STANDARD	1 Aug 1998	15861

UPDATES -

SECTION 15861

AIR FILTERS

PART 1 GENERAL

1.1	SUMMARY

A.	Includes But Not Limited To

1.	Furnish and install filters used in mechanical equipment.

B.	Related Sections

1.	Section 15051 - General Mechanical Requirements	15051

PART 2 PRODUCTS

2.1	MANUFACTURED UNITS

A.	Roof Top Unit Filters

1.	2 inch thick, medium efficiency, disposable type pre-formed pleated design, having at least 4.5 sq ft of filtering media per sq ft of face area.

2.	Media shall be reinforced non-woven cotton fabric, treated with adhesive similar to 'Vyclad B' and continuously laminated to supporting steel wire grid conforming to configuration of pleats.

3.	Media pack shall be sealed in a chipboard frame or beverage board.

4.	Filters shall have rated average efficiency of 25 to 30 percent on ASHRAE Test Standard 52-76 and be capable of operating with variable face velocities up to 500 FPM without impairing efficiency.

5.	Initial resistance shall not exceed 0.30 inches w.g. at 500 FPM or 0.14 inch w.g. at 300 FPM. Filter shall be listed Class 2 by UL.

6.	Approved Models And Manufacturers -	Approved Products

a.	DP2-40 by Air Guard

b.	E35H by Eco-Air Products Inc

c.	HC Type 40 by Envopleat

d.	Type 30/30 by Farr Co

e.	Mark 80 by Serv-Aire

B.	Side Access Housing Filters

1.	Prefilters shall be 2" medium efficiency, pleated, disposable type. Each filter shall consist of a non-woven cotton fabric media, media support grid, and enclosing frame. Prefilters shall be capable of being installed or removed without disturbing the seal on the final filter.

2.	Final filters shall be 12" deep, high performance, deep pleated, totally rigid and totally disposable type. Each filter shall consist of high density media, media support grid, contour stabilizers, diagonal support bracing, and enclosing frame.

3.	Filter media shall be of high density microfine glass fibers, laminated to a reinforcing backing to form a lofted filter blanket. The filter media shall have an average efficiency of 90%-95% on ASHRAE Test Standard (52.1-92). It shall have an average arrestance of not less than 99% on that standard. Filters shall be listed by Underwriters' Laboratories as Class (2)(1).

4.	The media support shall be a welded wire grid with an effective open area of not less than 96%. The welded wire grid shall be bonded to the filter media to eliminate the possibility of media oscillation and media pullaway. The media support grid shall be formed in such a manner that it effects a tapered radial pleat design. The grid shall be designed to support the media both vertically and horizontally.

5.	Contour stabilizers shall be galvanized steel and shall be permanently installed on both the air entering and air existing sides of the filter media pack. There shall be four contour stabilizers on the air entering side and six on the air exiting side. The filter shall be capable of withstanding 10" w.g. pressure drop without noticeable distortion of the media pack.

PART 3 EXECUTION

3.1	INSTALLATION	Installation

A.	Provide ample access for filter removal.

Delete Paragraph 'B' if no downflow furnaces used.

3.2	FIELD QUALITY CONTROL

On addition / remodel Projects, specify if new filters will be required in existing ductwork and equipment.

A.	Inspection - At date of Substantial Completion, air filters shall be new, clean, and approved by Owner's representative.

END OF SECTION