RICE NESHAP is an acronym for the latest EPA regulations affecting stationary gas and diesel engines. Learn more here.

Is a “critical grade” silencer’s performance standard across various manufacturers?

No, exhaust silencer attenuation grades (critical, residential, etc) are not regulated by any industry standard. This means that a given manufacturer’s “critical grade” silencer may perform differently from an equally-labeled product from a competing manufacturer. Whenever possible, it is best to specify sound attenuation requirements in terms than can be measured (i.e. silencer shall provide 25dBA overall noise … Read more