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Seek Thermal (Scroll down to see video) Plug this thermal camera into your smartphone, open its app, and look through walls, floors, and ceilings for gaps in insulation, water leaks, or—show-off!—cool spots on the grill. About $249; Manufactured by Seek Thermal, available at The Home Depot Learn more about the Seek Thermal Compact Thermal Imaging Camera in the video below. brightcove.createExperiences();