| Number of Tubes | Width with Manifold & Blower | Width without Manifold & Blower | Front Height | Rear Height | Depth | BTU per Hour (max) |
| 4 Tube | 23" | 13 1/2" | 18 1/2" | 14 1/2" | 16 1/2" | 48,000 |
| 5 Tubes (custom size) | 27" | 17.5" | 18 1/2" | 14 1/2" | 16 1/2" | 58,000 |
| 6 Tubes (custom size) | 31" | 21.5" | 18 1/2" | 14 1/2" | 16 1/2" | 68,000 |
| 7 Tubes (custom size) | 35" | 25.5" | 18 1/2" | 14 1/2" | 16 1/2" | 78,000 |
| 8 Tubes (custom size) | 39" | 29.5" | 18 1/2" | 14 1/2" | 16 1/2" | 88,000 |
| 9 Tubes (custom size) | 43" | 33.5" | 18 1/2" | 14 1/2" | 16 1/2" | 98,000 |
| 10 Tubes (custom size) | 47" | 37.5" | 18 1/2" | 14 1/2" | 16 1/2" | 108,000 |