Iconergy partnered with Bromley East Charter School to improve building comfort, energy performance, and controls reliability through retro-commissioning and a BAS evaluation with prioritized upgrade recommendations.
industry
K-12
location
Brighton, Colorado
Solutions
Commissioning, Retro-Commissioning
Executive Summary
Iconergy provided comprehensive retro-commissioning and building automation system (BAS) assessment services for Bromley East Charter School (BECS) in Brighton, Colorado. Initial services were performed between 2015 and 2016 to evaluate existing HVAC systems prior to a major school addition, followed by a detailed BAS evaluation in 2022 to assess long-term system performance, reliability, and serviceability. Together, these efforts provided BECS with a clear roadmap to improve energy efficiency, comfort, controls reliability, and readiness for future capital improvements.
Facility Overview
Bromley East Charter School is a K–12 educational facility located in Brighton, Colorado. At the time of the initial retro-commissioning effort, the campus consisted of approximately 98,000 square feet of existing space with an additional 30,000 square foot expansion planned. The facility is served by a central hot water boiler plant, multiple rooftop air handling units, zone duct heating coils, variable air volume systems, and exhaust systems.
Scope of Services
- Retro-commissioning HVAC assessment of existing systems
- Functional testing and diagnostic evaluation of rooftop units and zone heating equipment
- Assessment of exhaust systems, kitchen hood, and hot water systems
- Review of mechanical, electrical, and controls issues relative to original design intent
- Building Automation System (BAS) evaluation and controls condition assessment
- Identification of BAS obsolescence, network limitations, and serviceability concerns
- Development of prioritized recommendations for system repairs, optimization, and upgrades
Building Automation System Evaluation Summary
In 2022, Iconergy performed a detailed BAS evaluation to assess the condition and performance of the school’s controls infrastructure. The evaluation identified that the existing Lonworks-based controls system was obsolete, difficult to service, and no longer supported by manufacturers. A combination of legacy Lonworks and newer BACnet controllers had been installed over time, creating a non-standard hybrid system. Iconergy provided detailed findings and a phased roadmap to migrate the school to a unified BACnet BAS, improve scheduling, correct sensor and actuator deficiencies, and reduce excessive equipment runtime.
Key Systems Evaluated
- Rooftop units (RTU-1 through RTU-11)
- Hot water boiler plant and distribution
- Zone duct heating coils and valves
- Variable air volume (VAV) systems
- Exhaust fans and kitchen hood systems
- Building automation system controllers, networks, and graphics
Project Highlights
- Retro-commissioning performed in advance of a 30,000 SF school addition
- Comprehensive HVAC and controls assessment for a 98,000 SF existing K–12 facility
- Evaluation and optimization of rooftop units, zone heating units, exhaust systems, and hot water systems
- Detailed BAS evaluation identifying operational, maintenance, and obsolescence risks
- Assessment of legacy Lonworks BAS and development of a roadmap to modern BACnet-based controls
- Identification of mechanical and controls deficiencies impacting energy use and occupant comfort
- Actionable recommendations to reduce energy consumption and long-term maintenance costs
- Services delivered in two phases: 2015–2016 RCx and 2022 BAS evaluation
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