Ventive provides an innovative solution to the problem of energy efficient ventilation in the built environment. Its primary product is a patented device, Ventive S, which fits into a chimney cavity and encourages fresh air circulation while retaining heat inside the building, thereby providing ventilation without the need for an additional power source.  The company’s new product, Ventive S+, uses the same technology but does not rely on chimneys being present within the building.