Polar Vortex Returns for Another Unwelcome Visit

From Aprilaire, the experts in indoor air quality: As the U.S. prepares for another polar plunge, humidity control is an important aspect of indoor comfort.Madison, WI-- In the first week of a new year, much of the nation has seen temperatures plunge as frigid arctic air dips south.  Early predictions by AccuWeather  suggest the polar vortex will slip down for multiple blasts of cold air this winter, delivering weather very reminiscent of early 2014. The one bit of good news is that the mass of arctic air