Certain humidifiers have their own source of heat (like a steam humidifier), while others use heat from the HVAC system to evaporate moisture into the air. It is therefore important to account for any humidifier that does not have it's own source of heat (like a bypass humidifier).
If the HVAC System contains one of these humidifiers then select "Yes" and enter the desired indoor humidity level. If you do not know what this value is, Cool Calc will automatically set a default humidity level for the home.
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