Senior Housing

Sun Tower

Client/Architect: Environmental Works
Project Size: 95,000 sf


  • Utility Bill Analysis
  • Benchmarking
  • On-site Performance Assessment
  • Energy Metering
  • Model Calibration
  • Efficiency Measure Analysis

Sun Tower is a 200 unit, affordable senior living and assistance community located in the sunny heart of Washington State.  The developer and architect team, inspired by some of the work presented on the success of the Green Communities Project, engaged 360 Analytics to help identify and prioritize energy and water efficiency updates as part of a major renovation.  360 Analytics completed a site assessment, including a robust sampling of ventilation and water fixture flow rates.  Two years of energy, water, and solid waste utility bills were compiled, and degree-day regression models were developed to identify the heating, cooling, and base load energy flows.  Using the site measurements and energy monitoring data from past projects, the models were further refined to identify other end-use flows, such as elevators and hot water heating.  The analysis gave the owners and design team a better understanding how utility dollars were being spent, and is being used to prioritize retrofit funds. In addition, 360 Analytics design review led to identifying a suitable heat pump HVAC replacement option, available for a negligible additional cost over the electric resistance option.