A dehumidifier in a basement runs while the house is busy above it. A dehumidifier in a bedroom runs while you are asleep a few feet away, in a room with nothing else making sound. That changes which figure you read, which features matter and what counts as a flaw. A bucket alarm that nobody hears in a basement is the thing that wakes you at 3 a.m. upstairs.
Our guide to the quietest dehumidifiers compares the published figures and sorts real capacity from marketing capacity. Our basement guide sizes up for cool, wet spaces, with pumps and drains. This guide goes the other way. We read the owner's manuals for the small units from GE, Frigidaire and Danby, and the product pages for the rest, and ranked them on the hours when you are asleep: the figure at the low fan, the night mode, the display, and what happens when the bucket fills.
Our picks are listed above, with full specifications for each.
A bedroom at night is about as quiet as a home gets. The World Health Organization's community noise guidelines recommend less than 30 dB(A) in bedrooms during the night for a sleep of good quality. That figure is for the whole room. Our guide to setting up a quiet bedroom explains how to read maker figures against it, and why a machine running in a silent room is heard in a way it never is during the day.
No dehumidifier we found that names its fan speed publishes a figure near 30. The lowest low-speed figure from a maker that names its speed is 43 dBA, shared by the GE ADYR22LC and the Frigidaire FHDD2234W1. Neither maker states a measuring distance, so you cannot predict what your room will read. What you can do is compare the setting you will run at night.
That setting is low. Frigidaire's figures step from 43 dBA on low to 46 on medium and 49 on high. Roughly every 10 dBA sounds twice as loud, so the 6 dBA between low and high is a large gap in a quiet room, larger than the gap between most brands. GE's two figures sit closer together, 43 on low and 45 at maximum, which is why its high speed is the easiest to live with in the evening.
Danby's 48 dB and hOmeLabs's 38 dB come with no fan speed. They may describe low, or high, or something in between. We quote them as the makers print them and do not rank them against the labeled figures.
The figure on the box only helps if the unit stays at that setting. Some modes change the fan speed on their own, and a fan that speeds up at 2 a.m. is exactly what a bedroom does not need.
- Frigidaire's Quiet mode is the one we would use at night. The FHDD2234W1 guide says that in Quiet mode the unit will run in low fan speed for the whole time and sets a comfortable humidity by itself, and that the display will be off. That is the 43 dBA setting, held all night, with no light.
- Frigidaire's Auto mode is the factory setting. The guide says it will automatically set a comfortable humidity and fan speed. That is fine for the day, not for the night.
- GE's Smart Dry compares the set humidity level with the actual humidity and adjusts the fan speed automatically, in the manual's words. GE's own advice is to set the fan to Low when the humidity has been reduced and quiet operation is preferred. In a bedroom, choose Low yourself.
- Danby says its default is 40% humidity and high fan speed, and that the fan speed cannot be selected in Continuous or Comfort mode. To hold the low fan all night, use Set mode and press the fan button.
Compressor starts and stops
A dehumidifier has two sources of sound: the fan, which you choose, and the compressor, which turns itself on and off. When the room reaches the humidity you set, the compressor stops. When the air gets damp again, it starts. Each start is a change in sound, and in a silent room a change is easier to notice than a steady hum.
The manuals describe the pattern. Frigidaire says the compressor has an automatic 3 minute time delayed start if the unit is turned off and on quickly. GE describes a protective time delay of up to 3 minutes. Frigidaire's list of normal sounds includes rushing air, dripping water, a gurgling or hissing noise from refrigerant, and a high pitched chatter that today's high efficiency compressors may make. None of those is in the dBA figure.
There is a trade-off here. A continuous mode keeps the compressor running and avoids the stops and starts, but it runs all night whether the room needs it or not. A humidity setting lets the unit rest, but every restart is a sound. In a warm bedroom the frost cycle our basement guide describes is less likely: ENERGY STAR says frost can form on the coils when the air drops below 65°F, which describes a basement in winter more often than a heated bedroom.
When the bucket fills at 3 a.m.
Every unit here stops when its bucket is full. The difference is what it does to tell you.
- GE says an alarm will sound for about 10 seconds, and its Empty light blinks.
- Danby says the display will show P2 and the unit will beep 8 times. Its app also sends bucket full notifications.
- Frigidaire says the unit will shut down and the Bucket Full indicator will illuminate. The guide describes no alarm.
- hOmeLabs says an indicator light will let you know when it is full.
Bucket size decides how likely this is. GE's ADYR22LC holds 7 pints. At its full rated 22 pints a day, that is less than 8 hours of running. A bedroom in ordinary conditions will collect less than the rated figure, so treat that as the worst case. Frigidaire's bucket holds 1.7 gallons, which is 13.6 pints, nearly twice as much. For a bedroom, the simplest habit is to empty the bucket at bedtime, whichever unit you buy.
There is a second effect. When the unit stops, the room goes quiet, and some light sleepers notice silence as much as sound. When you empty the bucket in the morning, Danby says the unit then needs a 3 minute wait before restarting.
Display lights
A dehumidifier's display shows the room humidity, and most stay lit. In a dark bedroom that can matter as much as a few decibels. Our bedroom hub covers the same problem for purifiers, fans and air conditioners.
Of the manuals we read, only Frigidaire's describes a dark display: it is off in Quiet mode, and also in Auto and Fan modes. GE's manual describes the humidity display, the fan speed lights and an Empty light that blinks, and no way to dim them. Danby's lists lights for the timer, the mode, the fan speed, the filter and the Wi-Fi connection, and no dimmer. hOmeLabs's product page does not say. If your unit has no dark setting, turn the control panel away from the bed.
Bucket or continuous drain in a bedroom
A drain hose means you never empty a bucket, and a bucket that never fills never beeps. But every gravity drain here needs somewhere lower to go. GE says the garden hose must run down from the dehumidifier to the floor drain. Danby says any bends or upward motion in the hose will stop the water, and that the hose should be no more than 6 feet long. Frigidaire says you will need a garden hose and a drain nearby.
Most bedrooms have no floor drain. A bedroom next to a bathroom with a shower drain at floor level is the exception, and then a short hose across the threshold may work. Otherwise, plan on the bucket, and buy the biggest bucket you can.
Why a pump unit is overkill upstairs
A built-in pump solves the drain problem by pushing water up to a sink. That is why our basement guide ranks pump units first. In a bedroom the same machines cost you on noise.
The pump units in our catalog are all 50-pint machines, and they list higher low-speed figures than the 22-pint units: 47 dBA on low for the GE APYR50LC and 49 dBA for the Frigidaire FHDP5033Y1, against 43 dBA for the 22-pint GE and Frigidaire. The GE pump unit weighs 43 lb, against 28.7 lb for its 22-pint sibling. The pump also makes its own sound: Midea's Cube manual warns that the pump may generate a loud noise for the first 3~5 minutes of operation. No maker publishes a figure for the pump itself.
How much capacity a bedroom needs
ENERGY STAR's sizing table starts at a small to medium room, under 2,000 square feet. For slightly to moderately damp conditions, where a room feels damp and smells musty at times, it suggests 20 to 30 pints a day. For very damp conditions, with damp spots on walls or floors, 25 to 40 pints. It adds that it is better to oversize than undersize.
No public source we found sizes a unit for a single bedroom any more finely than that. Makers state generous coverage: GE lists 1,500 square feet for the ADYR22LC, Danby 1,500 for the DDR022BSWDB, and hOmeLabs 1,800 for its 8-pint unit. So for a bedroom, the 22-pint units are right-sized by ENERGY STAR's table, and nothing in it asks you to go bigger for an ordinary damp bedroom. The quiet argument points the same way: GE's 35-pint unit lists 46 dBA on low, 3 more than its 22-pint unit.
If you want ENERGY STAR's figure, the Frigidaire FHDD2234W1 is listed at 22.57 pints a day and the Danby DDR022BSWDB at 22.27, under the DOE test. We found no ENERGY STAR listing for the GE ADYR22LC or for the 8-pint hOmeLabs.
Placement in a bedroom
Hard floor, not carpet. Danby's manual says not to place the unit on carpeting, as this can block air flow, and warns that a surface that is not flat and sturdy could result in damage or excessive noise and vibration. GE asks for a smooth, level floor.
Leave space. GE asks for at least 18 inches on all sides. Frigidaire asks for a minimum of 12 inches and says the unit should not be operated in an enclosed small space like a closet.
Point the air away from the bed. The outlet blows warm, dry air. GE's discharges from the top grille and Frigidaire's from the side.
Close the door. GE, Frigidaire, Danby and ENERGY STAR all say to close doors and windows while the unit runs. A closed bedroom door also keeps the unit from drying the rest of the house.
The trade-offs
Low fan dries slowly. Frigidaire lists 97 CFM on low and 136 on high. Run high while the room is empty, and low or Quiet mode while you sleep.
The quietest-sounding claims come from small units. The 38 dB hOmeLabs removes 8 pints a day in warm test air. The 33 dB units in our parent guide remove about half a pint.
The GE may not stay on sale. GE's page data flags the ADYR22LC as obsolete.
Warranties are short. GE covers parts for a year and labor not at all, Frigidaire gives a year of parts and labor, and Danby two years.
New to the units? Read dBA explained. To see why a 43 from one brand and a 48 from another cannot be ranked, read why you cannot compare dB ratings across brands.
How we chose
We started from the units in our dehumidifier catalog and re-read each maker's product page, spec sheet and owner's manual. We ranked for a bedroom: the published figure at the low fan speed, whether a night mode holds that speed, whether the display can go dark, what the unit does when the bucket fills, and bucket size. We compared only figures from the same fan speed, and kept figures with no stated speed out of that ranking. We checked capacity against the ENERGY STAR dataset.
We did not measure any of these dehumidifiers, and we did not run them in a bedroom. Every noise figure here is the maker's own, quoted with the fan speed it describes where the maker gives one, and every feature we describe comes from the maker's manual or product page. Prices and stock are as the makers' sites showed them on the day we checked.
