🌬️GSW: Smart Ventilation Suite (Absolute Humidity & Dew Point logic)

:wind_face: GSW: Smart Ventilation Suite

Advanced ventilation control using Absolute Humidity (g/m³) and Dew Point logic.

Created by Iakovos Venieris (Greece Sky and Weather).

:thermometer: Why Absolute Humidity?

Most ventilation automations rely on Relative Humidity (%), which can be misleading because it changes with temperature. This suite uses Absolute Humidity to ensure the fan runs only when the outdoor air is actually drier than the indoor air, preventing you from accidentally bringing more moisture inside.

:bathtub: Features: Advanced Humidity Ventilation (Bathroom)

  • Smart Humidity Logic: Compares indoor vs. outdoor absolute humidity.
  • Dew Point Protection: Detects and prevents condensation risks.
  • Adaptive Runtime: Automatically adjusts (15, 30, or 60 mins) based on humidity severity.
  • Alarm Integration: Option to disable automation when the security system is armed.

:hammer_and_wrench: Requirements

This blueprint requires the Thermal Comfort Integration (available via HACS) to provide:

  • Absolute Humidity (g/m³)
  • Dew Point (°C)

[Thermal Comfort Repository]

:warning: Safety Recommendation

It is highly recommended to create a “fail-safe” automation that turns off the fan if it remains on for more than 2 hours, protecting against sensor or communication failures.


License: CC BY-NC-ND 4.0 (Free for personal use. For commercial use/installers, please contact [email protected]).

:coffee: Support the Project

If you find this project useful you can support development by buying me a coffee.

Your support helps me dedicate more time to building advanced Home Assistant tools.

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© 2026 Iakovos Venieris – Greece Sky and Weather

Open your Home Assistant instance and show the blueprint import dialog with a specific blueprint pre-filled.

That looks like just the SVG asset link, did you mean to include an example or diagram with it? Would be helpful to see how it ties into the setup.