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DRY 400Through-the-wall

DRY 300 | 30 m²
DRY 400 | 45 m²
DRY 500 | 60 m²
DRY 800 | 90 m²
DRY 1200 | 120 m²
Pool size
45 m²
78 l

Top extraction - Best efficiency

MICROWELL DRY 400 is comprehensive solution for indoor swimming pool environment control. Monitoring and regulating humidity and air temperature, MICROWELL DRY 400 is suitable for smaller pools, wellnesses or hot tubs. Operating on the condensation principle, it provides constant, reliable and highly effective heat recovery with the highest efficiency. Its low sound emisions and exclusive design makes MICROWELL DRY 400 top innovative solution for indoor pools.

Extended lifetime warranty, click and learn more.

Where to buy
Size guide
Pool surface
Extraction rate
Extraction rate
Air flow
Pool room Min/Max
DRY 300 WAVE 30 m² 36 l/24h/60% RH, 30C/ 48 l/24h/80% RH, 30C/ 550 m³/h Min 80 m³ / Max 275 m³
DRY 400 WAVE 45 m² 48 l/24h/60% RH, 30C/ 58 l/24h/80% RH, 30C/ 600 m³/h Min 85 m³ / Max 300 m³
DRY 500 WAVE 60 m² 66 l/24h/60% RH, 30C/ 101 l/24h/80% RH, 30C/ 800 m³/h Min 100 m³ / Max 400 m³
DRY 800 WAVE 90 m² 90 l/24h/60% RH, 30C/ 136 l/24h/80% RH, 30C/ 1100 m³/h Min 135 m³ / Max 550 m³
DRY 1200 WAVE 120 m² 120 l/24h/60% RH, 30C/ 181 l/24h/80% RH, 30C/ 1200 m³/h Min 145 m³ / Max 625 m³

DRY 300 TTW product components

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Not sure which dehumidifier

should you choose?
How choose a heat pump?

Key data

Noise Level | DRY 400 - Microwell
Noise Level
42 dB
Heat Recovery | DRY 400 - Microwell
Heat Recovery
1900 W
Power Consumption | DRY 400 - Microwell
Power Consumption
700 W
Air Flow | DRY 400 - Microwell
Air Flow
600 m³/h

Customize your


Impressive Performance

With a remarkable extraction rate of up to 78l/day, this dehumidifier is designed to handle indoor pool areas of various sizes. For both residential and commercial pools, Microwell Dry 400 TTW has the power to maintain optimal humidity level and ensure healthy environment.

Energy-Efficient Humidity Control

Operating efficiently is a core feature of Dry 400 TTW. Experience substantial savings on energy bills while enjoying a consistently comfortable pool atmosphere. Our dehumidifier not only safeguards your pool environment but also your wallet.

Robust Metal Construction for Durability

The product is made of high-quality materials and is corrosion-resistant. Its sturdy construction ensures a long service life, even in the demanding poolside environment.

User-Friendly Control Panel

Taking control of your indoor pool environment has never been easier. Equipped with a user-friendly control panel, the unit allows you to effortlessly adjust settings, monitor humidity and set your requested humidity level for the perfect pool experience.

Technical data and more

If you want to know more just click

Microwell DRY swimming pool dehumidifiers are designed with customer in mind. Built with best materials, modern equipment and carefully executed processes on every step of product development, they offer advanced functionality and the widest selection of accessories for customer‘s satisfaction.

Specially developed dehumidifiers for residential and hotel pools, spa and jacuzzi. If you are looking for a humidity control technology in a private pool, hotel or spa, by Microwell you are in the right place.

DRY400 will prevent condensation on your windows and walls. It will prevent bacteria grow and strange humid smell or damp feeling. It will do its job fully automatically and quietly.

DRY dehumidifiers are leading Microwell swimming pool dehumidifiers used in 30+ countries to mainly control the humidity in pool and spa areas. DRY dehumidifiers are also vastly used for areas that require effective humidity control with a machine which is as quiet and as less disturbing as possible.

DRY400 range is suitable for pools and water areas with water surface up to 45m2.

DRY400 range is designed for high moisture extraction, low energy consumption and low noise.

DRY400 unit extracts 48 liters of vapor from air per day at typical pool conditions of 30°C air temperature and 60% relative humidity. DRY dehumidifier series is designed to do the job in other possible environments. It provides with a decent extraction of almost 28 liters per day at 5°C air temperature and 80% relative humidity and excellent 70 liters at 35°C air temperature and 80% relative humidity.

Thanks to outstanding design, leading technology and up-to-date concepts, Microwell products achieve up to 36% lower energy consumption than the others. Our product saves you money every day and helps to keep your bill under control.

DRY dehumidifiers are low energy dehumidifiers designed to save energy costs every hour they run. DRY400 model uses on average only 700W of energy. In return the unit provides with an effective humidity control through massive extraction and high heat recovery up to 1900W. This makes DRY400Model the most energy efficient on the market.

Dehumidify and heat by one device. DRY400 provides with heat recovery of 1900W while consuming only 700W. The unit, while dehumidifies, provides with a free heating which can be subtracted from your current heating system. You thus will save twice while running this machine. Should more heating be required, the unit can be equipped with either LPHW (Low Pressure Hot Water coil) or electrical heater with a combined maximum heating ability of an amazing 5.4kW!

DRY dehumidifiers are installed in:

  • Swimming Pools
  • Spas
  • Hotels and Wellnesses
  • Hot tubs and Jacuzzis
  • Fitness clubs
  • Gyms
  • Museums and archives
  • Warehouses
  • Drying rooms for laundry, breweries
  • Military storages
  • Bakeries
  • Wine cellars

DRY400 range can be mounted on a wall to be out of the way and yet be in position to be in control of humidity. They also are very popular on the mobile stand using 4 fully rotatable wheels providing more space. Should the unit be completely hidden or due to electrical safety it cannot be installed directly inside pool or hot tub area, the dehumidifier can be installed out of pool hall. DRY dehumidifiers can be mounted in a technical room providing humidity control through through-the-wall ducts with 2 elegant grills visible from pool hall. Customers are very pleased by this through-the-wall installation as it is practically noiseless.

DRY400 Through the wall comes in through-the-wall installation make. The unit can be mounted behind up to a 400mm thick wall. The ducting is made from galvanized steel.

Control or regulation of the unit is very important for a customer. DRY400 model provides with all possible options you may require. You may go for a classic old school built-in rotary humidistat; you can upgrade to a remote wired humidistat to place it on a wall; you can regulate the unit using remote wireless digital control or simply use built-in digital control. All controls are designed for accuracy and customer comfort.

Noise level is a frequently asked question. DRY dehumidifiers are probably the quietest on the market with only 42dB(A) applying Microwell unique technology ultraQUIET+ eliminating any excessive noises or vibrations. Typical noise level of a quiet room is 30dB(A), typical conversation between 2 people can rise up to 60dB(A). Unit’s 42dB(A) at air flow of 600m3/h, extraction rate of 70 liters and extra heating of 1900W just confirms how unique Microwell machines are.

DRY400 model uses 5 speed AC fan simulating DC energy saving operations.

DRY400 model is gentle to environment and eco-friendly as it uses the most advanced R410A refrigerant.

The unit can supply fresh air in excess of 30% of its nominal air flow, i.e. about 180m3/h. The air is effectively preheated by hot condenser prior it enters pool hall.

Air aggressiveness is very important to a dehumidifier as it typically operates in a chlorine or salty environment. Microwell ensures probably the highest protection of the whole machine and its components. The coils are from anodized aluminum fins coated with GoldFin epoxy finish. Copper pipes are finished with zinc coating for a maximum protection against aggressive substances present in pool’s air. All metal parts are galvanized and powder coated, where needed stainless steel or titanium of highest pureness is used.

The units are manufactured in European Union complying with very strict engineering standards. To ensure absolute quality, each unit is individually tested for full operations before it is packed and loaded on truck or container. The factory is certified according to ISO9001, ISO14001 and ISO18001. Each unit is certified against EU standards holding CE certificates and full Conformity. Other compliant standards are RoHS and IP44.

DRY dehumidifier series have widest range of makes and accessories options on the market. The unit can be adjusted and tailored is such a way that seemingly there is no pool or spa or hotel this dehumidifier could not serve. Please see below section of Standard equipment and Accessories for more information.

Typically, the unit is in stock near you. Due to many different ways the unit can be tailored on demand, it may take up to 10 days to deliver the unit to you.

DRY dehumidifiers are amazing due to their micro+ features providing they have by standard. More info micro+.

Humidity is not an enemy when controlled but can cause serious troubles otherwise. Ideal humidity for pool or spa users is when they feel comfortable. This feeling is achieved by an ideal relative humidity from 55% to 65%. Humidity above 70% is detected by condensation on windows and walls and the humidity continuously deteriorates the pool or spa environment. It is also a perfect environment for mould and bacteria to grow. Humidity lower than 45% actually causes a reversed problem to bathers in the form of dry feeling and possible harm to mucous tissue. The innovative series of Microwell dehumidifiers keep the humidity at ideal 55%-65%.

If you need assistance in sizing the right dehumidifier model for you please use our online calculator providing with an instant model type needed for your pool. CALCULATOR

Or click on HOW CHOOSE A DEHUMIDIFIER on the left side of your screen.

DRY 300 TTW product components

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