
Annex 4 Table of recommended wind speeds for central air-conditioning
Annex 5 Criteria of environment noise in urban areas
Annex 6 Table of recommended diameter for condensate water pipes
Annex 3 Max. flow velocity at the air outlet (unit
Place Pan outlet Ceiling outlet Side outlet
Broadcasting studio 3-3.5 4-4.5 2.5
Hospital ward 4-4.5 4.5-5 2.5-3
Hotel room, parlor 4-5 5-6 2.5-4
Department store, theater 6-7.5 6.2-7.5 5-7
Classroom, library, office building 5-6 6-7.5 3.5-4.5
Annex 2 (2) Heat load indexes designed for air-conditioning in some of the Chinese buildings
No.
Building type Heat load index
No.
Building type Heat load index
and room name W/m
2
and room name W/m
2
1 Office building,school 58-80 6 Store 64-87
2 Residential building 46-70 7
Single-floor
85-105
residential building
3 Hospital, kindergarten 64-80 8 Dining room 116-140
4 Hotel 58-70 9 Cinema 93-116
5 Library 46-76
Min. slope of pipes Cooling load (kW)
0.001 <18 <100 <176 <598 <1055 <1512 <12462 >12462
0.003 <24 <230 <400 <1100 <2000 < 3500 < 15000 > 15000
Nominal pipe
DN25 DN32 DN40 DN50 DN80 DN100 DN125 DN150
diameter (mm)
Category Scope of application Daytime (dB) Nighttime (dB)
0 Sanatorium, top-grade villa, top-grade hotel 50 40
1
Areas intended mainly for residence,
55 45
culture & education,business and industry
2 Areas intended for residence, 60 50
business and industry
3 Industrial estate 65 55
4
On both sides of urban roads
70 55
and traffic arteries
Position
Recommended wind speed (m/s) Max. wind speed (m/s)
Residential Public
Factory
Residential Public
Factory
building building building building
Air duct inlet 3.5 4.0 5.0 4.5 5.0 7.0
Fan outlet 5~8 6.5~10 8~12 8.5 7.5~11 8.5~14
Main air duct 3.5~4.5 5.0~6.5 6~9 4~6 5.5~8.0 6.5~11
Branch air duct 3.0 3.0~4.5 4.5 3.5~5.0 4.0~6.5 5~9
Fresh air inlet 3.5 4.0 5.0 4.0 5.0 7.0
Air outlet from
2.5 3~3.5 4.0 3.25~4 4~6 5~8
the branch duct
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