We’ve experienced some bitter cold of late. That probably means your furnace is running 24 hours a day, and if you aren’t properly insulated, you are going to have a rather high heating bill. Energy efficiency and proper weatherization can make a huge difference, and Washtenaw County has an assistance program that can make an assessment and do the repairs completely free for qualified residents. WEMU's David Fair talked it over with Washtenaw County Housing Program Supervisor Aaron Kraft.