Precisionaire MSH Application Guidelines, HEPA Prefilters, Guide Specifications, Component Chart

Application Guidelines

PrecisionCell II filters should be selected for	PrecisionCell II M and MSH
new installations with 24” H x 24” W and 24”
H x 12” W face sizes. These are the most		Component Chart
widely used and stocked sizes. This allows	88655. 04 20 24 MSH D
for 12” increments in height and width of the
filter bank and insures that replacement car-
	Efficiency Series
tridges will be readily available.
			Frame Style
PrecisionCell II filters should be installed with	89655. - 90-95%
			MSH - Metal
	88655. - 80-85%
the pleats vertical wherever possible. It is			w-13/16”
	86655. - 60-65%
permissible to install 24” H x 12” W face size			Single Header
	Nominal Depth
filters with pleats horizontal if necessary to
	04 - 3.75” Deep
meet the size requirements of the filter bank.			Gasket Location
	Nominal Width
HEPA Prefilters			D - Downstream
	20 - (19-3/8”) wide		U - Upstream
PrecisionCell II filters are ideal as prefilters	Nominal Height		V - One Vertical Side
	24 - (23-3/8”) tall
for Alpha Cell HEPA filters. Their light weight

and 4” depth make them an excellent choice

for installation in the optional Prefilter Frame Assembly for the Alpha Cell HEPA Filter Holding Frame or in Surelock Side Access HEPA Housings.

Specify the Surelock housing with an optional 4” wide prefilter track for the PrecisionCell II filters, in lieu of the 2” wide prefilter track for pleated panel filters. We recommend the selection of 80-85% PrecisionCell II filters as HEPA prefilters.

Guide Specifications

1.0 General		2.3 The filter pack shall be enclosed and sealed with-
1.1	Medium and high efficiency extended surface		in a corrosion-resistant metal frame.
	filters shall be PrecisionCell II (M) (MHS) mini-	2.4	PrecisionCell II MSH filters shall have a single
	pleat panel filters as manufactured by Flanders		13/16” diameter header on the air entering side.
	Precisionaire.	3.0 Performance
1.2	Filter sizes, efficiencies and capacities shall be	3.1	Initial and final resistances shall not exceed	the
	as scheduled on the drawings.
			scheduled values.
1.3	Filters shall be UL 900 Class 2 listed.	3.2	Media area must equal or exceed that of the
2.0 Filter Construction			specified filter
		3.3	The average efficiency shall be as determined
2.1	The filter pack shall be constructed of water-laid
			by ASHRAE Standard 52.1 and 52.2	test

microfine fiberglass media containing a water	methods.
repellent binder formed into closely spaced pleats
	3.4 The manufacturer shall guarantee performance
held in position by adhesive bead separators.
	as stated in the literature within tolerances as
	outlined in Section 7.4 of ARI Standard 850.

Flanders PrecisionAire

Foremost in Air Filtration

Toll Free 1-800-637-2803

REPRESENTED BY:

4