RenewAire renovation took place within a pre-existing sports facility. Final build-out consisted of 37,000 square-feet of office and light manufacturing spaces. Office spaces are located on ground floor and a partial mezzanine. Facility was first in the Midwest to be dual-certified through LEED (Silver) and Green Globes (Two Globes). Energy use has consistently scored in the upper 80th percentile of Energy Star for the first five years of occupancy. Green upgrades are simple, inexpensive, and readily available. They include low lighting power density combined with occupancy sensors controlling some lights, high-efficiency ozone-friendly cooling system, high-efficiency furnaces, and air-to-air energy recovey with RenewAire units. Green upgrades added less than 3% to the construction cost and, based on documented energy savings, actually reduced total cost for the owner from the very first day of occupancy: zero payback period.