At this time of year, we all want to do everything we can do keep heating costs affordable! Here’s an inexpensive way to keep your HVAC costs down! Right now, get 3M Indoor 2- Window Insulator Kit for only $4.98 as an Add-on item. Add-on items ship with qualifying purchases over $25. You’ll be saving $8.43 cents on this kit! Included: (1) 5.16′ x 7′, (2)