Positive pressure. Smartvent Lite, Positive and Evolve2 are suitable for most homes and particularly well suited to older homes where timber joinery and older aluminium joinery allow air to be forced out more easily and create better air circulation.
Balanced or Energy Recovery. Smartvent Synergy2 and Balance are particularly suited to modern homes that are better insulated with modern joinery which results in homes being more airtight. In these situations these systems are a complete solution (with active extraction) to achieving an optimum healthy home environment.