The Arctic Hayes Smoke Stick Kit is a precision smoke testing tool designed for detecting air movement, gas spillage and CO spillage in heating and ventilation systems. This innovative kit produces a pencil-thin smoke pattern, making it ideal for identifying even the slightest air movement or gas leakage in tight spaces and around appliances. The non-corrosive, non-harmful smoke is particularly suited to mandatory CO spillage checks on boiler and case seals following installation or maintenance work. HVAC engineers will also find it invaluable for air movement and leakage testing in ventilation systems, where precise smoke visualisation is essential for accurate diagnostics. Each kit includes one Smoke-Pen and three Smoke-Sticks, providing up to three hours of controllable smoke generation. The replaceable stick design offers excellent value, with refill packs available separately to extend the working life of your Smoke-Pen. Features and Benefits:Pencil-thin smoke pattern for preci