The TwinFresh Expert RW1-100-2 V.2 is a state-of-the-art 50 CFM (max) Energy Recovery Ventilator (ERV) designed to provide you with a continuous supply of fresh, filtered air, all the while helping to reduce your energy costs. Wi-Fi enabled, it will provide ventilation for single rooms of up to 750 square feet. Perfect for new builds, renos, apartments, cottages and tiny homes. No ducting required