Save 16%

Phoenix D850 Portable Desiccant Dehumidifier (4034000)

List price: $14,200.00
You save: $2,310.00 (16%)
The Phoenix D850 provides the perfect blend of portability, versatility, and performance the restoration industry has been seeking in a medium capacity desiccant dehumidifier. It combines the wide operating range and ultra low grains of the Phoenix 1200 with the portability of an LGR. The included remote humidistat and process blower speed control allow you to tailor the drying to the task at hand. The D850 operates both vertically or horizontally and is perfect for low clearance applications, fitting inside most crawlspaces. The lower carrying handle makes moving the unit down stairs, as well as into and out of a crawlspace, a breeze.

The D850 delivers 850 CFM of ultra-low grain process air and removes a stunning 370 pints per day at AHAM conditions. The true four-hole design* allows for positive, neutral, or negative pressurization of the affected area. Three-hole desiccants** inherently pull unaffected and/or outside air into the drying chamber. Power to the unit is provided by either a 30 or 50 amp, 230 volt grounded power cord (both are included). The reactivation air stream is ducted through 6” flex duct, which is also provided with the unit.

* Having completely separate process and regeneration airstreams.
** Where regeneration airstream is pulled from the process airstream.


  • Ultra Low Grains or Max Water Removal
  • True Four Hole Desiccant
  • Operates Vertically and Horizontally
  • Runs on 208-240V, 50/60Hz, 50A or 30A
  • Small Size and Weight
  • Legendary Stainless Construction
  • Multiple Ducting Option


  • Water Removal AHAM:  370 Pints / 175 Litres / 46 Gallons per Day @ 80°F (27°C) and 60%RH
  • Processed Air:  805 CFM
  • Reactivation Air:  225 CFM
  • Operating Temperature Range:  -10° to 120°F  (-23° to 48.8°C)
  • Supply Voltage:  208-240 VAC, 50/60 Hz, Single Phase
  • Current Draw:  30 or 50 amp Branch Circuit Protection (24 or 40 amp Actual Amp Draw)
  • Power Cord:  2  8 ft (2.4 m) Power Cords (1 Dryer, 1 Range)
  • Air Filter:  MERV-11
  • Filter Sizes:  Process - 20” (50.8 cm) x 20”  (50.8 cm) x 2” (5 cm), Reactivation 9" (22.8 cm) x 11.375" (28.9 cm) x 1.75 " (4.4 cm)
  • Ducting Option (Process):  Inlet - 8 or 12” Flex Duct.  Outlet - 10” Layflat Collar
  • Ducting Option (Reactivation):  Inlet - 6” Flex Duct.  Required Reactivation Outlet - 6” Flex Duct
  • Unit Dimensions (W x H x D):  20" (51 cm) x 41" (104 cm) x 23.25" (59 cm)
  • Unit Weight:  105 lbs (47.6 kg)
  • Shipping Dimensions (W x H x D):  24" (61 cm) x 47" (119 cm) x 26" (66 cm)
  • Shipping Weight:  173 lbs (78.47 kg)
  • Housing:  Stainless
  • Xactimate:  WTRDHMD>
  • Product Code:  4034000

Product Application

When to use:

  • D850 is ideal for drying low evaporation materials such as concrete, brick, plaster, and hardwoods
  • D850 performs better in cooler temperatures (below 70°) than refrigerant dehumidifiers
  • D850 desiccant is sized for 2 ACH (class 2) for up to 25,500 cu.ft and up to 3 ACH (class 3 & 4) on 17,000 cu.ft

How to use:

  • Use Max Water when primarily drying the air
  • Use Max Grains when tenting or drying low evaporation materials
  • The unit can operate horizontally or vertically
  • Duct the reactivation outlet (225 CFM) outside the affected area or into refrigerant dehumidifier(s) with +350 CFM inlet

What's in the Box? 

  • Phoenix D850 Desiccant Dehumidifier
  • Remote Humidistat with 25 ft cable
  • Two 8 ft Power Cords
  • 18 inch and 12 inch Flex Ducts
  • Owner's Manual 

Manufacturer's Limited Warranty

One Year Warranty: Therma-Stor LLC warrants that, for one (1) year the Phoenix D850 dehumidifier will operate free from any defects in materials and workmanship, or Therma-Stor LLC will, at its option, repair or replace the defective part(s), free of any charge.

Auto Pump Out:
Dim Height:
41 inches
Dim Length:
20 inches
Dim Width:
23 inches
Hour Meter:
Stainless Steel
Max Power:
40 amps
Max. Airflow :
850 cfm
Max. Filter Stages:
Operating Range:
-10° to 120°F
Power Draw:
24 amps
Shipping Weight :
173 lbs
105 lbs


Dehu Type:
Water Removal AHAM :
370 pints/day

Product Spec Sheet (Phoenix-D850-Spec-Sheet.pdf, 1,966 Kb) [Download]

D850 Manual (Phoenix-D850-Manual.pdf, 2,444 Kb) [Download]

No posts found

Write a review