Controlled humidity for healthy air


Observations of stains on the walls, mold or peeling paint? These signs are a reflection of a moisture problem in the home. In this article, we propose you to discover the consequences of a too dry or too humid air and the solutions to remedy the problem.


The moisture content

Maintain an ideal humidity level contributes to good indoor air quality, an indispensable factor in the comfort and wellfare of the occupant.

Also called hygrometry or relative humidity, the humidity level corresponds to the percentage of water vapor present in the ambient air at a given temperature. It is expressed as a percentage and is measured with a hygrometer (commonly integrated in portable weather stations).

In a housing, this rate varies according to different factors such as seasonality, outside temperature, number of inhabitants, type of heating or human activity.


Healthy air : 40 and 60%

The Agency for the Environment and Energy Management (ADEME) recommends a rate of hygrometry in housing between 40% and 60% for an interior temperature between 18°C and 20°C.

To be noted that in some rooms such as the kitchen and bathroom, this rate can exceed these values in a punctual way.


Too dry or too moist ?

When the relative humidity in a housing is below 40%, the air can be considered too dry and conversely, when the rate is above 60%, the air is too moist.

The effects on the environment of the housing and the wellfare of the occupants can be different according a rate of hygrometry


  • Hygrometry <40% :

A relative humidity rate in a housing lower than 40% favors the increase of dust, degradation of the furniture and the parquet, combined with irritations and skin drying, dehydrations, pulmonary problems…

  • Hygrometry > 60% :

the moisture content higher than 60% contributes to the development of mold and dust mites, responsible for allergies and a number of health problems such as respiratory problems.

Causing harmful impacts on the habitat and the health of the occupant, it is therefore essential that the air is neither too dry nor too moist


Our recommendations

Below are some tips for your housing in case of a moisture problem:

  1. Establish a complete diagnosis of indoor air with the help of an expert
  2. No existing system: install a controlled mechanical ventilation system (CMV) with humidity regulating components (humidity sensitive air inlets and extract vents ANJOS)
  3. Existing system: check the proper functioning of the ventilation system and replace defective components
  4. Regularly maintain all components of the ventilation system (extract vents, inlets, casing and sheats)


Controlled Mechanical Ventilation (CMV) is one of the most effective solutions to humidity problems in the home. It contributes to the creation of a healthier and more comfortable indoor environment.


Our sales representatives are available to provide information and help you select the ventilation component that will meet your needs.