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 | |||||
| Ordinary ward | Gym | Theater & mall | Office | Computer room | Dining room | VIP room | Meeting room | |
| Personal fresh air consumption(m³/h) (Q) | 17-42 | 8-20 | 8.5-21 | 25-62 | 40-100 | 20-50 | 30-75 | 50-125 |
| Air changes per hour (P) | 1.06-2.65 | 0.50-1.25 | 1.06-2.66 | 1.56-3.90 | 2.50-6.25 | 1.25-3.13 | 1.88-4.69 | 3.13-7.81 |
Example
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.