Hysure 700ml Automatic Dehumidifier Review

Can a cheap dehumidifier under £50 really deliver results? I put the Hysure 700ml Automatic Dehumidifier to the test to see how it handles mould on a bedroom wall

A hysure 2L dehumidifier
(Image: © Future)

Homebuilding Verdict

For a compact and lightweight model, the Hysure 700ml Dehumidifier performs fairly well and with minimal noise. However, it's only suitable for small spaces and will not make a significant impact in large rooms.


  • +

    Relatively quiet operation

  • +

    Small and lightweight

  • +



  • -

    Short power cable

  • -

    Takes a while to extract moisture

  • -

    Only suitable for small spaces

You can trust Homebuilding & Renovating. Our expert reviewers spend hours testing and comparing products and materials in order to help you choose the best for your home and garden. Find out more about how we test.

As someone who lives in a listed building, getting rid of mould is often top of mind. As I mentioned in my recent review of the ProBreeze 20L Premium Dehumidifier, I've been fighting a constant battle with humidity levels and condensation causing mould on my walls for years, so I finally decided to invest in some decent dehumidifiers to tackle the problem. 

Having successfully got on top of condensation and mould in my home office, I turned to our guest bedroom where I required a much more affordable and compact solution. Thankfully, the Hysure 700ml Automatic Dehumidifier is available to buy on Amazon  for under £50 and it promised to be more energy-efficient, lighter and quieter than its competitors. 

Below, I share my thoughts on the performance of this affordable dehumidifier and whether I think it's worth the purchase. 

First impressions of the Hysure 700ml Automatic Dehumidifier

A woman holding a small dehumidifier in one hand

The Hysure 700ml Automatic Dehumidifier is so lightweight you can carry it with ease.  (Image credit: Future)

When I first opened up the box I was astonished by how lightweight this dehumidifier was – you can literally hold it up with one finger! It's a fairly sleek and modern looking dehumidifier, so it won't be out of place in a lot of homes. However, I believe you can also purchase the same model in black on Amazon Prime  if that's more your style. You can also buy a larger 2L version on Amazon for a bit more money too.

It's incredibly easy to assemble and get up and running. However, I wasn't too impressed by the short length of the power cable, as this made it difficult to position anywhere but against the wall. 


  • Brand: Hysure
  • Material: ABS plastic
  • Voltage: DC 9V
  • Power: 23W
  • Dimensions: 163 x 107 x 267mm
  • Volume of tank: 700mL
  • Efficiency: 300ml/day (at 30 ℃, 80% RH).
  • Coverage: 15㎡
  • Working temperature: 10-50 ℃

What features does the Hysure 700ml Automatic Dehumidifier have?

The back of the hysure 2l dehumidifier

(Image credit: Future)

The Hysure 700ml Automatic Electric Dehumidifier is fairly limited in terms of its spec. However, it does boast the following features:

  • Ultra-Quiet Technology: The Hysure dehumidifier uses 'peltier technology' with no compressor, making it extremely lightweight and quiet. It operates with minimal noise, allegedly allowing you to run it throughout the night without disturbing your sleep.
  • Compact Size: This mini dehumidifier's small dimensions make it a convenient choice for a children's nursery or other small indoor spaces.
  • 700ml Capacity Tank: The dehumidifier can extract up to 300 ml of moisture daily to help purify the air in small spaces.
  • Energy Saving: The model brands itself as an environmentally friendly solution for absorbing damp and condensation in your home.
  • Auto Shut Off: This portable moisture absorber automatically shuts itself off when the tank is full and ready for water to be emptied.

How well does it work?

In our guest bedroom we've been suffering from mould on our skirting boards. This is most likely caused by poor home ventilation allowing a build up of condensation and moisture to form in corners and behind furniture, resulting in mould growth. So I plugged in the Hysure 700ml Automatic Electric Dehumidifier and let it do its thing. 

The room is roughly 4m2 and I'm not sure if that strictly qualifies as a 'small' space, but based on the overall results, I'd say it doesn't. After running this dehumidifier in our home for the past 6 months, I've drawn the following conclusions:


  • I've been impressed by its consistent performance. Unlike a similarly priced dehumidifier we had to return within 2 weeks of purchase as it broke, this one shows no signs of stopping anytime soon.
  • This small dehumidifier lives up to its promise of quiet operation. The minimal ambient noise it generates doesn't disrupt a good night's sleep.
  • Its compact and lightweight design makes it easy to disassemble and empty every few days.
  • The automatic shut-off feature eliminates worries about your dehumidifier leaking all over the floor when you forget to empty it.
  • In the corner where it was running I did notice a visible improvement to the mould on our skirting boards (see photos above). 

The 2l hysure dehumidifier being taken apart

In the 6 months I've been running this model it has started to discolour. (Image credit: Future)


  • The power cable is extremely short, so it has to be positioned close to a power source. 
  • This model is suitable only for very small rooms. I ended up moving it into our 2m2 bathroom, as it didn't massively improve the condensation in the bedroom overall.
  • If the noise doesn't affect your sleep, the LED light might. Unfortunately, there's no option to turn it off, so if you place this model in your bedroom, it will serve as an unintended night light as well
  • 700ml is not a great deal of moisture and it takes roughly 2.5 days to extract this from the air.
  • After 6 months of use I noticed a lot of discolouration inside the dehumidifier (see photos above).

How much does it cost to run?

Dehumidifier running costs will vary depending on the size and spec of your model. The Hysure 700ml Automatic Electric Dehumidifier is fairly inexpensive to run, costing mere pennies each day. This is particularly handy when you need to run it consistently. 

My thoughts on the Hysure 700ml Dehumidifier

This compact dehumidifier performs well for its size and has helped remove mould from the wall in places. However, if you have a serious underlying mould or damp issue in your home this is not the dehumidifier for you. The Hysure 700ml Automatic Electric Dehumidifier is an affordable dehumidifier priced under £50 and you should adjust your expectations accordingly. 

If price point is the main factor in your buying decisions then you can't go wrong with this model - especially if you're dealing with a minor condensation or occasional damp issues in a small bathroom or spare room. This dehumidifier is perfect if you're trying to achieve normal humidity in a house or you only have a small room to cover.

However, if you have significant issues with condensation then you should invest in a more serious piece of kit. I recently reviewed a much larger and more expensive dehumidifier - the ProBreeze 20L Premium Dehumidifier available on Amazon - and I would recommend purchasing this model over the Hysure if you have a bigger home. 

An important update

Since I wrote this review my Hysure dehumidifier has broken. This is most likely because I failed to maintain the unit – following the manufacturer's instructions for cleaning and troubleshooting the problems I was experiencing. 

To avoid experiencing these issues with your own dehumidifier, I recommend weekly maintenance and cleaning. You should also ensure that you register your warranty online. If your dehumidifier breaks within its warranty you may be entitled to a replacement model free of charge. 

Dehumidifiers are a great way to reduce humidity, mould and condensation in your home. However, it is crucial to address any underling issues first by treating damp at the source and ensuring you have sufficient home ventilation to begin with. 

Gabriella Dyson
Assistant Editor

Gabriella is Homebuilding & Renovating's Assistant Editor. She is a DIY enthusiast and a lover of all things interior design. She’s spent the past decade crafting copy for regional publications, award-winning architects, and leading UK homeware brands. 

She has a particular passion for historic buildings and listed properties, and she is currently in the process of renovating a Grade II-listed Victorian coach house in the West Country. At Homebuilding & Renovating Magazine, Gabriella is responsible for curating the magazine's home case studies and regularly contributes to the Homebuilding website.