| 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