Building class
|
Cold and severe cold regions
|
Hot-summer cold-winter regions
|
Hot-summer warm-winter regions
|
Mild regions
|
---|
Constraint value
|
Guide value
|
Constraint value
|
Guide value
|
Constraint value
|
Guide value
|
Constraint value
|
Guide value
|
---|
Class A
|
Office buildings of party and government agencies
|
55
|
45
|
70
|
55
|
65
|
50
|
50
|
40
|
Commercial office buildings
|
65
|
55
|
85
|
70
|
80
|
65
|
65
|
50
|
Class B
|
Office buildings of party and government agencies
|
70
|
50
|
90
|
65
|
80
|
60
|
60
|
45
|
Commercial office buildings
|
80
|
60
|
110
|
80
|
100
|
75
|
70
|
55
|
- The running time of the system in a class A building can be reduced by opening exterior windows to utilize natural ventilation; however, class B buildings need to rely on mechanical ventilation and air conditioning systems all year round