Terms of Use – App Eschborn Shock Ventilation Humidity Calculator (Eschborner Stoßlüften Luftfeuchtigkeitsrechner)
Date: November 17, 2025
1. Scope
These Terms of Use apply to the use of the mobile app “Eschborner Stoßlüften Luftfeuchtigkeitsrechner” (“Eschborn Shock Ventilation Humidity Calculator”), provided by Dr. Jan Weyer-Menkhoff, Burgstr. 2, 65760 Eschborn (hereinafter “Provider”). The app is intended exclusively for consumers within the meaning of Section 13 of the German Civil Code (BGB). Use by entrepreneurs (Section 14 BGB) is prohibited.
2. Purpose of the App
The app provides an exemplary calculation of how much humidity in occupied indoor spaces may be released or absorbed through shock ventilation. The calculated values are based on user-entered data and physical formulas. The app may provide notifications if humidity levels lie outside a generally recommended range. These notifications do not constitute recommendations or professional advice.
3. Costs
The app is paid. There are no in-app purchases or subscription models. Payment is made once at the time of purchase via the Google Play Store.
4. Conditions and Limitations of Use
Use of the app is at the user's own risk.
The Provider does not assume any warranty for the accuracy, completeness, or suitability of the calculated results. The app is intended solely for general informational purposes and is not suitable for assessing specific construction-related or health-related situations.
The Provider expressly points out that:
- the calculated results depend on the quality of the data entered,
- incorrect or incomplete entries may lead to inaccurate or faulty results,
- external factors (e.g., weather, air circulation) may influence the results,
- and that the app does not replace any building-biology, technical, or medical advice.
In particular, the app is not suitable as a basis for decisions by architects, civil engineers, craftsmen, doctors, or other professionals. Private users should likewise not make binding decisions based on the app's results and should instead obtain professional advice.
5. Availability and Technical Requirements
The Provider makes every effort to ensure the smooth availability of the app. However, no guarantee is given for uninterrupted availability, unrestricted functionality, or error-free operation. Maintenance work, updates, or technical issues may temporarily restrict use. The Provider is not liable for data loss, service interruptions, or other damages resulting from temporary unavailability or malfunction of the app, except in cases of intent or gross negligence.
6. Liability
Use of the app is at the user’s own responsibility. The Provider does not guarantee the accuracy, completeness, or suitability of the calculated results. The app serves solely general informational purposes. Notifications regarding humidity or other alerts do not constitute recommendations or professional advice.
For damages not resulting from injury to life, body, or health, the Provider is liable only in cases of intentional or grossly negligent conduct.
In the event of a breach of essential contractual obligations (cardinal duties) due to slight negligence, the Provider’s liability is limited to the typical, foreseeable damage. Essential contractual obligations are those whose fulfilment is necessary for the proper performance of the contract and on whose compliance the user may regularly rely.
Any further liability of the Provider, in particular for indirect or consequential damages or lost profits, is excluded.
Mandatory statutory liability, in particular under the German Product Liability Act, remains unaffected.
7. Intellectual Property
The app itself and all content (texts, calculations, user interfaces) are protected by copyright. Reproduction, modification, or distribution beyond the intended use is not permitted. The user is granted only a simple, non-transferable right to use the app for its intended purpose.
8. Translation Note
The English version of these Terms of Use is a translation of the German original. In case of doubt, the German version shall prevail.
9. Final Provisions
German law applies, excluding the United Nations Convention on Contracts for the International Sale of Goods (CISG). Mandatory consumer protection provisions of the country in which the user has their habitual residence remain unaffected. No binding place of jurisdiction is agreed for private users.