Unverified50% confidenceTradeoffExact time

Using jet fans alone in ultra-long tunnels causes pollutant concentrations to rise linearly along the length, so they need to be combined with ventilation shafts.

1

Sources

50%

Confidence

Long-term

Relevance

10/12/2026

First Seen

Sources

What Are the Engineering Highlights of America's Longest Highway Tunnel?

Related Entities

射流风机product 通风竖井concept

Related Claims

UnverifiedJet fans are usually hung in groups on the tunnel crown or side walls, inducing the surrounding air into overall flow through high-speed jet airflow.74% similar

Cite This Claim

Stable URI

https://kongchang.com/claim/1011918

API

curl https://kongchang.com/api/v1/knowledge/claims/1011918

MCP

get_claim(id=1011918)