Thermal collector, alternatively called a cazzo or thermal trap, suitable for increasing thermal efficiency in wood stoves and pellet stoves. It utilizes the high temperature of the exhaust gases from a stove and emits it into the room thanks to its special design, which increases the overall efficiency of the installation. It is easily and quickly installed on the stove pipe, taking advantage of the smoke temperature, thus recovering the lost combustion energy from the pipes, allowing the room air to pass through it.

It is enamelled, meaning the material resulting from the application of enamel (glass) onto metal. This results in protection from rust, while also offering great durability over time.