Characteristics of Total Heat Exchanger
The total heat exchanger utilizes the heat and moisture exchange between the exhaust air and the incoming fresh air to recover energy. During winter operation, when the indoor exhaust is filtered and then treated by a heat recovery rotor, the temperature of the rotor increases and the moisture content increases. When the rotor rotates through the cleaning fan and comes into contact with fresh outdoor air, it releases heat and moisture to the low-temperature fresh air, causing the air to warm and humidify. Its recycling efficiency can reach 70% to 90%. In summer, on the contrary, by reducing the temperature and humidity of the fresh air and exchanging heat, the energy consumption of the air conditioning system can be reduced, achieving the goal of energy conservation.
Selection Guide

When determining the required fresh air volume for a room, it should be considered comprehensively based on the size of the room space and the number of people inside. According to the recommended data in the table above, calculate the fresh air volume values based on "required fresh air volume per person" and "room fresh air exchange rate", and take the larger of the two as the basis for equipment selection. A certain computer room has an area of S=50 (m2), a net height of h=3 (m), and n=12 personnel. If calculated based on the required fresh air volume per person, taking the required fresh air volume q=50 (m3/h) per person, then the fresh air volume
Q1=n·q=12×50=600（m3/h）。
If calculated based on the fresh air exchange rate of the room, take the fresh air exchange rate of the room as p=4.5 (times/h).
Then the fresh air volume Q2=p · s · h=4.5 × 50 × 3=675 (m3/h).
Due to Q2>Q1, Q2 (i.e. 675m3/h) is taken as the equipment selection parameter data