Vents TwinFresh MERV 5 OEM Replacement Filters - 2 Pack provides original Vents MERV 5 filters specifically designed for TwinFresh Comfo and TwinFresh Expert ductless energy recovery ventilators. These filters come in a convenient pack of two, ensuring you always have a replacement on hand. Easy to install, these filters effectively maintain the performance and efficiency of your ventilator system. Select between the Comfo or Expert models to fit your specific unit.