We live in the desert so dry air is just part of the deal. However, the air in your home can become even more dry and uncomfortable in the winter. This is because cold air cannot hold as much moisture as warm air. So although your heater does not remove humidity, it decreases the relative humidity by heating the air.
Dry air is not only uncomfortable but can also cost you money by damaging your home furnishings and increasing your energy bill. For Phoenix area residents struggling with dry air, we recommend a whole-home humidifier.