SONGZ Tops 40,151 Bus HVAC Deliveries in 2025; Electric Units Account for 75% of Volume. LMD Secures Volvo EV Chassis HVAC Compatibility Certificate

Why It Matters

The surge in electric HVAC underscores the rapid decarbonisation of public transit, positioning SONGZ as a key supplier for next‑generation electric buses worldwide.

Key Takeaways

• 40,151 bus HVAC units delivered in 2025, 75% electric.
• Diesel HVAC sales fell to 9,757 units, reflecting decarbonisation shift.
• Volvo certificate enables LMD platform on all 8‑12 m electric buses.
• ISO/SAE 21434 cybersecurity certification obtained June 2024.
• R1234yf, R744, and R290 refrigerant lines target EU low‑GWP rules.

Pulse Analysis

The 2025 delivery figures illustrate a decisive market pivot from diesel‑powered cooling to electric heat‑pump technology. With 30,394 electric units shipped, SONGZ’s portfolio now derives the bulk of its revenue from zero‑emission solutions, mirroring global policies that penalise high‑GWP refrigerants and fossil‑fuel bus fleets. Operators in Asia, Europe and Latin America are accelerating retrofits, creating a robust pipeline that sustains the company’s growth trajectory beyond its 2017 peak.

Technical differentiation is a core driver of SONGZ’s competitive edge. The LMD rooftop platform, now certified for Volvo’s 8‑12 metre electric chassis, integrates battery thermal management, ultra‑low‑temperature heat pumps capable of -15°C operation, motor cooling, and waste‑heat recovery. Coupled with ISO/SAE 21434 cybersecurity certification, the system meets stringent safety and data‑protection standards demanded by OEMs and transit agencies, reinforcing trust in the brand’s high‑value offerings.

Regulatory compliance further fuels SONGZ’s expansion. The rollout of R1234yf, R744 (CO₂) and R290 (propane) refrigerant lines aligns with EU F‑Gas directives and emerging low‑carbon tender specifications. By establishing a dedicated CO₂ production line and advancing prototype testing for propane units, the company positions itself to capture upcoming public‑procurement contracts. Coupled with three overseas factories and localized after‑sales networks, SONGZ can satisfy UKCA, ECE and TFL requirements, ensuring a resilient supply chain as the global bus fleet electrifies.