How big is a dehumidifier?#
A portable home dehumidifier is a small floor unit, roughly 11 to 16 inches wide and 16 to 24 inches tall, while a ducted whole-home model is wider and squatter. The table below sorts the compact, standard, and crawl-space versions by footprint.
Dehumidifier dimensions by configuration#
| Configuration | Width (in) | Height (in) | Depth (in) | Best for |
|---|---|---|---|---|
| Compact dehumidifier | 11–15 | 16–20 | 8–12 | a bedroom or small basement |
| Standard dehumidifier | 14–16 | 20–24 | 11–14 | a full basement or living area |
| Whole-home crawl-space dehumidifier | 18–24 | 12–22 | 12–26 | a crawl space or a ducted install |
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Installation clearances for a dehumidifier#
- Air-intake clearance: 6–12 in in around a dehumidifier so it can draw damp air across the coil and exhaust it dry.
- Rear clearance: 6 in in behind a dehumidifier for the exhaust and the drain-hose barb.
- Drain slope: A dehumidifier either fills a removable bucket or drains continuously through a gravity hose or a small pump.
- Off-floor mount: A crawl-space dehumidifier often hangs from joists or sits on blocks so it stays above any standing water.
Will your dehumidifier fit? Clearances and door swing#
A dehumidifier moves air rather than swinging a door, so the space it needs is breathing room around the intake and exhaust. Leave 6 to 12 inches around the cabinet so it can draw damp air across the cold coil and blow it back out dry, and keep at least 6 inches behind for the exhaust and the drain-hose barb. Decide how it will empty: the unit either fills a removable bucket you dump by hand or drains continuously through a gravity hose or a small condensate pump to a nearby floor drain. For a crawl space, plan to hang the whole-home unit from the joists or set it on blocks so it stays above any standing water, and slope the drain line so it never backs up into the pan.
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Dehumidifier sizes by type: compact dehumidifier, standard dehumidifier, whole-home crawl-space dehumidifier#
The three formats match the space and the moisture load. A compact dehumidifier, 11 to 15 inches wide and 16 to 20 inches tall, handles a bedroom or a small basement and tucks into a corner. A standard dehumidifier grows to 14 to 16 inches wide and 20 to 24 inches tall — the common choice for a full basement or living area where it runs most of the season. The whole-home crawl-space dehumidifier is the odd one out: 18 to 24 inches wide but only 12 to 22 inches tall and up to 26 inches deep, built low and long to slide into a crawl space or tie into ductwork. Size it to the square footage and dampness, then confirm it fits the space it will live in.
Dehumidifier dimensions: common questions#
How big is a home dehumidifier?#
A portable home dehumidifier is 11 to 16 inches wide and 16 to 24 inches tall. A whole-home crawl-space unit is wider and lower, up to 24 inches wide and 26 inches deep.
How much clearance does a dehumidifier need for airflow?#
Give a dehumidifier 6 to 12 inches of open space around it and at least 6 inches behind, so it can pull in damp air and exhaust dry air without recirculating. Pushing it into a tight corner cuts its capacity.
How tall is a standard dehumidifier?#
A standard dehumidifier stands 20 to 24 inches tall. That is taller than a compact bedroom unit at 16 to 20 inches but still a portable floor appliance.
Can a dehumidifier drain continuously?#
Yes. Most dehumidifiers accept a gravity drain hose, and many pair with a small pump to lift condensate to a sink or floor drain, so you never empty a bucket. Continuous drainage is the norm for basement and crawl-space use.
How deep is a dehumidifier?#
A portable dehumidifier is 8 to 14 inches deep, while a crawl-space model runs much deeper at 12 to 26 inches to house the larger coil and blower.
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