Standard 1812, Edition 4
UL 1812

Standard for Ducted Heat Recovery Ventilators

UL CSDS Proposal Edition 4 Published Date: April 21, 2017 Last Revision: April 15, 2024

Summary of Topics b1812_4_20170421_sum.html

Subject 1812

Bulletin Dated: April 21, 2017


The following changes in requirements to the Standard for Ducted Heat Recovery Ventilators, UL 1812, are being proposed:

1. Addition of requirements of electronic circuits

2. Revision to allow the use of clearance and creepage distances from UL 840

3. Addition of requirements to safety critical functions

Back to Standard 1812, Edition 4

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