Жители помещений с центральным воздушным отоплением/кондиционированием хорошо знакомы с фильтрами, которые стоят на воздухозаборнике, и которые положено менять, согласно инструкциям на них, вот так:
For best results, change your filters every 60 to 90 days but increase frequency to 30 days during peak summer and winter monthsВ то время как
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https://level9hvac.com/a-guide-to-adjusting-your-ac-fan-speed/#:~:text=Some%20HVAC%20systems%20have%20a,to%20be%20faster%20or%20slower.
Some HVAC systems have a variable-speed fan motor, in which case you won’t need to worry about adjusting the fan. However, most systems use a single-speed fan. Even though the fan only ever runs at one speed, you can still adjust this speed to be faster or slower.
"Most blower fans have three different speed settings: high, medium and low. When your system was installed, there is a good chance that the fan speed was set to high. If so, changing it to the medium setting may help reduce your high humidity issues by allowing the system to run for longer periods of time. "
В современных системах очень часто ставят override, чтобы во время, например, приготовления пищи можно было увеличить скорость вытяжки на кухне. В душевой то же самое, иногда автоматически, при высокой влажности.
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It's all theoretical anyway, I wonder how many people actually change filters at least quarterly.
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PWM?
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