Project Overview
First City Tower at 1001 Fannin is a 49 story high-rise building built in 1981.  The first 47 floors contain approximately 1,278,867 square feet of office area; Floor 48 & 49 contain approximately 26,331 square feet of storage area; the ground floor and the mall level (part of the downtown Houston pedestrian tunnel system) contain approximately 28,014 square feet of retail space. The scope of work consisted of an upgrade of the entire Building Automation System to Johnson Controls Metasys System Extended Architecture(MSEA) with an ADX Server.

Challenge
Convert the existing pneumatic Building Automation System over to full Direct Digital Controls(DDC) complete with electronic actuators, sensors, and controllers. This also includes conversion of their zone controls from pneumatic to full DDC to further improve efficiency.

Solution
Lange Mechanical Services, LP converted the existing pneumatic Building Automation System to full DDC with minimal disturbance to existing tenants. In addition to the conversion, an after-hours request system was initiated that the tenants can access via the internet. This also allows the building to issue bills and run reports based on tenant usage. This is all fully integrated into the Johnson Controls Metasys System.

Conclusion
Lange Mechanical Services, LP not only upgraded the existing building system from pneumatic operation to full DDC, but also provided additional tools for further energy monitoring and efficiency.

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Project Overview
16055 Space Center Boulevard is a 147,000 square foot, seven story high-rise building built in 1985.  This building was originally built as a NASA engineering facility. It is currently occupied by University of Phoenix and other tenants.  The scope of work consisted of an upgrade of the entire central plant including the replacement of two centrifugal chillers, cooling tower, all associated pumps, water specialties, associated chilled and condenser water piping and the upgrade of the plant automatic temperature control system.

Challenge
To upgrade the entire central plant located on the roof of the building without any interruption of service to the occupants; some of whom required 24/7 cooling while protecting the “ground to roof” glass atrium and the roof structure from any possible damage associated with the construction activities.

Solution
Lange Mechanical Services, LP provided a temporary, trailer mounted air cooled chiller with hoses routed up the exterior of the building to maintain chilled water until the new systems were completed and commissioned. All piping was prefabricated to allow easy material handling to the roof while hoists were in place to remove the old equipment.  The project was carefully pre-planned to minimize rigging and interference with tenant parking areas.

Lange contributed to the energy efficient and sustainable design of the building by supplying energy efficient magnetic, frictionless bearing chillers, variable volume pumps and an upgrade of the central plant automation using a Johnson Metasys building automation system. 

Conclusion
In partnership with Colliers International Property Management Services, Lange Mechanical Services, LP stayed on schedule, within budget and met the goals of the client.