Quest 506 Duct Kit 4038641 | 12 in Collars, First Gen 506 and 277V

Which Side the Exhaust Duct Kit Actually Fits Part 4038641 is the exhaust kit, and the intake kit is a different part number. Matching by machine name alone is how people end up with the wrong side. Compatibility is narrow: the first generation 506 and the 506 277V specifically. Check the unit's own part number first, because a later generation 506 is not covered. The kit itself is two pieces plus fixings: a duct adapter, a collar plate and screws. The collar plate carries 12 in round collars, and the kit measures 27.57 in by 21.5 in by 4 in. What it gives you is the ability to put the dehumidifier outside the canopy space entirely. That takes the compressor heat, the noise and the footprint out of the room while the air still gets dried. Static Pressure and Duct Runs Static pressure is the limit that decides whether a ducted install works or quietly underperforms. It must not exceed a quarter of an inch water gauge on this unit. It also needs a minimum of two twelve inch round ducts when either side is ducted, not one larger one. And it needs at least 4 ft of straight duct off the unit before any turn, which is the rule most installs break first. The 506 moves 1500 CFM at zero static on the 230 volt machine and 1350 CFM on the 277 volt version. Every elbow, every foot of flex and every grille eats into that, and flex duct costs far more pressure than rigid. Size the run to the pressure budget first and to the convenient route second. A unit fighting its ducting pulls the same power and removes less water, which shows up as a room that never quite dries. Nothing on the machine warns you about it either. Spend the extra on rigid duct and two clean bends and the accessory earns its money. Key Features Which side: Exhaust, as part 4038641 The other side: The intake kit has its own part number Fits: First generation Quest 506 and 506 277V Contents: Duct adapter, collar plate and screws Collars: 12 in round, two of them Kit size: 27.57 in by 21.5 in by 4 in Why duct it: Puts the dehumidifier outside the canopy space Pressure limit: A quarter of an inch water gauge Duct rule: Two twelve inch round ducts, and 4 ft straight before a turn Unit airflow: 1500 CFM at zero static on the 230 volt model Technical Specifications Specification Value SKU 4038641 Brand Quest Product A duct kit for the exhaust side Side of the unit Exhaust Intake equivalent A separate Quest part number, not this one Fits Quest 506 and Quest 506 277V, first generation Contents Duct adapter, collar plate, screws Collar size 12 in round Collar count Two Kit dimensions 27.57 in x 21.5 in x 4 in Maximum static pressure 0.25 in water gauge Straight duct required At least 4 ft before any turn Unit airflow, 230 V 1500 CFM at 0.0 in water gauge Unit airflow, 277 V 1350 CFM Unit capacity 506 pints per day