Mold Risk Calculator – When Does Mold Occur?

Mold can be harmful to health, as it releases spores that can sometimes be dangerous when inhaled. Mold also attacks building structures and furnishings, often resulting in costly renovations. That's why it's important to avoid mold as much as possible. With the air-Q Mold Risk Calculator, you can calculate the risk of one of the main causes of mold — condensation on interior walls (due to poorly insulated exterior walls).

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Mold Risk Calculator

The Mold Risk Calculator determines the relative humidity reached at the interior wall of a house. If the relative humidity at the interior wall is too high (meaning the dew point is very close to the interior wall temperature), condensation can form and the wall becomes damp. A mold probability is then derived from this.

Determine the U-Value of Your House Wall

The U-value (thermal transmittance) of your house wall can be found in your property's building documents. For rented apartments, you can ask your landlord for the U-value. The lower the U-value, the better the thermal insulation.

Example U-values: single-glazed windows: 5.9 · concrete wall (25 cm): 3.3 · brick masonry (24–36 cm): 1.5–0.8 · passive-house-standard windows: 0.8 · low-e glazed windows: 1.3 · solid wood exterior wall: 0.5 · aerated concrete exterior wall: 0.23.

The interior thermal resistance is assumed to be 0.13 m²K/W. If, for example, furniture is placed directly in front of the wall in question, the thermal resistance can increase significantly, which leads to an increased risk of mold.

We continue to improve the air-Q Mold Risk Calculator and welcome your feature requests and suggestions.

Mold-Free Index in the air-Q

air-Q mit Smartphone App und Schimmelfrei-Index

Keep an eye on mold risk with the air-Q and the Mold-Free Index. Measure indoor climate and air pollutants with the air-Q.

The air-Q Mold-Free Index continuously calculates the current mold risk by incorporating the humidity and temperature values measured by the air-Q and deriving an index value from them. A high index means low risk of mold developing; a low index means an increased potential risk of mold.

Our air-Qs with Mold-Free Index

air-Q light - For basic monitoring of offices, schools and homes.

The air-Q light is designed for monitoring classrooms, offices and homes, and provides basic information on air quality and stale air. The smartphone app and web features are all usable. Customizable LED themes allow it to also be used as a CO₂ monitor.

Integrated sensors: 5 (+2 virtual sensors)

air-Q light buy in the webshop – from 349 €

air-Q basic - The All-Rounder for Demanding Air Quality Measurement

The air-Q basic (AQ-1000) offers everything to comprehensively monitor your home and office. It alerts you to hazards such as smoke, fires, toxic gases, and keeps you safe and healthy. Includes a free smartphone app and web app. Fully customizable with LED themes and acoustic signals.

Integrated sensors: 10 (+2 virtual sensors)

air-Q pro - The Professional for Ambitious Users

The air-Q pro (AQ-2000) offers all the features of the smartphone app and web app, as well as connectivity, LED themes and acoustic signals. With the additional sensors, hazards such as smoke and fire can be avoided, and even more toxic gases can be detected. For your safety and health!

Integrated sensors: from 13 (+2 virtual sensors)

air-Q pro buy in the webshop – from 719 €

air-Q science - For Technology Enthusiasts and Scientists

The air-Q science (AQ-Science) offers additional features beyond the smartphone app and web app through the air‑Q API. This allows access to developer features. It also opens up all possibilities for your own custom smart home applications. An individual high-quality additional sensor can optionally be selected.

Integrated sensors: from 13 (+2 virtual sensors)

Optional sensors

Custom Sensor

air-Q radon science - Detect the Radioactive Noble Gas Radon and Measure Air Quality

The air-Q radon science includes our in-house developed radon sensor as well as other essential air quality sensors. As with all air-Qs, the free smartphone app and web app are included. The air-Q radon science also offers additional features via the air‑Q API, which allows access to developer functions and advanced settings.

Integrated sensors: 5 sensors + 2 virtual sensors + 6 optional sensors

Optional sensors

air-Q radon science buy in the webshop – from 559 €

air-Q und air-Q radon Luftqualität Messgerät

Monitor air quality, all air components and environmental influences with the air‑Q. For your health and performance.

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