Products Supplied:
- JZD THHN Building Wire (general circuits, VFD connections)
- JZD XHHW-2 Power Cable (chiller & cooling tower feeders)
- JZD TC-ER Tray Cable (BMS sensor & actuator wiring)
Specifications & Quantities (Preliminary):
- THHN: 3.5mm² to 50mm² — 15000 m
- XHHW-2: 14mm² to 120mm² — 20000m
- TC-ER: 2×1.5mm², 3×1.5mm², 5×1.5mm² — 5000 m
Client: US HVAC contractor or building owner
Project Name: Commercial Office Tower HVAC Energy Retrofit, USA
Project Details & Narrative:
Industry Context — The HVAC Retrofit Wave
Commercial buildings account for approximately 35% of electricity consumption in the United States, with HVAC systems representing the single largest energy load. Aging office towers, hospitals, and institutional buildings are undergoing HVAC retrofits driven by:
- Rising electricity costs making energy efficiency upgrades financially compelling
- Corporate ESG commitments and green building certifications (LEED, Energy Star)
- State and local building performance standards mandating energy reductions
- Federal tax incentives (179D deduction) for energy-efficient commercial buildings
- Aging chiller plants and air handling equipment reaching end-of-life
A typical commercial HVAC retrofit replaces constant-speed equipment with variable-speed alternatives (VFD-driven chillers, fans, pumps), installs advanced Building Management Systems (BMS), and upgrades electrical infrastructure to support new equipment.
Why Cable Selection Matters in HVAC Retrofits
| Retrofit Element | Cable Demand | Critical Requirement |
| VFD-driven chillers & fans | Shielded power cable to VFD motors | EMI containment to prevent interference with BMS and tenant IT systems |
| Cooling tower pump feeders | Outdoor-rated cable | UV, moisture, and temperature resistance |
| Rooftop air handling units | High-temp rated cable | Roof temperatures exceed 50°C in summer; conduit temps even higher |
| BMS sensor & actuator network | Multi-conductor control cable | Signal integrity over long runs (roof to basement BMS panel) |
| Energy metering & sub-metering | Dedicated circuits | NEC and local code compliance |
The Project
In 2025 year], contractor] was awarded the HVAC retrofit contract for a commercial office tower in USA. The retrofit scope:
- Replacement of constant-speed chillers with VFD-driven magnetic bearing centrifugal chillers
- Cooling tower upgrade with VFD-controlled fans
- Air handler conversion from inlet guide vanes to VFD-driven supply/return fans
- Installation of new BMS with over [待确认] monitoring points
- Energy metering system with tenant sub-metering
How JZD Cable Won
- Complete Cable Package: JZD provided THHN (branch circuits), XHHW-2 (chiller/cooling tower feeders), and TC-ER (BMS control wiring) from a single supplier — reducing procurement complexity.
- VFD Cable Expertise: JZD’s shielded TC-ER was specified for VFD motor connections where EMI control was critical for the new BMS system. The contractor valued JZD’s technical guidance on shield grounding best practices.
- XHHW-2 for Rooftop/Outdoor Applications: The cooling tower and rooftop AHU circuits demanded XHHW-2 for its 90°C wet rating and UV-resistant XLPE insulation — a specification-driven choice where JZD’s product met the requirement at competitive pricing.
- Fast Lead Times: The retrofit’s tight construction schedule required expedited production — JZD committed to [待确认 — weeks] manufacturing lead time.
- Documentation Completeness: UL certificates, ampacity tables, and installation guidelines were provided upfront, supporting the electrical contractor’s submittal process.
Outcome
Post-retrofit, the building achieved:
- 5% reduction in HVAC energy consumption
- LEED [Gold/Platinum] certification
- BMS commissioning completed without signal interference issues
- All cable installations passed inspection first time
The mechanical contractor has since specified JZD Cable for additional HVAC retrofit projects.
About JZD Cable
JZD Cable is a professional cable manufacturer with over 20 years of experience, headquartered in Shenzhen, China. We produce a full range of UL-certified building wires — THHN, THWN-2, XHHW-2, NM-B, TC-ER — and export to Southeast Asia, the Pacific, the Middle East, Africa, and the Americas. Our factory operates under ISO 9001 quality management, with every shipment backed by complete certification documentation and batch traceability.
Need certified cables for your next construction or industrial project? Contact JZD Cable for a customized quotation, free sample evaluation, or technical consultation.
