docs: for PR #5228

ACKNOWLEDGEMENTS.md

@@ -835,3 +835,4 @@ Further device support has been made with the assistance of users. Please consid
 - [bakerlee](https://github.com/bakerlee) for contributing support for Verminpool pool heat pump.
 - [EnO33](https://github.com/EnO33) for contributing support for Intex PureSpa inflatable spa.
 - [vanyasvl](https://github.com/vanyasvl) for contributing support for Afyeev 32A 7kW EV charger.
+- [Flechaa](https://github.com/Flechaa) for contributing support for HTW IX75B air conditioner.

DEVICES.md

@@ -132,6 +132,7 @@
 - Goldair GCPAC350W portable air conditioner
 - Haier Airmart wall air conditioner
 - Hokkaido HKEDM 263 ZL air conditioner
+- HTW IX75B air conditioner
 - Idea Heating Belt (with CS1 USB dongle)
 - Ideal Clima TQCT07 fancoil air conditioner
 - Igenix IG9901WIFI portable air conditioner