When are humidifiers recommended?

We hate humidity in summer, but really need it in winter. Many homes can become drier than the Sahara Desert ! That can crack your furniture and woodwork and cause static electricity. It can cause irritated nasal passages, and allows germs, dust and other light materials to float through the air. Plus, the too-dry air feels colder, so you raise the thermostat, costing you money. A central air humidifier will increase your health, reduce your heating bills, and keep your furniture, and you, in much better condition.