Effective May 1, 2015

Standard Information
Standard Number:
UL 1812
Standard Name:
Ducted Heat Recovery Ventilators
Standard Edition and Issue Date:
4th Edition Dated May 3, 2013
Date of Revisions:
April 17, 2014, May 3, 2013, and November 1, 2012 (3rd Edition)
Effective Date of New/Revised Requirements

Effective Date (see Schedule below): May 1, 2015

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requests in writing that current requirements be used along with their understanding that their listings will be withdrawn on Effective Date noted above, unless the product is found to comply with new/revised requirements.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:  Several revisions have occurred in the past several years:

  • -Revision April 17, 2014 was Administrative in nature (universal upkeep). 
  • Issuance of 4th Edition May 3, 2013 was Editorial in nature. 
  • Revisions of November 1, 2012 were: 1. Addition of requirements when allowing overload protection not provided with unit, 2. Addition of requirements for electronically protected motors and other editorial revisions, and 3. Revision to update table 10.1 for external thermal and acoustical insulation material Requirements.

Specific details of new/revised requirements are found in table below. NOTE: Although Standards Developing Organization did not identify an Effective Date for these updates, they are technically more stringent and a review of existing listings is necessary. Most likely, SDO had been utilizing these requirements as common practice and standard was ultimately revised.

Schedule:  So that shipping of products with Listing Marks will not be interrupted, an approximate schedule has been established to ensure Listing Reports are found compliant by Effective Date:

  • October 1, 2014 = 8 Month Report Review – Intertek will review all Reports. Update if compliance is verified or issue Findings Letter/Quote for any re-evaluations needed
  • December 1, 2014 = 6 Month Quote Cut-off – Quotes returned for necessary re-evaluations
  • April 1, 2015 = 30 Day Warning – Client advised of all non-compliant Reports to be Suspended
  • May 1, 2015 = Effective Date – ATM Suspended for all non-compliant Reports

Fees:  An initial review of Listing Report (s) will be covered by a direct billing project and will be invoiced at not more than $1000 per report.

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

NOTE: Additions to existing requirements are underlined and deletions are shown lined out below.

10.1 Added Requirement - External Thermal/Acoustical Insulation must be flame rated per Table 10.1
18.2.2,, Added & Revised Requirement – External overload protection allowed if product provided with instructions and functionality. 

Added Requirement - An electronically protected motor shall comply with Standard for Rotating Electrical Machines – General Requirements, UL 1004-1 and the Standard for Electronically Protected Motors, UL 1004-7.

Note – This says that not only does the electronic circuit protecting the motor have to comply with 18.2.9 (compliance with UL 1998, UL 991), but the motor itself must comply with special requirements of UL 1004-7 and UL 1004-1.

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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