| Compatible Duct Diameter | : | 8 in |
| Insulated | : | Yes |
| Material | : | Metal |
| Mounting Type | : | Ceiling |
| Register Opening Length | : | 12 in |
| Register Opening Width | : | 4 in |
| Series | : | 3608FS Series |
Gray Metal Slant Top Box, 3608FS Series, Compatible Duct Diameter: 8 in, 12 in Register Opening Length, 4 in Register Opening Width, Metal, Insulated: Yes, Ceiling Mounting
- Insulated supply or return boxes save time and money. The slant design allows easy installation in ceilings. The round connection on the back with straight through airflow design. Equivalent length supply 35' equivalent length return 10'