This application is a standard industrial warehouse that has been transformed into a manufacturing facility. The plumbing system was designed with the typical shell building requirements with heavy office and logistics support locations added during the early construction phases. The efficiency of the Enterprise design team to mold this work in progress was evident by the success of the finished product and the completion on schedule

Enterprise Electrical and Mechanical, Inc. has been involved in the construction of fifty-three (53) Starbucks projects since September 2003. The projects are from South Bend, IN to as far South as Cincinnati. Although these are Plan and Spec Projects, our EEMC Team has been instrumental in helping with Mechanical and Electrical design changes that have reduced cost and maintained quality. If you have ever bought a cup of Starbucks Coffee at a location in Indiana, chances are EEMC was involved in the construction. For further information on any Starbucks Coffee project, please contact Jeff Nicholas, Director of Owner Direct Sales.

This application is a medical office space. The office space is served by a true RTU VAV system. There are three (3) packaged RTU’s that serve this facility. There are (91) VAV boxes with electric reheat coils in the air distribution system. The control system for the RTU and the VAV boxes is DDC. Each box has its own dedicated controller that directly controls the space temperature in its zone. A central controller communicates to the RTU’s via LON communications cards in each RTU. The central controller schedules the RTU’s and the box controllers between occupied and unoccupied modes. The user interface to the system is graphical via a desktop PC. Remote internet communications capability is used to allow communications from any PC that contains a web browser provided the user has the proper login and password data to access the system. Critical HVAC system alarms are monitored by the DDC system. These alarms are sent to the end user via email.

This application is an office space. The office space is served by a true RTU VAV system. There are three (3) packaged RTU’s totaling 335 tons of cooling that serve this facility. There are (120) fan powered VAV boxes with electric reheat in the air distribution system. Demand controlled ventilation as sensed by multiple CO2 sensors is employed to provide sufficient but minimum outside air to the space. This minimizes the energy required to condition this outside air while still ensuring the proper ventilation to the space under varying load conditions. The control system for the RTU and the VAV boxes is DDC. Each box has its own dedicated controller that directly controls the space temperature in its zone. A central controller communicates to the RTU’s via LON communications cards in each RTU. The central controller schedules the RTU’s and the box controllers between occupied and unoccupied modes. The user interface to the system is graphical via a desktop PC. Remote internet communications capability is used to allow communications from any PC that contains a web browser provided the user has the proper login and password data to access the system. Critical alarms are monitored by the DDC system on the building generator, sewage ejector system, and the de-watering pump system. These alarms plus the critical HVAC system alarms are sent to the end user via email.

Mechanical Project Manager: Brian Blom

This application is a medical office space. The office space is served by a true RTU VAV system. There are three (3) packaged RTU’s that serve this facility. There are (91) VAV boxes with electric reheat coils in the air distribution system. Medium pressure supply air duct system, utilizing a plenum return. Central exhaust system designed to meet future building needs of building. The control system for the RTU and the VAV boxes is DDC. Each box has its own dedicated controller that directly controls the space temperature in its zone. A central controller communicates to the RTU’s via LON communications cards in each RTU. The central controller schedules the RTU’s and the box controllers between occupied and unoccupied modes. The user interface to the system is graphical via a desktop PC. Remote internet communications capability is used to allow communications from any PC that contains a web browser provided the user has the proper login and password data to access the system. Critical HVAC system alarms are monitored by the DDC system. These alarms are sent to the end user via email.

This application is a medical office space. The office space is served by a true RTU VAV system. There are three (3) packaged RTU’s that serve this facility. There are (91) VAV boxes with electric reheat coils in the air distribution system. Medium pressure supply air duct system, utilizing a plenum return. Central exhaust system designed to meet future building needs of building. The control system for the RTU and the VAV boxes is DDC. Each box has its own dedicated controller that directly controls the space temperature in its zone. A central controller communicates to the RTU’s via LON communications cards in each RTU. The central controller schedules the RTU’s and the box controllers between occupied and unoccupied modes. The user interface to the system is graphical via a desktop PC. Remote internet communications capability is used to allow communications from any PC that contains a web browser provided the user has the proper login and password data to access the system. Critical HVAC system alarms are monitored by the DDC system. These alarms are sent to the end user via email.

This application is a long term intensive care medical facility. The space is served by a true RTU VAV system. There are three (3) packaged RTU’s totaling 375 tons of cooling that serve this facility. There are (100) VAV boxes with hot water (HW) reheat coils in the air distribution system. The differential pressure between four (4) isolation rooms and their adjacent corridor is controlled to maintain a negative pressure by a VAV exhaust fan (EF). Individual room pressure monitors indicate alarms if the room pressure becomes too positive. A central primary-secondary HW distribution system with two (2) HW boilers and four (4) pumps deliver hot water to each VAV box. Other miscellaneous EF’s are controlled by space temperature or on a time schedule. The control system for the RTU, the VAV boxes, the VAV EF, and other selected EF’s is DDC. Each box has its own dedicated controller that directly controls the space temperature in its zone. A central controller communicates to the RTU’s via a LON communications card. The central controller schedules the RTU’s and the box controllers between occupied and unoccupied modes. The user interface to the system is graphical via a desktop PC. Remote internet communications capability is used to allow communications from any PC that contains a web browser provided the user has the proper login and password data to access the system. Critical alarms are monitored by the DDC system on the VAV EF, the Isolation Room differential pressures, the generator when utility power is lost, and multiple medical gas system parameters. These alarms plus the critical HVAC system alarms are sent to the end user via email. Mechanical Project Manager: Brian Blom

This application is an office space. The office space is served by a true RTU VAV system. There are two packaged RTU’s that serve this facility. There are eighteen (18) VAV boxes with electric reheat in the air distribution system. The lobby VAV boxes have their own electric reheat coils at the boxes plus baseboard electric heat in the lobby. The box reheat coils and baseboard heat are staged to control the space temperature. The control system for the RTU and the VAV boxes is DDC. Each box has its own dedicated controller that directly controls the space temperature in its zone. A central controller communicates to the RTU’s via LON communications cards in each RTU. The central controller schedules the RTU’s and the box controllers between occupied and unoccupied modes. The user interface to the system is a back-lit LCD display. There is no internet communications capability on the current system, although it can be upgraded to include that capability.

This project is a warehouse with an office area. The warehouse is multiple rooftop units (RTU) controlled by programmable thermostats. The office area has two (2) constant volume (CV) RTU’s with a variable air volume (VAV) distribution system. There are twenty-two (22) VAV boxes total in the air distribution system. The VAV boxes and the RTU’s are controlled by a true zoning system. That is, the RTU’s see a CV while each zone sees a VAV. This system is a compromise between a true VAV system and a CV system. The zoning system has a lower first cost than the true VAV system but still provides individual zone control instead of a single zone control that a CV system provides. The energy savings are not as great as that of a true VAV system because the RTU supply fans do not unload. The zoning system is a direct digital control (DDC) system. Each VAV box has its own dedicated controller that controls the space temperature in its zone. A central control panel stages the heating and cooling capacity of the RTU’s and schedules the units between occupied and unoccupied modes. The user interface is a back-lit LCD display. There is no internet communications capability on the current system, although it can be upgraded to include that capability.