Client: Rosedale Green
Project: New Construction – Skilled Nursing Facility
General Contractor: Paric
Floor Area: 54,000 sf (two, two-story buildings)
Construction Schedule: October 2015-August 2016
Mechanical Construction Manager
Wiegmann was consulted about this project after the job had already been bid, was over budget and not likely to move forward. We bid an alternate HVAC system that satisfied all the owner requirements and brought the project in budget and buildable.
The original design, using individual Vertical Terminal Air Conditioners (VTAC) units for each resident room and dedicated outside air units to provide ventilated air at neutral temperature, did not take advantage of load diversity in the building. We were able to significantly reduce the required tonnage capacity and HVAC costs by more than 25% from the original design by using fewer rooftop Variable Air Volume (VAV) units per building and energy recovery units ducted directly to the return of the RTVs, using VAV boxes in lieu of VTACs and by eliminating the neutral air units.
The project also includes a Building Automation System so all devices can communicate with each other and operate effectively. The system provides monitoring and diagnostic capabilities for the owner.
- Two large Rooftop Variable Air Volume Packaged units per building
- Central exhaust ducted to exhaust fans in two energy recovery units per building
- Outside ventilation air was brought in through the Energy Recovery Units, preconditioned by an energy recovery wheel and then fed into the return ductwork of the Rooftop Units
- Medium pressure supply ductwork from the rooftop units fed VAV boxes with electric heating coils
- Direct Digital Controls
- Building Automation System