Jessica Natural SN is the evolution of a very successful model that has over 2000 installations in Europe, Canada and Japan. This new version, distinguished by the abbreviation SN, is even more efficient than the previous one and is waterproof, in order to be installed without problem in new houses with low energy consumption which often adopt a controlled mechanical ventilation system. In fact, the Jessica Natural SN's combustion circuit draws the air necessary for combustion, post-combustion and window cleaning from the outside. Jessica Natural SN, like the others in the Natural range from the manufacturer Laminox, is fed by gravity: under the effect of gravity, the pellets present in the tank replace the pellets at the end of combustion, rejecting them into the ashtray.