717 Market Street is a mixed use and retail building conversion to a mixed-use high-end residential loft and retail building.  TDE provided the MEP engineering design/build services for this residential conversion project located in San Francisco, California.  The development is comprised of a seven-story above grade building and a roof level rising to 101’-10”.  There is also one garage level below grade.  The change of use of the above grade floors produced 45 new affordable residential condominium units.  The project includes a common outdoor living space on the roof level. Daylighting controls, occupancy and photocell sensors, and a time-clock control system were designed to effectively control the lighting system and to save energy.    

The mechanical systems design supplements the passive systems at this site making them capable of meeting all space loads while minimizing visual and noise disturbances to the occupied spaces.  Heating is provided to the condo units by the use of low-profile radiant panel heaters while the retail and commercial spaces are provided by water source heat pumps.  Each condo unit has been designed with condenser water connections over the bathroom ceiling spaces providing each tenant with the option to upgrade their HVAC cooling package.  The existing cooling tower on the roof provides the condenser water.  By using heat pumps, the owner can utilize the existing equipment and avoid the installation of a central chiller plant.
Architect: AB Design Studio