Organ climatic conditions


We have been closely involved with the subject of organ-climate for over 10 years.


Do you have the feeling that it is too dry in winter or too humid in summer for your instrument?


Do you occasionally hear loud “cracking noises” from the organ case?


Are the keys often very uneven?


Do the pedal or manual couplers no longer work properly?


Do you have hardly any “depth of touch” in winter or summer?


Does your instrument not stay in tune well?

In order to be able to analyse the situation and take the correct steps, you need data from a calibrated gauge and an evaluation of the results by a specialist who knows about organs.
For this you need a measurement of climatic conditions in the organ.


Some of my models:
at the bottom an appliance from
the newest generation


What is a “measurement of climatic conditions in the organ”?

For a measurement of climatic conditions, a calibrated gauge is placed in the organ in a position where the air circulates freely, so that the temperature and the relative humidity during a particular time frame can be measured. At the end of this period the data are converted on the computer into a diagram which can be clearly read and interpreted, where the exact course of the temperature and relative humidity are shown in a coloured curve.

Then the curves are analysed by an experienced organ builder. This analysis must take into account the particular church and its infrastructure, the location of the measurement, the heating and much more. In this we benefit from over 100 organ climate analyses.


Data Logger in use in an organ

Normally the coloured diagram of the organ climatic conditions over the course of one month is printed on one A4 sheet. It is however also possible to print just one day (for example 24th December), in order to discuss the heating and the adjustment of the heating controls with the verger. We work together with a heating and climate engineer who has wide experience in installation or alteration of church heating.

Should the humidity curve be above or below the recommended level, I can give advice and show possible courses of action. Action should be taken at under 40% and over 75% relative humidity. These are the boundaries for the organ builder’s guarantee.

A thorough analysis of climatic conditions enables you to take appropriate steps in time to avoid damage to a valuable organ. The following pdf file from winter 2005/2006 shows which results are contained in a “measurement of organ climate”.

Description of work involved
in a measurement of climatic conditions.



Diagram of a measurement
of climatic conditions.



Analysis of a sample church in Zurich


Serious damage to a windtrunk from the organ of the Catholic Church in Geroldswil, caused by an overly dry room climate.

Furthermore, the organ was standing on a heated floor.