[Class : 42] Design And Development Of Air Conditioning And Ventilation System; Consulting Services In The Fields Of Engineering, Environmental Assessment, Environmental Management, Environmental Abatement And Remedial Action, Environmental Safety, And Architecture For Infrastructure, Environment, Energy Facilities And Design/Build; Design And Development Of Air Conditioning And Ventilation System To Improve The Indoor Air Quality Of Buildings For Healthy And Energy Efficient Buildings; Design And Development Of Air Quality Monitoring System; Providing Technological Advisory Services Air Conditioning And Ventilation Services, Air Quality Monitoring Services; Testing Or Research On Prevention Of Indoor Air Pollution;