Three Yan air conditioning, a unique design concept, for users to consider carefully designed set of energy-efficient, reliable and fresh air fresh air straight through the device, the use of change sets of equipment to solve the deterioration of indoor air quality problems. Features: 1. The two-way ventilation function: to achieve a two-way ventilation of indoor and outdoor, the outdoor fresh air into the room. While the interior dirty gas into the room, creating a new, healthy green space for you. 2. Efficient Energy Recovery: Built-efficient heat recovery can complete the entire heat or heat recovery, the whole is greater than 70% heat recovery efficiency, heat recovery efficiency of greater than 63%; new wind energy to reduce the processing required to achieve energy efficient. 3. Low noise design: built-in air-conditioning for low-noise fan, the machine housing wall is covered with a new type of sound-absorbing material, all quiet design, humane embodies three swallow air conditioning superb design techniques. 4. Air filtration and purification function: coarse, medium and high efficiency filters to choose from, to prevent dust and other contaminants from entering the interior, you create a clean environment. 5. The whole family, multi Specifications: According to different application environments, with a variety of styles for you to choose from.