12. ANNEX
The follow CO2 value are for the requirement
for different environment, however it is for
reference only.
Building, office, home
≦
1,000 PPM
School
≦
1,500 PPM
Hotel, public area
≦
1,500 PPM
Indoor swimming pool
≦
1,500 PPM
ASHRAE
≦
1,000 PPM
WHO
≦
920 PPM
13. PATENT
The meter ( SD card structure ) already get
patent or patent pending in following
countries :
Germany Nr. 20 2008 016 337.4
JAPAN
3151214
TAIWAN M 358970
M 359043
CHINA
ZL 2008 2 0189918.5
ZL 2008 2 0189917.0
USA
Patent pending
20
0911-MCH383SD