How to Choose a Dehumidifier: Complete Buyer’s Guide (2026)
Quick answer
Choose a dehumidifier by the size and dampness of the area that shares air, then check its coldest room temperature and where the water will go. For a small, moderately damp room, start by comparing models rated for 20 to 30 pints per day. For a larger or persistently wetter space, consult the ENERGY STAR sizing guide and compare higher capacities. Pick a bucket you can empty, a gravity hose to a lower drain, or a pump rated for the rise to your drain.
1. Match capacity to dampness and the space that shares air
Measure the floor area you want to dry and take a few temperature and relative humidity readings with a separate hygrometer. Check the room during normal use and again after a wet spell or a laundry day. An open basement and two rooms separated by a closed door can have the same floor area and behave differently. The second room needs its own reading and a way for air to circulate.
For spaces under 2,000 square feet, ENERGY STAR suggests starting at 20 to 30 pints per day for slight to moderate dampness, 25 to 40 for very damp conditions and 30 to 50 for wet conditions. The ranges overlap because room size and moisture load both matter. Check the agency’s separate large-room guidance if you are sizing an open area over 2,000 square feet. Repair any leak or seepage before judging whether an appliance can maintain the room.
A pint rating describes the rate of water removal. The U.S. Department of Energy’s current portable rating conditions are 65°F and 60% relative humidity. Daily collection at home varies with the room temperature, moisture coming in and how long the unit runs. Bucket volume tells you how much water the tank holds before you empty it. An old model rated under the warmer 80°F test may have a higher number than a comparable current machine, so check the test basis when replacing one.
2. Work out where the water will go
- Bucket. Use it when you lack a suitable drain and can empty the tank regularly. Check the tank’s removal direction and the carrying path. The two models below stop dehumidifying when their buckets fill in bucket mode.
- Gravity hose. Choose this when the hose can run from the outlet to a lower drain without rising or kinking. Frigidaire recommends a drain hose at least ½ inch in diameter for gravity drainage on both examples. Consult your exact manual before buying a hose or assuming one comes in the box.
- Built-in pump. Measure the vertical rise and the full hose route to the intended drain. The FHDP6033W1 manual specifies a maximum of 16.4 feet (5 m) for the distance and rise. That limit belongs to this model. Test for discharge and leaks during the first pump cycle.
3. Check temperature, airflow and running cost
Use the coldest temperature the room reaches while you need the appliance. ENERGY STAR notes that frost can interfere with extraction as rooms cool below 65°F. Frigidaire’s manuals give both models below an operating temperature range of 41°F to 89°F. Near the low end, use your humidity trend to judge whether the machine keeps up. If your unheated garage drops below that range, look for equipment explicitly rated for those conditions. If you consider a desiccant unit for a colder room, compare the exact operating range, capacity test conditions and power use.
Leave space for air to enter and exit and for the bucket and filter to come out. For the examples below, allow at least 12 inches around the cabinet and follow the additional outlet clearance shown in the owner’s guide. Place the unit on a level floor that can support it with a full bucket. The compressor units shown here discharge warm air, which may matter in a room you are trying to cool. If cooling is the main job, see our guide to choosing an air conditioner.
Compare Integrated Energy Factor (IEF) on the same test basis. A higher IEF indicates more water removed per kilowatt-hour in the test. Your bill also depends on runtime, the moisture load and your electricity rate.
Two portable models for different drainage needs
These U.S. examples show how the same set of questions can lead to very different purchases. The capacities and features below are manufacturer specifications.
| Model | Pints per day | Drain options | Our fit |
|---|---|---|---|
| Frigidaire FHDD2234W1 | 22 | Front bucket or gravity hose | Moderately damp room with a workable bucket routine or a lower drain |
| Frigidaire FHDP6033W1 | 60 | Front bucket, gravity hose or built-in pump | High moisture load with a suitable drain above the unit |
Frigidaire FHDD2234W1 · 22 pints per day
Pros
- The 22-pint rating fits the lower end of the agency’s range for smaller rooms with moderate dampness.
- The front bucket and gravity outlet let you start with manual emptying and switch to a hose if a lower drain is available.
- At 33 pounds before water, it is easier to reposition than the 58-pound pump example.
Trade-offs
- There is no lift pump for a raised sink. Without a downhill path, plan on emptying the bucket.
- The smaller rated removal rate gives you less room for rising moisture loads in a wetter, open area.
Our recommendation
Start here for a measured humidity problem in one moderately damp room. Look at a larger capacity if the space stays wet after you address the moisture source, or a pump model if your only drain sits above the outlet.
Frigidaire FHDP6033W1 · 60 pints per day with pump
Pros
- The built-in pump can reach a suitable raised drain within the manual’s limits.
- The 60-pint rating suits a larger moisture load, and gravity drainage remains available if you later use a floor drain.
Trade-offs
- At 58 pounds before water, it takes more effort to move between floors.
- The pump starts at the full-bucket point and has a filter that needs regular cleaning. A little water in the bucket early in a cycle is expected.
Our recommendation
Consider it for a substantially damp, open basement where your drain sits above the unit. For a smaller space or an easy gravity route, compare a smaller-capacity model without a pump. See our dehumidifier comparison for additional capacity and drainage examples.
4. Check results in the first week
- Record a baseline humidity and temperature for the room. EPA recommends indoor relative humidity ideally between 30% and 50%, where practical. Start near the upper end and check a separate hygrometer after the unit settles into a routine.
- Confirm the bucket seats fully or the hose drains as intended. During gravity operation, check for pooling and verify that the hose still runs downhill. For pump operation, observe the first discharge after the bucket reaches its trigger level.
- Compare readings at similar times of day. If humidity remains high, check for a full bucket, blocked airflow, frost, a problem with the drain or a continuing source of moisture before buying a larger unit.
Frequently asked questions
Can I choose a unit by square footage alone?
Use floor area alongside dampness, room temperature and airflow. A mild humidity problem in an open room and persistent dampness behind closed doors call for different setups, even if the listed area is the same.
Will a continuous drain hose reach my utility sink?
Gravity drainage works when the hose can descend to the drain. If the sink connection is above the unit, check a pump model’s allowed rise and hose route against your measurements.
Can I replace an old 70-pint dehumidifier with a current 50-pint unit?
Check whether the older rating used the 80°F test. ENERGY STAR’s rough comparison puts an older 70-pint portable model near a current 40- to 45-pint model. Use that as context and size the replacement for your actual room and dampness.
Research method and sources
We reviewed federal test conditions, EPA moisture guidance and U.S. manufacturer pages and manuals on November 4, 2026. The room and model recommendations are our editorial judgments. We did not run hands-on extraction, noise or power tests. Amazon buttons open model-number searches. Check the full model code on the listing before buying.
- ENERGY STAR dehumidifier buying guidance and capacity test history.
- Federal dehumidifier test procedure, Appendix X1.
- EPA guidance on indoor humidity and moisture sources.
- Frigidaire FHDD2234W1 product details and owner’s guide.
- Frigidaire FHDP6033W1 product details, specification sheet and owner’s guide.
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