# What Size Dehumidifier Do You Need?

> Square footage is only half the answer. Here’s how to match pints to your space — and how dampness changes everything.

Canonical: https://www.enthusiastreview.com/guides/dehumidifier-size-guide/
Last updated: 2026-11-05
Published: 2026-09-16
Category: Buying Advice
Publisher: Enthusiast Review

**What size dehumidifier do I need?** It’s the first question nearly every shopper asks, and the honest answer depends on two things: how big the space is and how damp it really is. A 1,000-square-foot basement that just smells a little musty needs far less capacity than the same basement with water seeping through the walls after every storm.

There’s a second trap, too. In 2019 the Department of Energy changed how dehumidifiers are rated, and every number on the box dropped — even though the machines didn’t get any weaker. Compare an old “70-pint” unit to a new “50-pint” and you may be looking at nearly the same capacity.

Below you’ll find a sizing chart that combines square footage and dampness, a simple calculator you can do in your head and the adjustments that charts usually leave out.

## Products in this guide

- **Best mid-size pick:** Midea Cube 35 — [check price on Amazon](https://www.amazon.com/dp/B0GL7QLD49?tag=sktiger-20&linkCode=ll1)
- **Best for basements:** Midea Cube 50 — [check price on Amazon](https://www.amazon.com/dp/B0GL7B1FC8?tag=sktiger-20&linkCode=ll1)
- **Best for crawl spaces:** AlorAir HDi65 — [check price on Amazon](https://www.amazon.com/s?k=AlorAir%20Sentinel%20HDi65%20Dehumidifier&tag=sktiger-20)

For most damp basements and large main floors, the **Midea Cube 50** is our go-to: 50 pints a day under the current DOE test, with an oversized bucket.

## 1. Midea Cube 35-Pint Dehumidifier — Best mid-size pick

[Check price on Amazon](https://www.amazon.com/dp/B0GL7QLD49?tag=sktiger-20&linkCode=ll1)

**Pros**

- Right-sized for a large room or small apartment
- Folding bucket empties less often than a standard tank
- App and voice control hold a set humidity

**Cons**

- Too small for a wet basement
- Pricier than basic 35-pint boxes

**Why we picked it:** It fills the gap between bedroom-sized and basement-sized machines, which is exactly where many living rooms, family rooms and small apartments land.

**Performance:** Rated at 35 pints a day under the 2019 DOE test, it suits roughly 500 to 1,500 square feet in moderately to very damp conditions. Its humidistat holds a set percentage, so it cycles off once the room reaches your target.

| Spec | Value |
| --- | --- |
| Capacity | 35 pints/day (DOE 2019) |
| Humidistat | Digital, set % target |
| Smart control | App and voice |
| Best for | 500–1,500 sq ft, damp |

## 2. Midea Cube 50-Pint Dehumidifier — Best for basements

[Check price on Amazon](https://www.amazon.com/dp/B0GL7B1FC8?tag=sktiger-20&linkCode=ll1)

**Pros**

- 50 pints a day under the current DOE test
- Oversized 4.35-gallon bucket
- Compact for its capacity

**Cons**

- No pump on the standard version
- More than a single bedroom needs

**Why we picked it:** Fifty DOE pints is the right capacity for most damp basements and large main floors, and the big bucket means fewer trips to empty it.

**Performance:** It handles about 1,500 to 3,000 square feet that run very damp to wet. If your drain is above the unit, choose a pump model instead. Our [best 50-pint dehumidifier](https://www.enthusiastreview.com/best/best-50-pint-dehumidifier/) guide compares alternatives.

| Spec | Value |
| --- | --- |
| Capacity | 50 pints/day (DOE 2019) |
| Bucket | 4.35 gallons |
| Drainage | Bucket or gravity hose |
| Best for | 1,500–3,000 sq ft, very damp |

## 3. AlorAir Sentinel HDi65 Dehumidifier — Best for crawl spaces

[Check price on Amazon](https://www.amazon.com/s?k=AlorAir%20Sentinel%20HDi65%20Dehumidifier&tag=sktiger-20)

**Pros**

- Built to run continuously in cold, tight spaces
- Built-in pump and duct options
- 55 pints a day (AHAM)

**Cons**

- Commercial pricing
- Overkill for living spaces

**Why we picked it:** For a crawl space or a whole wet basement, a standard portable pushed past its limits won’t last. This unit is designed for exactly that job.

**Performance:** AlorAir rates it at 55 pints a day under AHAM conditions and 120 at saturation, with a pump and ducting options for spaces you can’t walk into. The Wi-Fi HDi65S variant is worth comparing. See our [best crawl space dehumidifier](https://www.enthusiastreview.com/best/best-crawl-space-dehumidifier/) guide.

| Spec | Value |
| --- | --- |
| Capacity | 55 pints/day (AHAM) |
| Type | Commercial compressor |
| Drainage | Built-in pump |
| Best for | Crawl spaces, wet basements |

## Dehumidifier size chart: square footage × dampness

Find your square footage across the top and your dampness down the side. Capacities are current DOE 2019 pint ratings.

| Condition | Up to 1,000 sq ft | 1,000–2,000 sq ft | Over 2,000 sq ft |
| --- | --- | --- | --- |
| Moderately damp (musty smell, no visible moisture) | 20–25 pints | 25–30 pints | 30+ pints |
| Very damp (condensation on walls, pipes or windows) | 25–30 pints | 30–40 pints | 40+ pints |
| Wet (seepage or standing water) | 30–40 pints | 40–50 pints | 50+ pints |

*Based on widely used AHAM and ENERGY STAR sizing guidance, converted to DOE 2019 ratings.*

> **Past what a portable can handle:** Flood cleanup, standing water on a slab or a crawl space that seeps after every rain calls for an industrial-size LGR dehumidifier. See our [best commercial dehumidifier](https://www.enthusiastreview.com/best/best-commercial-dehumidifier/) picks.

## A quick dehumidifier size calculator

1. **Measure the space.** Multiply length by width. Add connected rooms if there’s no door between them.
2. **Rate the dampness.** Musty only = moderately damp. Beading on walls or windows = very damp. Seepage or puddles = wet.
3. **Read the chart.** Find your row and column above.
4. **Adjust for ceilings.** If ceilings are higher than 8 feet, move up one tier.
5. **Adjust for moisture sources.** A laundry room, hot tub or shower nearby? Move up one tier.
6. **Between sizes?** Choose the larger one, as long as it has a humidistat that switches off at your target.

Example: a 1,200-square-foot basement with condensation on the foundation walls lands at 30–40 pints. With a dryer venting into the space, move up to a 50-pint unit.

## Dehumidifier sizes by room

| Space | Typical size | What to buy |
| --- | --- | --- |
| Closet, safe, small bathroom | Under 100 sq ft | Mini thermoelectric or renewable desiccant |
| Bedroom or office | 100–500 sq ft | 20–22 pints |
| Living room, small apartment | 500–1,500 sq ft | 30–35 pints |
| Basement or large main floor | 1,500–3,000 sq ft | 50 pints, pump if needed |
| Crawl space or whole wet basement | Any size | Commercial unit (55+ pints AHAM) |
| Whole house | Any size | Ducted whole-home unit |

Mid-size electric minis such as the Eva-Dry EDV-2400 add a built-in humidistat but remove only a small amount of water — fine for a closet or bathroom, not a bedroom. For whole-home systems, size by square footage and duct capacity instead; see our [best whole-house dehumidifier](https://www.enthusiastreview.com/best/best-whole-house-dehumidifier/) guide.

## Why dehumidifier sizes changed in 2019

Starting in June 2019, the DOE moved its official test from an 80°F room to a 65°F room to better reflect real basements. Cooler air holds less water, so every model’s rated capacity dropped — the hardware didn’t change, only the label.

| Old rating (pre-2019) | Roughly equivalent DOE 2019 rating |
| --- | --- |
| 30 pints | About 20–22 pints |
| 50 pints | About 35 pints |
| 70 pints | About 50 pints |

*Approximate; check each model’s current DOE rating.*

Some brands still headline capacity under hot, saturated conditions (often 95°F and 90% humidity or more), which inflates the number further. Always compare DOE to DOE. For the mechanics behind those ratings, see [how does a dehumidifier work](https://www.enthusiastreview.com/guides/how-does-a-dehumidifier-work/).

## How to size a dehumidifier: the adjustments charts miss

- **Ceiling height:** Charts assume 8-foot ceilings. Vaulted rooms hold more air per square foot, so size up a tier.
- **Open floor plans:** Treat connected spaces as one area. A unit can’t dry only the room it sits in when there’s no door.
- **Temperature:** Below about 60°F, compressor units remove less water; below about 41°F they start icing. Cold spaces need extra capacity or a desiccant.
- **Placement:** A correctly sized unit jammed into a corner underperforms. Follow our [where to place a dehumidifier](https://www.enthusiastreview.com/guides/where-to-place-a-dehumidifier/) rules.
- **Grow tents:** Plant count and growth stage matter more than floor area. See our [best dehumidifier for grow tent](https://www.enthusiastreview.com/best/best-dehumidifier-for-grow-tent/) guide.

## The bottom line

Decide how damp the space is before you look at square footage — the same 1,000-square-foot room can need anywhere from 20 to 40 pints. Compare current DOE ratings, adjust for ceilings and moisture sources and, if you’re between sizes, choose the larger unit with a good humidistat. Then set that humidistat to around 45–50%; our [humidistat settings guide](https://www.enthusiastreview.com/guides/dehumidifier-humidistat-settings-guide/) explains why.

## Frequently asked questions

### What size dehumidifier do I need for a 1,000 sq ft basement?

About 20–25 pints (DOE 2019) if it’s moderately damp, 25–30 pints if you see condensation and 30–40 pints if there’s seepage or standing water. See our [best dehumidifier for 1,000 sq ft](https://www.enthusiastreview.com/best/best-dehumidifier-for-1000-sq-ft/) picks.

### What size dehumidifier do I need for 2,000 square feet?

Usually 30–50 pints depending on dampness, or a ducted whole-home unit if the space is spread across multiple rooms. Our [best dehumidifier for 2,000 sq ft](https://www.enthusiastreview.com/best/best-dehumidifier-for-2000-sq-ft/) guide has specific picks.

### Is it better to size up or down on a dehumidifier?

Size up one step if you’re between two sizes. A slightly larger unit with a humidistat reaches the target and cycles off. Avoid jumping several sizes, which adds cost without benefit.

### Why is a new dehumidifier’s pint rating lower than my old one?

The DOE changed its test in 2019 from 80°F to 65°F. The same machine now earns a lower number — an old 70-pint unit is roughly a 50-pint unit today.

### How do I know if my space is damp, very damp or wet?

Damp: a musty smell but no visible moisture. Very damp: beading on windows, pipes or walls. Wet: visible seepage or standing water. A hygrometer reading above 60% confirms a problem.

### When do I need an industrial-size dehumidifier?

For flood cleanup, standing water, large warehouses or crawl spaces with constant seepage. Commercial LGR units are built to run continuously and pull moisture at lower humidity levels.

## Related guides

- [The Best House Dehumidifiers of 2026](https://www.enthusiastreview.com/best/best-dehumidifier/)
- [The Best Dehumidifiers for a 1,000-Square-Foot Space](https://www.enthusiastreview.com/best/best-dehumidifier-for-1000-sq-ft/)
- [The Best Dehumidifiers for 2,000 Sq Ft](https://www.enthusiastreview.com/best/best-dehumidifier-for-2000-sq-ft/)
- [Where to Place a Dehumidifier (and Where Not To)](https://www.enthusiastreview.com/guides/where-to-place-a-dehumidifier/)
- [The Best 50-Pint Dehumidifiers](https://www.enthusiastreview.com/best/best-50-pint-dehumidifier/)
- [How Does a Dehumidifier Work — and How Long Does It Take?](https://www.enthusiastreview.com/guides/how-does-a-dehumidifier-work/)

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*Enthusiast Review researches products against DOE ratings, ENERGY STAR data, manuals, CPSC recalls and owner reviews; it does not run a test lab. Amazon links are affiliate links (tag sktiger-20).*