How to Reduce Hospital HVAC Energy Use While Maintaining Clean Air

From May 23 to 25, our team attended the 27th China Hospital Construction Conference (CHCC) in Tianjin.

When talking with hospital facility managers at the event, energy consumption was always a main topic of discussion. Research shows that a Grade-A hospital in China uses about 185 to 211 kWh/(m²·a) [4]. Out of that total, HVAC systems alone account for 40% to 50% [5][6].

Balancing clean air requirements with lower energy bills is difficult. Here is a practical look at the equipment we presented at CHCC to address this issue.

Purification Air Handling Units (AHU)

In areas like operating rooms and ICUs, hygiene is a basic requirement. Our purification air handling units are built according to the German VDI 6022 and DIN 1946 ventilation hygiene standards.

To prevent air leakage, we use a frameless design that meets the EN 1886 mechanical standard. The cabinet leakage is kept at the Class 3 level under the BS EN 1751:2014 standard [1]. This tight seal helps prevent aerosols from building up or leaking inside the unit.

3-Pipe DC Inverter DX Air Conditioning Units

For hospital rooms that need stable temperature and humidity, the equipment needs to respond to load changes accurately.

This unit uses DC inverter technology. The compressor operates between 20Hz and 120Hz, adjusting its output based on the actual room load. It handles air volumes from 5,500 to 95,000 m³/h and cooling capacities up to 509kW. For installation flexibility, it supports a maximum piping length of 50 meters and a 25-meter drop [2]. We also use an electronic expansion valve to control the reheat temperature smoothly.

Air-Cooled Modular Heat Pumps with Heat Recovery

Heating and hot water take up a lot of hospital energy. Instead of using separate systems, this unit combines them.

The heat pump uses an Enhanced Vapor Injection (EVI) compressor. This allows the unit to run reliably even when the outside temperature drops to -35°C. It can produce hot water up to 62°C [3]. By recovering condensing heat during the cooling process, it provides hot water without running a separate boiler, saving daily energy costs.

Compact Medical Precision Air Conditioners

Our all-in-one medical precision AC integrates ventilation, temperature control, and purification into one compact unit. It can be installed without needing a separate plant room, making it much easier for older buildings to upgrade their air quality.

Case Study: Dominican Republic Hospital We recently supplied our air heat recovery units to a hospital in the Dominican Republic. This facility is busy, serving about 15,000 patients every day. By using efficient heat recovery technology, we minimized their need to run additional heating or cooling equipment. This directly lowered the hospital’s daily operational expenses [7].

Summary

Cutting hospital HVAC energy use by half while maintaining strict air quality is a matter of using the right engineering standards and equipment. By focusing on heat recovery, inverter technology, and sealed unit designs, hospitals can lower their running costs without compromising patient safety.

References & Source Data

• [1] Hygiene and Ventilation Standards: FlaktGroup overview of VDI 6022 and DIN 1946-6 standards; BS EN1751:2014 leakage rate standards (Class 3). Source 1 | Source 2

• [2] Holtop Equipment Specifications: DC-Inverter DX Air-Handling Unit Catalogue. Confirms 20-120Hz frequency, 50m max piping, 25m drop, and operating ranges. Source PDF

• [3] Holtop Modular Chiller & Heat Pump Data: Holtop Catalog Modular Chiller. Details -35°C extreme cold operation and EVI technology. Source PDF

• [4] Hospital Energy Baseline Research: Wei Yuejie, et al. Analysis of Hospital Building Energy Consumption and Energy Saving Potential. Refrigeration, 2025, 44(1): 9-15. Confirms Grade-A hospital average energy use is 185~211 kWh/(m²·a).

• [5] Hospital Energy Measurement in Cold Regions: Wang Yulai, Li Yongan. Energy Consumption Analysis and Energy-Saving Strategies for Large Hospitals in Cold Regions. Building Energy Efficiency, 2020, 48(7): 128-133. Confirms HVAC accounts for 40%~50% of total energy.

• [6] Hospital Energy Prediction Model: Bao Xiaoxin, et al. Influencing factors and benchmark evaluation methods for hospital energy consumption. DOI: 10.12458/HDPR.202503019.

• [7] Holtop International Case Study: Holtop Supplies Air Heat Recovery Units to Dominican Hospital. Details the energy savings for a facility serving 15,000 patients daily. Case Study URL