Does this value change during the winter time when the heater is on?
-
It is different because the amount of moisture per volume air is different inside your house compared to the air outside your house. The lower the dew point temperature, the less moisture is in the air.
Yes, a heater can cause the dew point to change, but indirectly. In order for the dew point to change when you turn on the heater in your house, you must have a liquid water source available. The increase in temperature in a house would increase the evaporation rate of liquid water that is exposed to this warming air. So you need both an increase of temperature and also have water available to be evaporated to the air.
One of the fastest way you can increase the dew point in your home is to fill a sink or bathtub with hot water and you can watch the dew point rise rather quickly in your home.
Yes, a heater can cause the dew point to change, but indirectly. In order for the dew point to change when you turn on the heater in your house, you must have a liquid water source available. The increase in temperature in a house would increase the evaporation rate of liquid water that is exposed to this warming air. So you need both an increase of temperature and also have water available to be evaporated to the air.
One of the fastest way you can increase the dew point in your home is to fill a sink or bathtub with hot water and you can watch the dew point rise rather quickly in your home.
-
because there would be a different humidity indoors than outdoors, creating a different dew point