An air handling unit was the cause of a commercial structure fire call at the Lehigh Valley Physician's Group office at 3080 Hamilton Blvd. Friday Februrary 27, 2015. The first alarm was dispatched at 1538 when an employee called 911 to report an odor of something burning as well as a light haze coming from the HVAC vents. Command was established by South Whitehall Fire Inspector John Frantz with a second alarm being called by Woodlawn Chief Rusty Held upon his arrival. Cetronia, Greenawalds and Woodlawn fire responded with additional units from Cetronia Ambulance Corps, Western Salisbury for Aerial 3131 and Alburtis Fire for their RIT.