For in-store pickup only, with stock and pricing varying by ZIP code, Lowe's offers the Black & Decker Thermal Leak Detector
, model no. TLD100, for $29
. That's tied with an expired mention from Black Friday (which included shipping) and the lowest total price we could currently find by $9. Sales tax is added where applicable. This device purports to protect your home from energy loss by evaluating temperature drops or rises in a room.