Project:

• 53,700 ft² Four-story Facility Plus Underground Parking Garage

Site Location:

• Seattle, WA

Team:

• Owner - Childhaven
• Architect - Miller/Hull Partnership
• GC - GLY Construction
• HVAC - PSF Mechanical, Inc.
• Electrical - Johnson Electric
• Fire Protection - Patriot Fire Protection

HVAC Systems:

• Two packaged York rooftop VAV variable air volume units with gas heat
• Fan powered terminal units with electric heat
• Type I and Type II kitchen exhaust hoods
• Server room split system
• Packaged heat pumps serving elevator machine rooms
• Elevator pressurization fans
• Garage exhaust system
• Alerton EMCS system

Energy Saving Strategies:

• EMCS optimal start scheduling of HVAC equipment
• High-efficiency HVAC equipment with gas heat
• ECM motors on terminal units
• Economizer control of rooftop units to provide “free” cooling with outside air
• VFDs on rooftop unit supply fans

System Benefits/Goals:

The Childhaven facility was constructed under the design/build concept which proved very beneficial to the owner by delivering a complex mixed-occupancy structure under a tight schedule. Severe space constraints due to height limits proved a challenge to the mechanical designer/installers. Special consideration was given to sound control which produced a quiet building both internally, and due to code restrictions, externally.