Holtop Purification Ventilation Systems Protect Your Health

Since the outbreak of the COVID-19 in 2020, HOLTOP has successively designed, processed and produced fresh air purification equipments for 7 emergency hospital projects including Xiaotangshan Hospital, and offered the supply, installation and guarantee services.


HOLTOP purification ventilation equipments deliver clean air for medical staffs and patients and reduce the virus transmission rate. At the same time, the exhaust air is more clean and safe to discharge.

Purification ventilation systems in emergency medical areas require more rigorous design, more stringent product requirements, and comprehensive service guarantees, which can ensure the precise and stable operation of purification ventilation equipment and greatly reduce virus infection.

Solution Design, System Planning

According to the project experience of more than 100 hospitals, including Xiaotangshan, 301 Hospital and Union Hospital, Holtop designs and produces equipment scientifically and practically. 

Equipment Manufacturing and Quality Assurance

HOLTOP has the largest fresh air purification equipment production base in Asia. Strong equipment manufacturing capabilities and strict equipment quality control process ensure the high quality of emergency medical purification ventilation equipment.

24-Hours and 360-Degree Service Guarantee

HOLTOP has more than 30 sales and service agencies nationwide who can offer professional technical support and after-sales service in time which ensures the proper operation of the fresh air purification system in all directions.


1. Requirements for the Ventilation System of Emergency Medical Facilities


1) Strict Zoning, Scientific Ventilation Path

According to the sanitary safety level, it is divided into clean area, restricted area (semi-clean area), and isolated area (semi-polluted area and polluted area). Corresponding sanitary channels or buffer rooms should be set up between adjacent areas.


2) Different Areas Adopt Different Ventilation Environments

The pressure difference (negative pressure) of rooms with different pollution levels is not less than 5Pa, and the degree of negative pressure from high to low is the ward bathroom, ward room, buffer room and potential pollution corridor.


The air pressure in the cleaning area should be positive relative to the outdoor air pressure. In areas with differential pressure, a micro differential pressure gauge should be installed in the visual area of the outside personnel, and an obvious indication of the safe differential pressure range should be marked.


The layout of the air inlet and exhaust outlet of the negative pressure isolation ward should comply with the principle of directional airflow. The air inlet should be located in the upper part of the room, and the air outlet should be located near the bedside of the hospital bed, so that the polluted air can be discharged as soon as possible.


3) Temperature and Humidity Adjustment Makes the Fresh Air More Comfortable

Emergency medical facilities should adopt independent direct expansion air-cooled heat pump units, and adjust the supply air temperature according to room temperature control. Auxiliary electric heating device should be installed in severe cold area.



2.HOLTOP Customized Ventilation System Scheme for Emergency Medical Facilities


1) Reasonable Installation to Avoid Return Air Leakage

In order to prevent the leakage of bacterial exhaust air and cross infection in the diseased area, it is required that the air-conditioning exhaust fan unit is installed outside the building, and the entire return air duct is in a negative pressure section. The suitable products for the emergency project should be an outdoor floor standing air handling unit.


2) Scientific Zoning Reduces Virus Transmission

In order to ensure the pressure gradient between different safety levels, fresh air and exhaust air systems should be set respectively, and the positive and negative pressure of the area should be controlled according to the new exhaust air ratio.

Horizontal supply and vertical exhaust system
Each floor has an independent fresh air ventilation system, and the exhaust air from each room is vertically discharged to the roof. Applicable to infectious wards, high-air discharge after high-risk air sterilization.

3) Provide Cold and Heat Source Indoor Environment Can be Adjusted According to Demand

In order to shorten the construction period and ensure the stable performance of the equipment, HOLTOP purification ventilation equipment uses air-cooled heat pump direct expansion units as the cold and heat source of the air supply system. At the same time, considering the extreme winter weather in northern regions, electric heater should be installed.

 4) Multi-Purification Section Combination to Supply Clean Air

Considering the severity of the current new COVIN-19 epidemic situation and design technical requirements, the filter combination should use G4 + F7 + H10 three-stage purification.

Supply air functional section: G4 + F7 + evaporator + electric heating (optional) + blower + H10 (to ensure the cleanliness of the air supply). In the room with high purification level requirements, H13 high-efficiency air supply port is used.

Exhaust air functional section: high-efficiency return air filter (to prevent virus spread), outdoor silent high-efficiency centrifugal fan.


 3. The New Hospital Ventilation System with heat recovery to save energy - Holtop Digital Intelligent Fresh Air System


The hospital environment can also achieve heat recovery and be more energy efficient.


HOLTOP can customize fresh air systems of different forms and different economic standards according to the different characteristics of hospital building use and user needs.

According to the characteristics of different types of buildings and the needs of users, system of different forms and different economical standards can be customized. For example, in a hospital ventilation system, which is usually divided into clean, semi-polluted and contaminated areas, step-by-step air pressure differentials should be established in each area to control the flow of air from the clean area to the contaminated area and prevent the high-risk air from spreading freely.

At the same time, the energy consumption for the fresh air treatment is very huge. Setting up an independent glycol heat recovery system for the fresh air can greatly reduce the fresh air treatment load.


Projects for reference:


Xiaotangshan Hospital

beijing huairou hospital

Beijing Huairou Hospital Emergency Center

shangdong changle hospital

Shandong Changle People’s Hospital Fever Clinic

hongshan gym

Fangcai Hospital of Wuhan Hongshan Stadium

hospital ventilation

Negative Pressure Ward Project of Xinji Second Hospital

hengshui hospital

Nucleic Acid Testing Laboratory of Hengshui Second People’s Hospital


Beijing fist hospital

Peking University First Affiliated Hospital

Shanghai Longhua HospitalShanghai Longhua Hospital
Beijing Aerospace Hospital

Beijing Aerospace Hospital

Beijing Jishuitan HospitalBeijing Jishuitan Hospital
Sichuan West China Hospital

Sichuan West China Hospital

Jinan Military Region General Hospital

Jinan Military Region General Hospital

Hebi First People's Hospital

Hebi First People’s Hospital

Second Artillery General HospitalSecond Artillery General Hospital
Beijing Tiantan Hospital

Beijing Tiantan Hospital

Jinmei Group General Hospital

Jinmei Group General Hospital

China-Japan Friendship Hospital

China-Japan Friendship Hospital

Chinese People's Liberation Army No. 309 Hospital

Chinese People’s Liberation Army No. 309 Hospital

Shanxi University Hospital

Shanxi University Hospital

Zhejiang Lishui Hospital

Zhejiang Lishui Hospital

Post time: 2020-03-30