Reduce Sick Leaves with Optimal Humidity

Luftfeuchte Krankenstände_reduzieren

Viral infections and flu epidemics are among the most common causes of sick leave. Scientific studies at Yale University show that the immune defense and lifespan of viruses are strongly dependent on the relative humidity of the air. Dryness in the throat, clearing of the throat and the urge to cough are the first warning signs. At the latest when it comes to hoarseness, work performance is limited.

Viruses are inactivated most quickly at a relative humidity of between 40 and 60%. In addition, the human immune system works most effectively in this area. Depending on various factors such as the heating, the building structure or the number of people, the humidity drops and rises. Especially in winter, the relative humidity in offices is often only 20%.


  • Sick leave is unpleasant and expensive, fear of viral infections increases
  • Strong fluctuations depending on heating, building structure and people
  • Difficult to monitor the success of measures

A complete solution for all premises

Wireless sensors record current indoor climate values. Gateways collect the measured values and transmit them via mobile radio. The data is clearly displayed in the LineMetrics Cloud.


Creating transparency and seamless documentation

Analyze the development of relative humidity in the long term and evaluate the effects of measures in a targeted manner.


Receive warning messages for critical values

Receive messages when humidity levels exceed or fall below certain values so that appropriate measures can be taken immediately.


Easy retrofitting without cables and network

One wireless gateway is often sufficient for the entire building. Data is sent to the cloud via mobile radio. Cables, IT and network are not necessary.


Easily retrieve and process real-time data

All data can be analyzed at any time and used in other systems via API. QR codes simplify direct access on site with a cell phone.

Reducing the survival time of viruses

When a person sneezes, germ droplets (medically known as “aerosols”) are sprayed into the room air. These droplets are a mixture of water, germs and salts and are directly affected by the relative humidity of the indoor air, regardless of whether they are still suspended in the air or adhering to a surface.

Scientific studies have shown that the survival time of viruses in these droplets is shortest at a humidity of between 40 and 60%.

Shorten the floating time of aerosols

While aerosols are suspended in the air, the viruses they contain are highly infectious. They are inhaled directly into the lungs and spread quickly. If the humidity is below 40%, the germ droplets release a proportion of water into the room air and thus become lighter. They hover in the air for longer and thus increase the probability of transmission. If the room air is sufficiently humid, aerosols absorb water from the air, become heavier and settle more quickly on surfaces.

Strengthen the immune system

Everyone knows the feeling of a dry throat and the urge to clear your throat. At a humidity of less than 40%, the mucous membranes in the throat dry out, which can trigger this sensation. This also restricts the immune system, as these mucous membranes are responsible for the defense and removal of viruses.

The immune system can only work effectively and remove viruses from the respiratory tract if there is sufficient relative humidity. If a humidity level of 40 to 60% were maintained in buildings, infections could be significantly reduced and the risk of infection minimized.

From just €9 per room per month!

Complete package including gateway, sensors, data transmission etc. – simply start without investment costs.

Suitable wireless sensors

LoRa CO2 sensor

LoRa temperature/humidity sensor

LoRa CO2 Eco Sensor

LoRa Luftqualitätssensor (inkl. Display)

LoRa 7-in-1 Raumklima Sensor (inkl. Display)

Is your sensor not included?