 442-6100 and visit www.intfs.com.

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