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Product Selection

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.


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