Annual Maintenance & Operation of HVAC and Refrigeration System at Parliament House, New Delhi., During 2024- 25, SH: Annual Comprehensive Maintenance of Walk- in- chiller & Freezer of Blue Star make in Samvidhan Sadan. Annual Maintenance & Operation of HVAC and Refrigeration System at Parliament House, During year- 2024- 25, SH: Annual Comprehensive Maintenance of Walk- in- chiller & freezer of Blue Star make in Samvidhan Sadan.