These products are designed for modestly sized homes. Typically, units that have blades that measure between 40-48 inches are usually designed to be used in smaller rooms such as bedrooms and workspaces. Units that measure between 50-62 inches are used for larger spaces such as living rooms and dining rooms. If you feel like you need something that is bigger than 62 inches, it may be in your best interest to purchase more than one units for your very large space.