This tender invites electronic bids for the service and maintenance of air conditioning units and VRF HVAC systems at various locations including the HQ NADRA building and other associated buildings. The contract duration is one year from the date of signing the purchase order. The scope includes preventive maintenance, cleaning, inspection, repair, and replacement of parts to ensure efficient operation of HVAC systems. The bidding process follows the Single Stage Two Envelope procedure under national competitive bidding rules. Bidders must be registered with Income Tax and Sales Tax authorities and comply with FBR regulations. The tender requires submission of electronic bids via EPADS and manual submission of bid security in original form. A pre-bid meeting is scheduled for December 19, 2025, at NADRA headquarters in Islamabad.