Effective October 22, 2018

Standard Information
Standard Number:
UL 474
Standard Name:
Standard Edition and Issue Date:
10th Edition Dated June 22, 2015
Date of Previous Revisions to Standard:
9th Edition Revised August 22, 2014
Effective Date of New/Revised Requirements

Effective Date: October 22, 2018

Impact, Overview, Fees and Action Required

Impact Statement: A review of all Listing Reports is necessary to determine which products comply with new/revised requirements and which products will require re-evaluation. NOTE: Effective immediately, this revised standard will be exclusively used for evaluation of new products unless the Applicant requests in writing that current requirements be used along with their understanding that their listings will be withdrawn on Effective Date noted above, unless the product is found to comply with new/revised requirements.

Overview of Changes (Specific details of new/revised requirements are found in table below):

  • Add Refrigerant Loss Test
  • Added Supplement SB

Fees: So that production of products bearing the Listing Mark will not be interrupted, a quote will be issued for the Applicant to work with their local Intertek Lab to determine the necessary test program, sampling requirement and needed construction details and/or updated marking/instruction details.

Client Action Required:

Information – To assist our Engineer with review of your Listing Reports, please submit technical information in response to the new/revised paragraphs noted in the attached or explain why these new/revised requirements do not apply to your product (s).

Current Listings Not Active? – Please immediately identify any current Listing Reports or products that are no longer active and should be removed from our records. We will do this at no charge as long as Intertek is notified in writing prior to the review of your reports.

Description of New/Revised Technical Requirements
51 New clause added;

Refrigerant Loss Test

This new test applies to all types of dehumidifiers. See standard for test details.
Supplement SB New section added;


Added alternative path for evaluating electronic controls. This new requirement applies to appliance with electronic controls not evaluated to relevant standards, such as UL 60730, UL 508, etc.

CUSTOMERS PLEASE NOTE: This Table and column "Verdict" can be used in determining how your current or future production is or will be in compliance with new/revised requirements.

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