Smoke Pencil Pro Draught Detector KitIf youre on a mission to reduce air leaks at home or in the workplace, knowing how to find a draught is essential. It can lead to a more comfortable, healthy and less costly way of life. Finding obvious air gaps might be an easy task, but to properly air seal a building, the less obvious air leaks also need to be identified. Whether youre testing air pressure for a Passivhaus development or draught proofing your current home, a Smoke Pencil Pro allows