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DeLonghi DE400P

alaTest has collected and analyzed 164 reviews of DeLonghi DE400P. The average rating for this product is 2.6/5, compared to an average rating of 4.0/5 for other Air Conditioning for all reviews. Reviewers are impressed by the size and design. The performance and usability are also appreciated, but there are some mixed comments about the noise. The energy efficiency and price get critical comments.

usability, performance, design, size

reliability, price, energy

On average, users rate this product 51/100.

Review analysis

(Based on 164 reviews)

User Reviews  

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Consumer review ( review summary for DeLonghi DE400P


alaTest has collected and analyzed 148 user reviews of DeLonghi DE400P from The average user rating for this product is 2.5/5, compared to an average user rating of 3.9/5 for other Air Conditioning on Reviewers really like the size and design. The performance and usability are also appreciated, but many are negative about the energy efficiency and price.

noise, usability, performance, design, size

reliability, price, energy

33% of the reviews on give this product a positive rating.

This summary is based on the products: DeLonghi DE400P Energy-Star 40-Pint Dehumidifier with PumpDeLonghi DE400P Energy-Star 40-Pint Dehumidifier with Pump

May, 2018

Consumer review (

Nice enough unit but the control system disappoints


When I needed a new dehumidifier, I was happy to find that the DeLonghi DE400P had a pump so that I could route the hose into my laundry sink instead of having to run a hose across the floor to a drain, or to empty the tank constantly. So far, the...

The pump makes the machine much more convenient

The control electronics are poorly designed for many applications

Sep, 2010

Consumer review (

Good one


It has good looks and is energy efficient. I have owned it for last one year and it still works great. Its easy to operate and use. However there is no option of auto restart. apart from that it does a great job.

None submitted

None submitted

Dec, 2009

Consumer review (

Great Dehumidifier!


I always loved this machines, the only cons I always noticed, and that's why I stopped buying them, was that I always needed to work on the machine and empty the tank. This great DeLonghi invention automatic pump function changed everything!



May, 2009

Consumer review (

This is a great Dehumidifier


In the basement. So, this Delonghi met this important criteria to me. After about three weeks of use, I have nothing but praise for this product. It is very quiet and has a long hose. It can pump the water up to ten feet high and it does this...

Word's are less to Describe the Advantages

No Disadvantages

Feb, 2009

Consumer review (

DeLonghi DE400P


DeLonghi model DE400P Dehumidifier with 40 pint capacity is ideal for room sizes up to 2,200 square feet. This fully portable dehumidifer can be moved from room to room easily, for complete household coverage. Three different fan speeds and fan-only...

Electronic controls with digital display, Patented Heavy-Duty Pump System


Nov, 2008

Consumer review (

One of the best products out there!


This a great product with great response. I had water in my basement and I had to get it out. I also had pool chemicals, so I had to keep the basement dry. Therefore, I went out and bought this product. It is fantastic! It pumps the water outside of...

Keeps the air dry and pumps the water out


Oct, 2008

Consumer review (

Most economical self-pumper


Works good, a little noisy, takes some time to work out the proper settings, not enough info in booklet


Instruction Booklet Weak

Jul, 2008

Consumer review (

love the pump feature


It pumps the water up and out of the basement through the window.

Energy Efficient, Effective

Awkward Water Pan

Jul, 2008

Consumer review (

Everything works as addvertised,


This product works right out of the shipping container just as addvertised. Removed it from box pluged it into AC outlet turned it on and it has been running perfect ever since. It runs 24 7

Mar, 2008

Consumer review (

De Longhi Dehumidifiers


If you like misery, abuse and feeling like a fool; buy a DeLonghi. My units contols failed giving me a preprogramed Error Code 1&2 which requires you to call DeLonghi per the owners manual. DeLonghi said they could not tell me the meaning of the codes...

Internal automatic pump

Runs Hot, Timer has limited funtions,Unreliable controls/unit,Parts not sold to

Nov, 2007

Product Specifications

DeLonghi model DE400P Dehumidifier with 40 pint capacity is ideal for room sizes up to 2,200 square feet. A patented heavy-duty pump system automatically removes moisture from the collection tank. Just attach the 16-foot hose (included), and the unit can be easily drained through a window or down the drain. This unit features electronic controls with a digital display. It is fully portable with durable caster wheels, you can easily move the dehumidifier from room to room. Features a fan only operation which is great for summer ventilation. Comes complete with connector hose to drain unit. This unit is Energy Star Rated.