DISTRICT-WIDE HVAC DISTRICT-WIDE HVAC 162 Improvements in HVAC systems are crucial for optimizing learning environments within the school district in various ways. Productivity, comfort, and energy efficiency are essential for creating an optimal environment that promotes well-being, productivity, and academic success. We took into consideration efficiency while working with the district maintenance department to establish a list of district needs. Older HVAC systems tend to be less energy-efficient, leading to higher operating costs and increased utility bills. Upgrading to newer, more efficient equipment can result in significant long-term savings on energy consumption. We also considered reliability. Aging HVAC systems are more prone to breakdowns and malfunctions, causing disruptions in comfort and productivity. Replacing outdated equipment with newer models reduces the risk of unexpected failures and ensures a more reliable climate control system. Using these priorities at the forefront, we were able to work with the district to establish a list of needs, ranked from urgent to low. This process allows the district to plan further out into the future on where and how much funding they will need to allocate to which schools and which systems. HVAC IMPROVEMENTS OVERVIEW

This process allows the district to plan further out into the future on where and how much funding they will need to allocate to which schools and which systems. HVAC IMPROVEMENTS OVERVIEW ECS, Inc., Consulting Engineers completed the construction cost estimating effort for the HVAC improvements throughout the district. The construction cost estimates provided were based on the needs assessment data provided by the District’s Maintenance and Facilities Department and are conceptual in nature. These needs were assessed based on date of installation and expected life of current HVAC equipment. ECS accounted for two approaches to HVAC improvements. Provided are estimates for each priority level, where RED signifies needing replacement within 5 years, YELLOW suggests needing replacement within 10 years, and GREEN indicated needing replacement beyond 10 years. All equipment was grouped into one of the three ratings at each facility and comprehensive estimates were provided for each color rating. This estimating provides a conceptual idea of investment needed in an approximate timeline for upkeep of current systems. Additionally, ECS provided cost estimates for complete new systems at each facility. These estimates will assist the district in determining which is the best investment in each building. In some cases, routine maintenance and replacement of identified equipment is the most cost-efficient option. In other cases, a larger upfront investment for a new system could be a wiser option when considering total lifetime energy costs and efficiencies gained with system replacement. down the road. 163 COST ESTIMATION SUMMARY HVAC IMPROVEMENTS

In some cases, routine maintenance and replacement of identified equipment is the most cost-efficient option. In other cases, a larger upfront investment for a new system could be a wiser option when considering total lifetime energy costs and efficiencies gained with system replacement. down the road. 163 COST ESTIMATION SUMMARY HVAC IMPROVEMENTS 164 HVAC IMPROVEMENTS COST ESTIMATIONS BY FACILITY WYDOWN MIDDLE SCHOOL WMS Replace existing equipment as prioritized in green on the building equipment schedule 2,500,000 $ to 3,000,000 $ Replace existing equipment as prioritized in yellow on the building equipment schedule 1,200,000 $ to 1,600,000 $ Replace existing equipment as prioritized in red on the building equipment schedule 4,000,000 $ to 4,500,000 $ Replace all existing system with a new energy efficient variable air volume system (VAV) System will include new condensing type boiler system, air handlers, chillers, electrical, piping, ductwork and BAS upgrade. 15,300,000 $ to 16,000,000 $ BUILDING SQUARE FOOTAGE: 279,549 CLAYTON HIGH SCHOOL CHS Replace existing equipment as prioritized in green on the building equipment schedule 2,300,000 $ to 2,800,000 $ Replace existing equipment as prioritized in red on the building equipment schedule 300,000 $ to 350,000 $ Replace all existing system with a new energy efficient variable air volume system (VAV) System will include new condensing type boiler system, air handlers, chillers, electrical, piping, ductwork and BAS upgrade. Existing boilers could be reused 7,800,000 $ to 8,200,000 $ BUILDING SQUARE FOOTAGE: 157,048

164 HVAC IMPROVEMENTS COST ESTIMATIONS BY FACILITY WYDOWN MIDDLE SCHOOL WMS Replace existing equipment as prioritized in green on the building equipment schedule 2,500,000 $ to 3,000,000 $ Replace existing equipment as prioritized in yellow on the building equipment schedule 1,200,000 $ to 1,600,000 $ Replace existing equipment as prioritized in red on the building equipment schedule 4,000,000 $ to 4,500,000 $ Replace all existing system with a new energy efficient variable air volume system (VAV) System will include new condensing type boiler system, air handlers, chillers, electrical, piping, ductwork and BAS upgrade. 15,300,000 $ to 16,000,000 $ BUILDING SQUARE FOOTAGE: 279,549 CLAYTON HIGH SCHOOL CHS Replace existing equipment as prioritized in green on the building equipment schedule 2,300,000 $ to 2,800,000 $ Replace existing equipment as prioritized in red on the building equipment schedule 300,000 $ to 350,000 $ Replace all existing system with a new energy efficient variable air volume system (VAV) System will include new condensing type boiler system, air handlers, chillers, electrical, piping, ductwork and BAS upgrade. Existing boilers could be reused 7,800,000 $ to 8,200,000 $ BUILDING SQUARE FOOTAGE: 157,048 Replace existing equipment as prioritized in green on the building equipment schedule 160,000 $ to 190,000 $ Replace existing equipment as prioritized in yellow on the building equipment schedule 190,000 $ to 220,000 $ Replace existing equipment as prioritized in red on the building equipment schedule 2,900,000 $ to 2,000,000 $ Replace all existing system with a new energy efficient variable air volume system (VAV) System will include new condensing type boiler system, air handlers, chillers, electrical, piping, ductwork and BAS upgrade. Existing boilers could be reused 3,800,000 $ to 3,500,000 $ 165 Replace existing equipment as prioritized in yellow on the building equipment schedule 180,000 $ to 210,000 $ Replace existing equipment as prioritized in red on the building equipment schedule 2,400,000 $ to 2,200,000 $ Replace all existing system with a new energy efficient variable air volume system (VAV) System will include new condensing type boiler system, air handlers, chillers, electrical, piping, ductwork and BAS upgrade. Rooftop units could be used if building will accommodate 3,900,000 $ to 4,300,000 $ BUILDING SQUARE FOOTAGE: 60,415 BUILDING SQUARE FOOTAGE: 59,829 CAPTAIN ELEMENTARY SCHOOL CPT GLENRIDGE ELEMENTARY SCHOOL GLN

Existing boilers could be reused 3,800,000 $ to 3,500,000 $ 165 Replace existing equipment as prioritized in yellow on the building equipment schedule 180,000 $ to 210,000 $ Replace existing equipment as prioritized in red on the building equipment schedule 2,400,000 $ to 2,200,000 $ Replace all existing system with a new energy efficient variable air volume system (VAV) System will include new condensing type boiler system, air handlers, chillers, electrical, piping, ductwork and BAS upgrade. Rooftop units could be used if building will accommodate 3,900,000 $ to 4,300,000 $ BUILDING SQUARE FOOTAGE: 60,415 BUILDING SQUARE FOOTAGE: 59,829 CAPTAIN ELEMENTARY SCHOOL CPT GLENRIDGE ELEMENTARY SCHOOL GLN Replace existing equipment as prioritized in yellow on the building equipment schedule 400,000 $ to 500,000 $ Replace existing equipment as prioritized in red on the building equipment schedule 200,000 $ to 300,000 $ Replace all existing system with a new energy efficient variable air volume system (VAV) System will include new condensing type boiler system, rooftop units, electrical, piping, ductwork and BAS upgrade. 900,000 $ to 1,200,000 $ 166 Replace existing equipment as prioritized in green on the building equipment schedule 160,000 $ to 190,000 $ Replace existing equipment as prioritized in yellow on the building equipment schedule 90,000 $ to 110,000 $ Replace existing equipment as prioritized in red on the building equipment schedule 3,000,000 $ to 2,900,000 $ Replace all existing system with a new energy efficient variable air volume system (VAV) System will include new condensing type boiler system, air handlers, chillers, electrical, piping, ductwork and BAS upgrade. Existing boilers could be reused 3,900,000 $ to 4,400,000 $ BUILDING SQUARE FOOTAGE: 61,401 BUILDING SQUARE FOOTAGE: 14,000 MERAMEC ELEMENTARY SCHOOL MER ADMINISTRATIVE CENTER ADMIN