Take snow melting on your roof, meaning a heat leak and wasted cash. You want to buy a thermal camera, but they're expensive at $4k to $40k. A single pixel came

Take snow melting on your roof, meaning a heat leak and wasted cash. You want to buy a thermal camera, but they're expensive at $4k to $40k. A single pixel camera would be fine for you -- you wouldn't mind waiting a couple minutes for it to move the sensor around.