Author: steveng We have found a number of uses for old BoatSafe Heaters: Target Practice Planter – Using a drill, remove the rivets holding the top cover over the resistive heating element. Invert the cover, and fill with soil. The “5×5” vents offer terrific drainage. Wheel Chocks (safe for small, light vehicles only) Was this answer helpful ? Yes (0) / No (0) How do I install my heater?