HVAC (HVAC)

HVAC stands for heating, ventilation, and air conditioning, the umbrella term for building climate-control systems including split air-conditioners, central chillers, packaged rooftop units, variable refrigerant flow (VRF) systems, and air-handling units. In Indian commercial e-waste, HVAC represents one of the largest single material streams by weight, particularly from office refurbishments, hotel renovations, and decommissioned IT facilities.

Material composition of a typical 5-ton split system: Total weight roughly 80-110 kg. The indoor and outdoor coils together contribute 15-25 kg of refrigeration-grade copper tubing (worth Rs 11,000-18,000 at recent scrap rates), 8-12 kg of aluminium fins, 30-40 kg of cold-rolled steel chassis and panels, 4-6 kg of copper-aluminium motor windings, 5-8 kg of mixed PCB and controller electronics, and 1.5-2.5 kg of HFC refrigerant (R-22 or R-410A depending on vintage). Large central chillers can exceed 2-3 tonnes per unit, with proportionally more copper and steel.

End-of-life process sequence: Refrigerant recovery is always the first step (mandatory under the E-Waste Rules and the Ozone Depleting Substances Rules); see HCFC and HFC entries for refrigerant-specific protocols. Next, the compressor is removed intact for separate handling because it contains a sealed mineral or polyolester oil charge that must be drained and the motor windings recovered separately. The condenser and evaporator coils are then fed to a coil-stripping machine, which mechanically separates the copper tube from the aluminium fin at recovery rates of 95%+. The steel chassis is baled and sold to mills, the motor laminations are processed via standard motor-recycling lines.

Trade-offs and failure modes: Informal Indian operators frequently bypass refrigerant recovery to access the copper coils faster, releasing the entire refrigerant charge to the atmosphere and contaminating the dismantling area with oil mist. A coil-stripping machine costs roughly Rs 8-15 lakh INR; without one, manual coil stripping is slow and contaminates the copper with aluminium, dropping the gate price from Rs 700+ to Rs 450-500 per kg. HVAC also contains glass fibre insulation and condensate-pan biofilm that require disposal as municipal solid waste under Pollution Control Board guidance.