Key points for selecting fresh air ventilation fans

1. A fresh air exchanger is a small ventilation device with a heat recovery unit for room use. The main control parameters for selection include air volume, static pressure loss, outlet total pressure, input power, effective air exchange rate, exchange efficiency, and noise level.

2. The performance of the fresh air exchanger should meet the requirements of Table 1, and the heat exchange efficiency value corresponding to the nominal air volume of the device should not be lower than the requirements of Table 2.

3. Generally speaking, when the fresh air temperature is around -10℃, frost may appear on the exhaust side; an air preheater can be installed before the device.

4. The selection of the device should also meet the relevant requirements of other standards and specifications.