1,000‑Bed Hospital Cuts HVAC Energy 28% with Dual Recovery + Precision Control

If you are planning a healthcare facility or upgrading an existing one, this real‑world example shows how to simultaneously achieve:

• Deep energy savings (28% verified reduction)

• Strict infection control (stable 5 Pa pressure differentials)

• Precision environments (±1°C / ±5% RH) in ORs and ICUs

• Low lifecycle costs with predictive, IoT‑enabled management

Capital Medical University Beijing Anzhen Hospital Jilin Branch – a 1,000‑bed national cardiovascular center in Northeast China – needed an HVAC system that could run 24/7 in –30°C winters, maintain sterile conditions for immunocompromised patients, and meet China’s Green Building Three‑Star standard. Traditional systems wasted heat, struggled with pressure stability, and consumed excessive energy.

Zone‑specific matching:
Large public areas use high‑efficiency screw chillers/heat pumps (COP≥3.24). General wards and consultation rooms employ digital energy‑recovery AHUs with liquid‑loop recovery (>60% efficiency). Critical zones (OR, ICU, labs) use modular AHUs with multi‑stage filtration and precise T/H control.

Two‑level energy recovery:
At the main‑unit level, condenser waste heat is reclaimed to produce domestic hot water – eliminating boilers. At the terminal level, liquid‑loop recovery pre‑conditions fresh air using exhaust energy. Together, these cut total HVAC energy consumption by 28%, verified by third‑party testing.

Infection control:
Real‑time pressure monitoring keeps differentials at 5 Pa, ensuring airflow from clean to contaminated areas. Multi‑stage filtration and humidity control (within ±5%) prevent microbial growth – directly lowering hospital‑acquired infection risks.

Smart controls:
The system self‑adjusts to real‑time loads, predicts faults (filter clogging, refrigerant issues), and supports remote IoT access for parameter tuning. This reduces manual oversight and emergency repairs.

• Owners/planners: A proven path to green certification with verifiable energy data.

• Consultants: Real performance figures for liquid‑loop recovery in extreme climates.

• Facility managers: Practical pressure‑control strategies and predictive diagnostics.

• Operators: Lower lifecycle costs – 28% energy savings + no boiler fuel + extended equipment life.

Holtop provided BIM‑based pre‑sales design, on‑site commissioning (3 weeks ahead of schedule), operator training, and a local spare‑parts warehouse with 4‑hour response. Post‑occupancy testing confirmed all targets were met.

Q: Does it work in warm climates?
A: Yes – equipment operates from –30°C to +45°C; recovery efficiency is even better in cooling mode.

Q: Payback period?
A: 4.2 years for this project, from energy and fuel savings.

Q: Compatible with existing BMS?
A: Yes – supports BACnet, Modbus, etc.

Holtop – Healthy, low‑carbon air environments for healthcare worldwide.