The humidifier you had in your house was probably a warm mist humidifier, which works by boiling water and outputting a distilled steam throughout your home to prevent your furnace from drying out the air.
Because warm mist humidifiers do expel steam, they can actually help to warm the air in your home while regulating humidity levels.
- If you are considering investing in a humidifier to help your home feel warmer, be sure to install a warm mist humidifier, not a cool mist humidifier.
- A cool mist humidifier would actually cause your apartment to feel colder.
It is also true that humidifiers can prevent sinus irritation caused by dry winter air. They help by preventing dust and allergens from being kicked up as easily as well as by preventing your sinuses from drying up and becoming uncomfortable.
For more information:
Read "How can I humidify my home naturally?" a Q&A answered by Michael Holcomb.
Also, for information on purchasing a humidifier, check Joel Wensley's humidifier buyer's guide here.