Model A B C (inside grate) D E F Total Unit Depth
Small adjustable 27.5" min - 46" max 20" 7.5" 5" 4" 3-5.25" 19"
Medium adjustable 27.75" min - 46" max 22" 10.75" 5" 4" 3-5.25" 22"
Large adjustable 28" min - 46" max 24" 12" 5" 4" 3-5.25" 25"

*Vent Bar is 1 3/8" in height on all sizes

**Motor can be installed on the left or right side of the heater