Black & Decker TLD100 Thermal Leak Detector
If you’ve got a room which feels perpetually cold, there’s probably a draft leaking in from a door, window, duct, or hole in the wall. The TLD100 Thermal Leak Detector is addictively fun to use, operating in a point-and-shoot method; red for warmer spots and blue for cooler spots. Sealing up those draft leaks can equal not only a warmer room, but can also help reduce the heating bill by 20%. Not bad for a $30 investment.