Quest Intake Duct Kit: Return Air Ducting for 6-Series Units
This kit lets you duct return air into a large Quest dehumidifier, so the unit can sit outside the grow space. It mounts on the intake side of the dehumidifier and carries the filters with it. The kit has two main parts, a duct adapter and a collar plate. The adapter measures 36.2 x 21.0 x 12.75 in and has its own filter door. The collar plate carries two 12 in round duct collars. Twelve #10 self-drilling screws and twenty-four standard #10 screws come in the box. Quest lists the kit for the Quest 506 (PN 4036600) and the Quest 506 277V (PN 4036610). It also fits the Quest 746 480V (PN 4037610), the Quest 876 (PN 4037600) and the Quest 706 50 Hz (PN 4041800). On a Quest 506, you can bring air in through both round collars. On the other listed models, rectangular duct attaches straight to the adapter. Duct is not included, and the filters come from the dehumidifier itself. Check your part number against this list before installing.
Installing a Dehumidifier Intake Duct
Disconnect the dehumidifier from power before you start. Remove both filters from the unit, since they move into the intake ducting. Attach the duct adapter to the unit with twelve screws. Use the standard #10 screws instead of the self-drilling ones if the cabinet already has holes. Open and remove the filter door on the adapter. Slide the filters into the intake ducting, then put the filter door back in place. For round duct on a Quest 506, screw the collar plate to the adapter with twelve screws. Then connect a round duct to each collar. For rectangular duct, attach it directly to the adapter. Give each dehumidifier its own dedicated duct system. Quest recommends a maximum duct run of 25 ft. Keep the run as straight as you can, since every bend cuts capacity and efficiency. The filter door keeps the filters reachable for service once the ducting is up.
Key Features
- Two-piece kit: Duct adapter with filter door, plus a collar plate.
- Two 12 in collars: Round duct option on the Quest 506.
- Rectangular option: Duct attaches straight to the adapter on other listed models.
- Hardware included: #10 self-drilling screws and standard #10 screws.
- Remote location: Lets the dehumidifier sit outside the grow room.
Technical Specifications
| Specification | Value |
|---|---|
| Brand | Quest |
| Part number | 4038642 |
| Type | Intake (return air) duct kit |
| Compatible models | Quest 506 (4036600), 506 277V (4036610), 746 480V (4037610), 876 (4037600), 706 50 Hz (4041800) |
| Duct adapter | 36.2 x 21.0 x 12.75 in, with filter door |
| Collar plate | 2 x 12 in round collars (round duct on Quest 506 only) |
| Hardware | 12 #10 self-drilling screws, 24 #10 screws |
| Recommended max duct run | 25 ft |
| Not included | Ducting; filters come from the dehumidifier |
| UPC | 859029004618 |