Ventilation is the intentional introduction of ambient air into a space and is mainly used to control indoor air quality by diluting and displacing indoor pollutants; it can also be used for purposes of thermal comfort or dehumidification.
Ventilation is very important for security of tunnel and metro.

The global Tunnel and Metro Ventilation market was valued at xx million US$ in 2018 and will reach xx million US$ by the end of 2025, growing at a CAGR of xx% during 2019-2025.
This report focuses on Tunnel and Metro Ventilation volume and value at global level, regional level and company level. From a global perspective, this report represents overall Tunnel and Metro Ventilation market size by analyzing historical data and future prospect.
Regionally, this report categorizes the production, apparent consumption, export and import of Tunnel and Metro Ventilation in North America, Europe, China, Japan, Southeast Asia and India.
For each manufacturer covered, this report analyzes their Tunnel and Metro Ventilation manufacturing sites, capacity, production, ex-factory price, revenue and market share in global market.

The following manufacturers are covered:
Howden
Epiroc
TLT-Turbo
ABB
Twin City Fan and Blower
Zitron
ABC Ventilation Systems
Cogemacoustic
Systemair
Chicago Blower
Elta Fans

Segment by Regions
North America
Europe
China
Japan
Southeast Asia
India

Segment by Type
Fans & Blowers
Refrigeration & Cooling Systems
Heating

Segment by Application
Road Tunnel
Metro