Irox COMFO-X User Manual
Tips for ideal humidity in the home
Health risk – moisture in the home
Medical studies over the past years have confirmed that a high level of relative humidity in homes promotes more than
60% asthma and allergies.
Ideal is an indoor humidity of 40-50%.
A low indoor humidity of 30-40% is basically harmless. During harsh winters homes with a good air exchange even
have a relative humidity of less than 30% without this having a negative health effect. Some persons experience this
value as too dry. In such situations we recommend checking the Internet or consulting with experts.
--> How much moisture is necessary in the home during the heating period from October to April is determined
by the persons living there themselves.
About ten litres of water vapour accumulates in a 3-4 person household per day; showering, washing dishes/clothes,
cooking, exhaling and much more. Nowadays window seals are very tight, to conserve energy and for noise protection,
which means that this moisture must be ventilated to the outdoors several times a day.
--> The type of heating and ventilating is determined by the average relative humidity of the air in a home
during winter.
Because cold air always has less absolute moisture than the air in our rooms it is easy to exchange indoor moisture for
dry fresh air just by ventilating the room (short force ventilation periods according to the timing information on the
COMFO-X)
5 minutes
10-15 minutes
Every home (without a ventilation system) requires, depending on how many persons live there and the moisture
released an exchange of air several times a day. COMFO-X shows you exactly when it is time to ventilate!
How to achieve the right home humidity
The necessity to limit home humidity to prevent high values in normal living areas (not cellar!) exists for the most part
during the heating period, beginning with the heating period in fall. It is recommended to maintain a constant
temperature of approx. 20°C throughout the home. The range 18-22°C is marked in medium blue on the
thermometer.
In winter
When outdoor temperatures drop below +5°C indoor moisture of about 40-50% relative humidity is easily achieved by
sufficiently ventilating and maintaining the indoor temperature at approx. 20°C. This range is marked in medium blue on
your hygrometer.
If relative humidity rises over 50% the rooms should be ventilated.
During frost periods indoor humidity of less than 40% relative humidity is completely normal. Particularly in old houses,
with little heat insulation, it is important to maintain 40-50% relative humidity (at an indoor temperature of approx. 20°C)
as the upper limit, if this limit is not maintained there is the risk of mould growth.
What is important in summer?
With the exception of the cellar every room can be ventilated as you please. The COMFO-X knows no limitations for
ventilating during summer; humidity is always as high as the outdoor climate. This does not cause any damage
because the walls are sufficiently warm (except in the cellar).
In autumn and spring
When outdoor temperatures are milder for example 5-15°C a higher humidity of 50-60% relative humidity is possible.
For an indoor temperature of approx. 20°C this is marked in medium blue on the hygrometer.
Please note:
Warmer rooms are dryer (light blue) and
colder rooms have more moisture (dark blue).
We therefore strongly recommend not letting the temperature drop below 16°C in any room.