Under Behind the Intent Beta Update, revise the second paragraph: delete the words "Annex A.1" and "evaluating", and add a new sentence at the end of the paragraph: Background noise levels can still be calculated or measured using the ASHRAE and AHRI references.

Under Step-by-Step Guidance, after the first sentence add the following: "Note that for step 4, it is still acceptable to verify background noise via calculations from the ASHRAE Handbook or AHRI standard, or measurements via ANSI Part 1 annex A1 or ASHRAE Handbook, or other equivalent method."