Make sure you throw on an extra sweater and a thicker pair of socks when you go outside next week. The National Weather Service is predicting the area’s coldest weather since last Christmas, when wind chills were below freezing. Beginning on Sunday night, low temperatures will struggle to stay above zero degrees, with negative readings predicted for Monday and Wednesday. With colder temperatures comes harder working furnaces, and Jeff Blemke from Ultimate Air in Luxemburg suggests you make sure your filters are clean now to save your units from wearing out faster.

Holding your home’s temperature steady, reversing the flow of your ceiling fans, and clearing obstructions away from your air vents are other ways to stay comfortable without taxing your unit. Single-digit temperatures and potential negative windchills are predicted to last through at least Thursday.