Specification History

SWS Version Created Specification ID Title Specification Objective Supporting Materials Rationale Status
Version 2025 24/09/2023 - 17:13 6.0201.1a Fan selection

Select a fan that:

rated as no more than 2.0 sones at maximum speed

has an efficacy of 4 cfm/watt or more

moves at least 50 cfm after installation, ducting, and termination is complete

Select efficient and quiet equipment

Concur with suggested change, but suggest changing the word “produces” to “rated at”. Sones can’t be measure in the field so it is the laboratory rating that is of concern. Red Line
Version 2020 14/08/2020 - 14:27 6.0201.1a Fan selection

Select a fan that:

produces no more than 2.0 sones at maximum speed

has an efficacy of 4 cfm/watt or more

moves at least 50 cfm after installation, ducting, and termination is complete

Select efficient and quiet equipment

Black Line
Version 2020 14/08/2020 - 14:27 6.0201.1a Fan selection

Select a fan that:

produces no more than 2.0 sones at maximum speed

has an efficacy of 4 cfm/watt or more

moves at least 50 cfm after installation, ducting, and termination is complete

Select efficient and quiet equipment

Black Line