This tender invites qualified bidders in Karachi for the supply and installation of HVAC systems and associated plant machinery at the Sindh Institute of Animal Health under ADP scheme No. 1509. The procurement covers HVAC works for Killed Vaccine Unit, Live Vaccine Units Blocks A & B, and LSD and Bacterin Units, including supply of air handling units, ducting, electrical wiring, BMS integration, fire and safety systems, and revalidation of existing HVAC infrastructure. The scope includes detailed installation, testing, balancing, commissioning, and a two-month test run to ensure system performance meets design specifications. The project demands adherence to international standards such as ASHRAE, SMACNA, and NFPA, with all equipment conforming to approved manufacturers and local regulations. Bidders must be registered with Pakistan Engineering Council in category C-3 or above with relevant specialization codes and be active taxpayers with valid FBR registration. The tender requires submission of a bid security of PKR 6,100,000 and performance security of 5% of contract value. The evaluation will follow a single stage two envelope procedure with 80% weightage to technical and 20% to financial proposals. Technical criteria include company experience, PEC registration, financial strength, and conformity to technical specifications. PEC Category C-3 or above with specialization codes ME-01, CE-10, BC-01 is mandatory. Bidders must be on the Active Taxpayer List and provide professional tax certificates. The tender is governed by Sindh Public Procurement Rules and World Bank Standard Bidding Documents. Submission deadline is 03 February 2026 at 02:00 PM with bid opening at 02:30 PM at the Committee Room of Sindh Institute of Animal Health, Korangi, Karachi. Bids must be submitted online via EPADS portal and hard copy delivered to the Director General's office. Pro-Tip: Ensure all technical documents, including manufacturer authorizations, PEC certificates, and financial statements, are complete and properly signed. Pay close attention to the detailed HVAC technical specifications and approved manufacturers list to avoid disqualification. Also, verify the bid security validity and submission format to comply with SPPRA rules.