Although these winter days may be getting slightly longer, they’re still just as cold - and there are plenty of cold days still to come before spring. For most homeowners, the key to keeping everyone warm throughout the cold season is to keep the heat running, and just standing near that heating vent can be a welcome relief from the frosty bite of a chilly afternoon. But you aren’t the only one looking to stay warm; pests love heating systems, and keeping everything from rodents to insects out of your ductwork can be a challenge all year long.