Welltower (previously Health Care REIT) Office Building
See this project as featured in May/June 2013 issue of gb&d magazine. To maintain high degrees of power quality, the electrical system consists of two interior unit substations separating power usage between system types (one for building mechanical systems and lighting systems and one for building utilization loads). Harmonic mitigating transformers and automatic variable capacitor banks were used.
The lighting system design included high efficiency fluorescent, metal halide, and halogen lamps. The lighting was designed for comfort, aesthetics, and energy efficiency. The lighting control system includes daylight sensing controls on exterior spaces, occupancy controls, timed scheduled relay controls, and dimming functionality. The lighting control systems are integrated into the building automation system.
Audio visual systems were designed in five Conference Rooms, Board Room, Auditorium, Dining Room, Fitness Area, and social gathering spaces. The AV systems for each space include large flat panel displays and high quality sound reinforcement. Video transmission format in all spaces is digital using HDMI or DV protocol. The auditorium is outfitted with a HD 16×9 native format video projector providing 12,000 lumens. Conference Rooms include teleconferencing systems. Video conferencing systems are in the Board Room and two Conference Rooms.
A sound masking system was designed for the entire facility. Most spaces contain a plenum mounted masking system. In areas of aesthetic concern, that included drywall ceilings, in-wall speaker systems were used that are finished to appear like drywall. The sound masking system consists of a three channel non-coherent noise masking generator. This system provides even coverage without localization of sound sources.
The communications cabling system design entailed category-6A horizontal cabling and connecting hardware. Backbone cabling comprises the use of multi-pair copper as well as 50 micron multimode and single mode optical fiber. Communications Rooms are integrated with the use of equipment cabinets, UPS, network electronics, servers, and storage arrays. Horizontal (user) cabling is a converged system integrating with the client’s IP telephony system.
The security system provides intrusion alarm/monitoring with glass break detectors and door contacts. The system also provides IP-based LAN integration for local and remote PC monitoring and administration of the system. Access control system composes proximity card readers and integration with electric door hardware. Intercom, prox reader, and surveillance are all integrated at the underground parking garage entrance for overhead door control and entry identification.
Video surveillance includes IP-based cameras, including exterior cameras fed via fiber-optics. The design involved utilizing the existing surveillance cameras and integrating them into the system using H.264 video encoders to convert the analog video signals to digital IP-based for storage on the network video recorder (NVR). The NVR provides 7 TB of storage capacity and along with the cameras interconnected to a separate surveillance Ethernet switch with a connection to the LAN core switch for network monitoring of surveillance video.
The cooling system design consisted of two new 140 ton chillers, cooling towers, eight ice storage tanks, pumps, piping, and accessories. A plate and frame heat exchanger was installed to provide water side economizer when outdoor temperatures permitted. The primary chilled water loop is designed for variable flow.
Hot water heating system design involved four 2,500 MBH input gas fired high efficiency hot water condensing boilers, pumps, piping, and accessories. The primary heating water loop is designed for variable flow.
Design of the variable air volume systems encompassed two existing built-up units and one new air handling unit with chilled water and hot water coils providing varying quantities of cooled air through a system of ductwork to fan powered terminal units with hot water heating coils that control the temperature of the zones they serve.
A new Direct Digital Building Management System included schedules and controls for day-to-day operation of the building’s mechanical and lighting systems.