Best Dehumidifier By Room Size

Thanks for taking the time to read our article on the best dehumidifier by room size. It is fair to say that most people will know when they need to buy a good dehumidifier. Almost always it is because they have realized there is too much moisture in the air.

The air in the room will feel heavy and humid, and there may be the first signs of mold starting to appear. The biggest problem for most people is knowing what size of a dehumidifier to buy. In reality, most people buy one that is simply too small, and then spend a lot of time constantly emptying the dehumidifier.

In this article we explain the importance of room size. We also take the time to recommend the best dehumidifier for a range of room sizes. Hopefully that will make life a great deal easier for you.

picking a dehumidifier against room size

How to Quickly Measure a Room Size

When buying a dehumidifier, it is important to measure the room. Dehumidifiers are usually sold to clear rooms measured in square feet. The easiest way to do this is simply to measure the length and breadth of the room in feet, and then multiply those two numbers together.

So for example a 12 foot long room by 13 feet wide would be 156 square feet, a 20 foot long room that is 18 foot wide would be 360 square feet.

We have shown another example in the diagram below.

how to measure a room for a dehumidifier

Odd Shaped Rooms

As you will know, not all rooms are perfect shapes. There can be walls with slopes, areas that jut out and partially enclosed rooms. All you can really do here is a best guess. You are trying to get an indication of room size, rather then a highly accurate measurement.

Ceiling Height

Most ceiling heights will be 8 feet. With newer homes builders are going for 9 feet ceilings. The only time you really need to think about ceiling height is if your home has unusually high ceilings, and usually more than 9 feet.

Dehumidifiers should really be measured by the cubic foot rating. (Length x Breadth x Height). As ceilings are a standard height, this is then measured in square feet. However, if you have very high ceilings then you should get a bigger dehumidifier.

That will allow for extra capacity. As an example, if you had a very high ceiling and were going for a 20 pint dehumidifier to clear that room, then you should really get a 30 pint one, that will allow for the increased cubic space.

Best Dehumidifier for a Room up to 199 Square Feet

Any room under 199 square feet is classed as a small room when it comes to buying a dehumidifier. The one that we would recommend would be Afloia Electric Home Dehumidifier.

This will quickly and efficiently remove moisture from rooms up to 200 square feet. The capacity of the water tank is 700 ml or 24 ounces

This small compact dehumidifier can absorb up to 300 ml or 11 ounces of moisture per day.

This is a quiet unit so a good choice for many rooms.

Best Dehumidifier for a Room 200-299 Square Feet

For a room size of under 300 square feet we would recommend would the Ivation 13 pint small area desiccant dehumidifier

Buyers like this option as the brand is well known is a very efficient unit that can quickly remove moisture, odors ​and gently warm the air.

It is very quiet so great for smaller rooms up to about 270 square feet and also for boats and laundry rooms especially.

There are plenty of features such as humidity adjustment, fan speed, ta timer, sleep mode, and vent swing.

The tank can hold up to ½ gallon of water (4 pints)

It also has a continuous drainage option which if connected up can save you a lot of time emptying the tank.

It also has a carry handle, a washable filter, various alerts and auto switch off if the tank gets filled.

Best Dehumidifier for a Room 300-799 Square Feet

At this point you are starting to get into the larger rooms and you will need a larger and more powerful dehumidifier.

We recommend the Hisense 30 pint dehumidifier. The manufacturer states that this unit can handle rooms up to 1,000 square feet.

It is easy to set up and use thanks to a one touch operation. It also comes with an easy to clean filter

The unit has a slide out bucket to empty any collected water, and there is also an indicator that avoids overflows and lets you know to empty the bucket

Best Dehumidifier for a Room 800-1499 Square Feet

This dehumidifier is suitable for rooms from 800 to 1500 square feet. This dehumidifier can remove up to 22 pints from the air each day

It is Energy Star certified and perfect for medium to large sized rooms

This dehumidifier has built-in wheels and handles as well as a quiet fan that will do its job without you hearing it

You can adjust the moisture setting, land let it run its continuous 24-hour cycle until the tank is full, where it'll then shut-off automatically.

There is also a useful drain hose outlet for continuous draining

This dehumidifier helps reduce odors and allergens by removing bacteria from the humid air.

The Turbo mode increases the fan speed from Normal Air CFM 129 (cubic feet per minute) to High Air CFM 138 for maximum moisture removal and odor reduction

Measures 16.1 x 10.4 x 19.9 inches, and has a 1 gallon water tank capacity, that removes up to 22 pints of moisture from the air per day.

Best Dehumidifier for a Room 1,500 Square Feet and Above

For larger rooms, you do need the larger dehumidifiers. Typically these are classed as 50 and 70 pint dehumidifiers. There are lots of these on the market.

The one that we recommend is the hOmeLabs 4,500 Sq. Ft Energy Star Dehumidifier. This model gets excellent buyer reviews, and is around the average price for this type of dehumidifier.

It can remove up to 50 pints from the air per day

It comes with wheels and handles, and also has a very quiet fan

It also comes with a solid 2 year warranty

There’s also a drain hose outlet for continuous draining.

It has a 1.8 gallon water tank capacity, and removes up to 50 pints of moisture from the air per day

Room Size Dehumidifier Buying Guide

Hopefully the information we have provided above gives you a good indication of how to match the best dehumidifier, depending on the size of your room. 

We did however also want to mention that the "humidity" in the air also plays an important factor. Where there is very high humidity, clearly more water will be removed from the air. That means the tank or reservoir will fill up quicker, and will need to be emptied on a more regular basis.

Where that is the case it may be a very good idea to buy a slightly bigger dehumidifier that you need just simply based on room size. Something like a 30 pint dehumidifier covers most small to medium sized rooms, where humidity is higher than usual.

We would however highly recommend fitting some pipe for a continuous flow, as this takes away the annoying task of having to empty a full tank.

General Room Size Dehumidifier Guide

Many of our readers want something very quick and easy to understand. Just below you will see a quick reference guide, if you want to keep your dehumidifier selection really simple.

If you follow this simple guide, you will not go too far wrong.

Room Size

Dehumidifier Size

0-1,500 Square Feet

20-25 Pints

1,500-3,000 Square Feet

35-40 Pints

3000-4,500 Square Feet

50-70 Pints

Whole House Dehumidifiers

We are asked often when should someone opt for a whole house dehumidifier? It is a good question, though it does depend on a few factors and can get complicated. A very good rule of thumb however, is to buy a dehumidifier for a space larger than 2,500 square feet. Something like a 50-70 pint will do that job really well.

They are more expensive than a standard dehumidifier. If this is something that you think you need, we would recommend talking to an expert and getting their advice. Some of these can form part of your heating or air conditioning system.

They can be customized to your needs and properly set up. 

You can also buy a stand alone whole house dehumidifier. Those can be effective up to about 3,000 square feet. After that size, dehumidifiers are not really that effective. At that stage you would be better concentrating on fitting several in the real problem areas.

Desiccant vs Refrigerant Dehumidifiers for the Home

There are two main types of dehumidifiers that are used in the home and these are:

  1. Desiccant - These are quiet. They will have have a lower capacity rating than refrigerant models. That said they are a great deal more efficient in lower temperatures. Under 65 °F (18 °C)
  2. Refrigerant - These are a better choice if the space is hot and very humid. They have a higher capacity rating and operate better at higher temperatures.

Most people will opt for a refrigerant model as these are more efficient. We would strongly recommend adding a hose to these through the drain port. If you don't do that then you will need to empty the bucket regularly, and in all honesty, that becomes a bit of a chore.