Cpcb , Delhi Invites Online Bids For Comprehensive Annual Maintenance Contract ( Camc ) For Air Conditioners In Parivesh Bhawan And Air Quality Monitoring Station ( Aaqms ) In Delhi , Amc Of Window Air Conditioners 1 . 5 Ton , Amc Of Split Air Conditioners 1 . 5 Ton , Cassette Unit 3 . 0 Ton , Cassette Unit 5 . 0 Ton