Shoveling can be a real task. I have our boardwalk, and a trail for the postman to shovel. I also have a short trail going to two fireplace vents on the side of our house. Concerning these vents, they can get clogged with ice. If they aren't kept open, a person or persons can become asphyxiated! An improperly maintained or a blocked outside vent can create incomplete combustion creating carbon monoxide. This is a toxic gas which can linger inside your house putting people at risk. I have had to clear my vents twice. The condensation of my fireplaces cause ice and snow to build up, I have to ke...