Armstrong Design Envelope pumps were selected to retrofit this 80,000 m² office and hotel complex. Because the hvac system is required 24/7 to support hotel operations, ease of installation and minimal labour were important considerations. Armstrong upgraded the existing equipment with 10 Design Envelope 4300 pumps and an IPC 9521 controller.

Armstrong solutions reduced energy usage by 75%. These energy savings reduced the payback period for the retrofit project to less than two years.

Armstrong maps each individual pump’s hydraulic, motor and inverter variations at the factory to achieve exceptional accuracy throughout the flow range.

With this calibration, Armstrong Design Envelope pumps also serve as flow meters, providing reliable system flow data (+/- 5%). The testing ensures optimal performance efficiency at start-up, while Armstrong’s Pump Manager helps maintain and extend efficiency throughout the pump’s operating life.

Quick Stats

Facility type: Hotel and office complex

Location: Zhengzhou, China

Size: 80,000 m²

Power consumption savings: 75%

Annual cost savings: RMB 193,404

Annual CO₂ reduction: 212,452 kg CO₂

Equipment

• 10 × Design Envelope Vertical In-Line 4300 pump with Suction Guide and Flo-Trex valve

Key Outcomes

• Bureau Veritas reviewed the energy usage data and certified the efficiency improvement of 75%
• The cost savings will be RMB 193,404 per year (approx $28,000 USD)