USA Banner

Official US Government Icon

Official websites use .gov
A .gov website belongs to an official government organization in the United States.

Secure Site Icon

Secure .gov websites use HTTPS
A lock ( ) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.

U.S. Department of Transportation U.S. Department of Transportation Icon United States Department of Transportation United States Department of Transportation

Is a heat shield mandatory on a vertical exhaust stack?

Document

Section § 393.83: Exhaust systems.

Guidance Q&A

Question 1: Is a heat shield mandatory on a vertical exhaust stack?

Guidance: No. However, § 393.83 requires the placement of the exhaust system in such a manner as to prevent the burning, charring, or damaging of the electrical wiring, the fuel supply, or any combustible part of the CMV.

Regulatory Topic: Heat shield on vertical exhaust stack?
Effective Date: Sunday, May 4, 1997
Issued Date: Friday, April 4, 1997