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Humidifier B 400
Home Comfort
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  4. Evaporation humidifiers
  5. B 400

Humidifier B 400

Large-scale humidification for all applications for the commercial sector, office spaces and public buildings

A healthy room humidity level in closed rooms

The hygrostat-controlled high-capacity humidifier B 400 does away with too dry room air in office spaces, public authority buildings, nurseries, museums and similar large-scale workplaces. Whether you want to optimally humidify the entrance area of a savings bank, recreation rooms in retirement homes, corridors in the hospital, or the citizen service area of the municipal administration building: The mobile disc humidifier B 400 with its strong evaporation performance of 60 l/24h is ideal for almost unlimited air optimization of highly frequented areas sized up to 360 m² or 900 m³.

A common problem: Heating and ventilation systems dry out the room air

Modern aeration systems are indispensable in companies, buildings of public authorities and public institutions. They supply the interior spaces with fresh air, remove unpleasant odours and create a pleasant room climate. At least during summer! In the cold season, however, the continuous air changes excessively dry out the indoor air, in the winter the humidity level in rooms often drops by 20 - 30 %. The heating additionally warms up the air that is already dry. With the effect that the dust exposure in the room increases, the mucous membranes dry out and the natural defences of the body have difficulties with warding off pathogens. In particular in public areas it is therefore indispensable to provide optimal humidification to the room air. Also for the purpose of protecting risk groups such as the elderly with an impaired immune system and persons with previous diseases of the respiratory tract against the dangers of airborne germs in the room air.

Humidifier B 400: Equipped with everything that a healthy room climate needs

To provide for an equally low-maintenance and reliable continuous operation, the evaporation humidifier B 400 comes equipped with a large-volume 29-litre water tank with a filling level indication and status light, as well as a low-noise, 2-stage fan with an automatic switch-off function, which is activated when the target value has been reached. In this way, your individually desired room climate can be optimally adjusted. Its variably applicable outlet grille and the wall spacer that is included in the scope of supply both ensure that the blown-out air optimally circulates within the room. The steplessly adjustable hygrostat control humidifies the room to the preset target value and, when the target value is reached, switches the device off until it becomes necessary to humidify the room air again.

Humidifier and air washer in one device

The permanently rotating evaporation fleece of the B 400 humidifies the room air in a perfectly hygienically fashion and, in addition, makes it permanently clean! Ideal air conditions to ensure that you can breathe freely and healthily!

Impacts of the humidity level on the infectivity of the room air

The answer to coughing or sneezing in closed rooms when you have a cold is often a disapproving frown. Understandable, since with every cough or sneeze thousands of highly infectious germs droplets (also referred to as aerosols) are emitted explosively into the ambient air and, in the worst case, are inhaled by someone sitting next to you. The use of the humidifier B 400 reduces this risk of infection! Permanent effect without the use of chemical disinfectants!

A humidity level between 40 and 60 % reduces the risk of a droplet infection

The humidifier B 400 renders germ droplets that are coughed or sneezed out inactive within seconds. The humidified room air changes the salt concentration within the germ droplet, removing the infectiousness from the actual pathogen in the conglomerate of saliva, salt and germs immediately after it has touched the room air. This means that a humidifier does not reduce the number of droplets in the air, but it significantly reduces the infectivity of these airborne aerosols!

Humidification protects the mucous membranes of the respiratory tract and strengthens the immune system

The sensitive mucous membranes of mouth and throat play a crucial role when it comes to the defence against harmful viruses and bacteria. The respiratory tract is provided with sophisticated protective mechanisms for the defence against pathogenic microorganisms, which, however, only work properly if the necessary fuel is available: moist air! If the air is too dry, this will result in dried-out mucous membranes, fatigue, tiredness and a lack of concentration. Your immune system is weakened and your productivity will decline.

The humidifier B 400 provides for a double infection protection

By using the B 400 you directly reduce the risk of infection in two ways. On the one hand, the infectivity of the suspended aerosols is almost eliminated, but secondly the mucous membranes of the respiratory tract are optimally humidified, ensuring that the body's own defence system works at full blast.

Optimum room humidity level in every environment

The use of the mobile humidifier B 400 significantly reduces the risk of being infected with pathogenic viruses and bacteria in the numerous public facilities and buildings of our daily life. Moreover, the B 400 creates a perfect room climate for maximum productivity and efficiency at the workplace. The B 400 can also be ideally used for the value retention of precious artefacts, scripts and exhibits.

Health protection for employees, visitors and customers

An optimized humidity level reduces the risk of infection with pathogens in public facilities with a high volume of public traffic. The humidifier B 400 reduces the number of pathogenic germs in a variety of different rooms, entrance, passage and waiting areas:

  • Open-plan offices, canteens
  • Hotels, guest houses
  • Retail sector
  • Catering trade
  • Hospitals, day-care hospitals
  • Retirement homes
  • Medical practices
  • Nurseries
  • Schools, nursery schools
  • Savings banks and credit institutions
  • Universities
  • Correctional facilities
  • Buildings of public authorities, administrative bodies
  • Sheltered workshops
  • Churches, meeting rooms
  • Car showrooms
  • Trade fairs, conference rooms
  • Cultural centres
  • Cinemas, theatres
  • Fitness studios, therapy rooms

Value retention of irretrievable art, objects and scripts

To ensure the value conservation of sensitive exhibits of wood and paper, canvases as well as historical scripts and books, a constantly optimized humidity level is necessary. The use of the humidifier B 400 prevents brittle paper, shrinkage as well as cracks and breakages in the material. The use of the B 400 minimizes disturbing dust turbulences and therefore dust deposits on the exhibits and showcases. It is perfectly suited for:

  • museums
  • exhibition halls
  • libraries
  • galleries
  • town archives
  • art collections
  • art storage facilities
  • schools of arts

Evaporation humidifier B 400 – special equipment features

B 400 – dimensions
Strong humidification performance with a small footprint: With its low depth of only 31.6 cm, the B 400 in its pure white sheet steel housing can also be positioned discreetly and space-savingly in passage areas.
B 400 – filter and tank
Well thought out in every respect: The variably applicable outlet grilles allow you to individually adjust the air discharge direction. The tank is filled via an easily accessible filler neck on the top side of the device and, if required, the evaporation fleece can be replaced in only a few steps.
B 400 – rear side
To ensure optimum air circulation in the room, the humidifier B 400 comes equipped with a two-stage, adjustable fan as well as wall spacers, which can be additionally mounted.
B 400 – operating panel
Clear and simple when it comes to its operation: The hygrostat and fan are controlled by means of practical rotary knobs. The water filling level indication clearly shows you when it's time to refill the water tank.

Evaporation humidifiers

All Evaporation humidifiers in direct comparison:

To find the Evaporation humidifier which exactly meets your requirements, please consult the concise overview of all Evaporation humidifiers from Trotec, which we're providing to you here so that you can compare them directly to each other.

Models which you do not wish to include in your comparison can be easily dismissed with only one click.

Technical data by comparison

An agreeable room climate ensured by the humidifiers from Trotec

Be it humidifier, evaporator or air washer – Trotec devices allow you to breathe freely after only a short period of use. Both models optimally regulate the humidity level, thus ensuring a healthier room climate and protecting your furniture, books, paintings or antiques from damage caused by too dry or too humid air.

However, to ensure safe water quality at low maintenance costs in a highly dusty and polluted indoor environment, SecoSan® Stick and LiQVit should be used in combination.

A few practical benefits:

  • Reduces the risk of infection with pathogens in public spaces
  • Protects valuable art, scripts and paintings from drying out
  • Provides for sufficient humidification of the mucous membranes of the respiratory tract.
  • Energy-saving and therefore suitable for continuous operation
  • Filling level indication with status light
  • Stepless hygrostat control
  • Clear operating panel
  • Rotating evaporation fleece cleans and washes the air
  • 2-stage fan
  • Automatic switch-off function
  • Adjustable outlet grille
  • Robust design of powder-coated sheet steel
  • Optimum air circulation by integrated wall spacer


B 400 Humidifier show in Trotec online shop

B 400 Humidifier

You save: 20.00 £

289.95 £ 269.95 £ incl. VAT Show net price (VAT not included)


Daily rent:
14.40 £ incl. VAT per day


Technical data

Technical data
General information
  Article number
Air flow rate
  Max. air volume flow [m³/h] 800
Electrical values
  Mains connection 220 - 240 V, 50 Hz
  Power input | Humidification [kW] 0.053
Electric connection
  Connection plug CEE 7/7
  Cable length [m] 1.61
Evaporation capacity
  Power Max. [l/24h] 60
Fan stages
  Fan stages 2
Recommended room size
RH control
  Hygrostat, internal
  Humidity sensor, internal
  Radio sensor
Water tank
  Contents [l] 29
Air filter
  Sterilization UV lamp
Sound values
  Level min. - Distance 1 m [dB(A)] 29
  Level Max. - Distance 1 m [dB(A)] 42
Functions and features
  Hygrostat-controlled automatic operation
  Air humidification function
  Length (packaging excluded) [mm] 316
  Width (packaging excluded) [mm] 625
  Height (packaging excluded) [mm] 720
  (packaging excluded) [kg] 19
Equipment, features and functions
Housing colour
  Housing colours White
Housing design
  Sheet steel
Timer function
  Automatic switch-off

 standard equipment

 optionally available

 not available



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