| CPC F24F 11/0008 (2013.01) [F24F 11/52 (2018.01); F24F 11/64 (2018.01); F24F 2110/12 (2018.01); F24F 2110/20 (2018.01)] | 20 Claims |

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1. A system, comprising:
a humidification device configured to modify an indoor air humidity within a building; and
a controller communicably coupled to the humidification device, the controller configured to:
determine a non-linear control function of indoor air humidity as a function of outdoor air temperature based on a user input;
limit a maximum allowable value of a user-defined air humidity setting based on the non-linear control function;
receive a real-time outdoor air temperature; and
control the humidification device to modify the indoor air humidity using the non-linear control function.
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