Tankless water heater manufacturer Rinnai America Corporation and one of its dealers have completed Rinnai’s largest commercial project, and the project is fueled by propane.

Local airport parking and shuttle company, PreFlight Airport Parking, has converted three of its shuttle buses to propane autogas in an effort to save money and reduce its carbon footprint.

Eighteen months after MasterPark, a valet parking service at Seattle-Tacoma International Airport, converted 23 of its shuttle buses to propane autogas, the investment has already paid for itself.