Humidifier to reduce need for Heating

I recently read an article on MSN about increasing humidity to save on
heating since the body can tolerate lower temperature better if humidity is
higher.  Living in an apartment on the California coast, heating costs
aren't terribly high (about $30/mo) so there isn't a need to buy an
especially fancy but efficient model or one that uses too much electricity.
Any recommendations for a model suited for my purpose?