ERV / HRV Product Selection Guide
1. Choose the proper installation types based on the building structure;
2. Determine the fresh airflow required according to the use, size and number of persons;
3. Select the right specifications and quantity according to the determined fresh airflow.
Airflow required in residential buildings
|Rooms type||Non-smoking||Slight smoking||Heavy Smoking|
|Personal fresh air
|Air changes per hour
The area of a computer room is 60 sq. meters (S=60), the net height is 3 meters (H=3), and there are 10 persons (N=10) in it.
If it is calculated according to “Personal fresh air consumption”, and assume that: Q=70, the result is Q1 =N*Q=10*70=700(m³/h)
If it is calculated according to “Air changes per hour”, and assume that: P=5, the result is Q2 =P*S*H=5*60*3=900(m³)
Since Q2 > Q1 , Q2 is better for selecting the unit.
As to special industry such as hospitals (surgery and the special nursing rooms), labs, workshops, airflow required should be determined in conformity with regulations concerned.