Tinker Air Force Base, Honeywell partner in $80 million heating system - Article Photos 2/7

A boiler door is shown on the heating system at Tinker Air Force Base. Base officials held a ceremony and tour of Tinker's heating system Tuesday. The base in August awarded an $80 million contract to Honeywell to build a new, more efficient heating system. Photo By David McDaniel, The Oklahoman David McDaniel - The Oklahoman