Product(s):	Mechanical Designer - PartL
	Version(s):	V8i (Part L 2013)
	Environment:	N/A
	Area:	N/A
	Subarea:	N/A

Problem

When defining HEPA filters as part of the ventilation system, the Notional Building Auxiliary Energy requirements increase substantially.

Solution

Page 20 of the NCM Modelling Guide gives this advice: