Quest Dual 105 Overhead Dehumidifier, 105 Pints per Day, 120V, 4.9 A

Quest Dual 105 Overhead Dehumidifier: 105 Pints on 4.9 Amps

The Quest Dual 105 is an overhead refrigerant dehumidifier assembled by Quest in Madison, Wisconsin. It removes 105 pints of water a day at 80°F and 60 percent RH. At 75°F and 50 percent RH, it pulls 74 pints a day. Efficiency reaches 8.8 pints per kWh, an energy factor of 4.2 liters per kWh. It draws just 4.9 A and 530 W on a standard 110-120V circuit. Power comes through a 10 ft cord with a NEMA 5-15P plug. The blower moves 257 CFM at zero static pressure. With duct collars fitted, airflow holds at 206 CFM at 0.2 in WG and 146 CFM at 0.4 in WG. A MERV-11 pleated filter, 16 x 20 x 2 in, cleans incoming air before it reaches the coils. The cabinet measures 37.88 x 20.25 x 21.75 in and weighs 140 lb. It runs on R410A refrigerant and operates from 56 to 95°F. Quest rates it at 8.5 pints per kWh non-ducted and 9.0 ducted under California Title 24. The unit conforms to UL 60335-2-40 and carries a five-year warranty. Hanging it overhead keeps the floor clear for benches, trays and walkways.

Installing and Controlling the Quest 105 Dehumidifier

Hang the unit from structural members with steel hangers or straps, supported from underneath and never by its sides or ends. Quest's hanging bracket, part 4036668, is made for this job, and one unit takes two brackets. On the floor, raise the base 2.5 in above the drain pan so a P-trap fits, with a trap at least four inches deep. Condensate drains by gravity through the 3/4 in threaded NPT port, or through an optional condensate pump kit. The supply duct kit, part 4028607, accepts 10 in duct on both outlets. The return duct kit, part 4028610, accepts 12 in duct. Keep supply and return runs to 25 ft or less. The onboard dehumidistat dial runs from Dry, about 20 to 30 percent RH, to Humid, about 80 to 90 percent. Quest recommends the Normal setting, which holds about 50 percent RH. The unit starts when humidity rises to the dial point and stops when it falls 4 to 6 percent below. For external control, flip the switch to 24V mode and wire a control such as the Quest DEH 3000R to the terminal block. Contact between the 24V and DEHU terminals runs the fan and compressor, while 24V to FAN runs the fan alone. A FLOAT terminal accepts a normally closed float switch that shuts the unit off. Check the filter every six months and change it with every grow cycle, pulling it straight out from the end access panel.

Key Features

• 105 pints per day: At 80°F and 60% RH; 74 pints at 75°F and 50% RH.
• Low amp draw: 4.9 A and 530 W on 110-120V.
• 8.8 pints per kWh: Energy factor of 4.2 L/kWh.
• MERV-11 filter: 16 x 20 x 2 in pleated filter.
• Overhead or floor: Hangs from structural members with Quest brackets.
• Ductable: Supply kit for 10 in duct, return kit for 12 in duct.
• Two control modes: Onboard dial or external 24V control.

Technical Specifications