Mechanical only. work in an existing office space on floors 10-17. no change in use. work on floors 12 & 15 to include the replacement of ten (10) existing fan powered boxes in the same location with higher capacity boxes. upsizing the initial ductwork downstream of the box to accommodate the larger cfm output and adding a ceiling diffusers to accommodate densification on the floor. associated electrical work permitted separately. work on floors 10,11,13,14,16,17 to include the replacement of twelve (12) existing fan powered boxes in the same location with higher capacity boxes. upsizing the initial ductwork downstream of the box to accommodate the larger cfm output and adding a ceiling diffusers to accommodate densification on the floor. voltage to remain the same as existing on floors 10,11,13,14,16,17. ia construction, b-business occupancy (no electrical work under this permit)**conditional permit subject to field inspections**