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SECTION 10237

CAST ALUMINUM WALL VENTS

***** Sunvent Industries, a division of Sylro Sales Corporation, manufacturers several types of aluminum louvered wall vents for ventilating crawl spaces, ceiling plenums, chimney flues, foundations, pipe spaces, and other conditions. These vents are typically installed in masonry walls and include custom vents and return air vents. Both extruded and cast aluminum vents are provided. Accessories include insect screens, ducts, dampers, and inside registers.

This guide specification section can be used to specify Sunvent Model C, cast aluminum, load bearing, louvered wall vent. Extruded aluminum wall vents without perimeter flanges, Sunvent Model EX, can be specified with SECTION 10235 - EXTRUDED ALUMINUM WALL VENTS. Sunvent Model FL, a flanged extruded aluminum wall vent, can be specified with SECTION 10236 - EXTRUDED ALUMINUM FLANGED WALL VENTS.

The specifier will need to edit this product specification for a specific project to reflect the options and applications being used. The guide section has been written so that most editing can be accomplished by deleting unnecessary requirements. Options are indicated by [ ]. Notes to assist the specifier in selecting options and editing the specification guide are printed in bold and indicated with *****. For final editing, all brackets and notes will need to be deleted from the guide.

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PART 1 - GENERAL

1.1 SUMMARY

***** Edit the following paragraph to reflect project conditions. *****

A. Section includes: Cast aluminum, load bearing wall vents with fixed louvers, [operable damper,] [duct extension,] [duct sleeve,] [inside register,] and insect screens for installation in [masonry] [concrete] [_____] walls to provide ventilation for [crawl spaces] [ceiling plenums] [chimney flues] [foundations] [pipe spaces] [_____].
B. Related sections:

***** List other specification sections dealing with work directly related to this section such as the following. *****

***** Typically Sunvent Model C wall vents are installed in new construction such as clay brick, concrete unit masonry, and concrete walls. *****

1. Section 03300 - Cast-in-Place Concrete: Concrete walls to receive cast aluminum vents.
2. Section 04800 - Masonry Assemblies: [Clay brick] [Concrete unit] masonry walls to receive cast aluminum vents.

1.2 REFERENCES

**** List by number and full title reference standards referred to in remainder of specification section. Delete non-applicable references. *****

A. American Society for Testing and Materials (ASTM) Publications:
1. ASTM A446 - Steel Sheet, Zinc-Coated (Galvanized) by the Hot-Dip Process, Structural (Physical) Quality.
2. ASTM B26 - Aluminum-Alloy Sand Castings.
3. ASTM B85 - Aluminum-Alloy Die Castings.

1.3 SUBMITTALS

A. Provide in accordance with Section 01330 - Submittal Procedures:
1. Product data for wall vents.
2. Shop drawings showing construction, dimensions, and installation details.
3. Sample of finish.

PART 2 - PRODUCTS

2.1 ACCEPTABLE MANUFACTURERS

A. Sunvent Industries, a division of Sylro Sales Corporation, 1 Industrial Drive, No. 26, Pelham, New Hampshire 03076; 800-325-4115; www.sunventindustries.com.
B. Manufacturers of equivalent products submitted and approved in accordance with Section 01630 - Product Substitution Procedures.

2.2 MATERIALS

A. Aluminum castings: [1/4 inch] [6 mm] minimum thickness cast aluminum complying with ASTM B26 or ASTM B85, Alloy No. 319.
B. Galvanized steel sheet: Hot dipped galvanized steel sheet, Grade A, G90 zinc coating, 24 gage minimum thickness complying with ASTM A446.
C. Fasteners: Type, size, and spacing as recommended by vent manufacturer for project conditions.

***** Include the following paragraph if vents are to be installed with sealant. *****

D. Sealant: Type as [specified in Section 07900 - Joint Sealers.] [recommended by vent manufacturer.]

2.3 WALL VENTS

A. Type: Cast aluminum, load bearing, fixed louver wall vent with insect screen, [operable hinged flap type damper,] [duct extension,] [duct sleeve,] [and] [inside register]; Sunvent Model C as manufactured by Sunvent Industries, a division of Sylro Sales Corporation.

***** Sunvent Industries provides vents in stock sizes ranging from 8 by 2-1/4 inches (203 by 57 mm) to 16 by 8 inches (406 by 203 mm). Refer to Sunvent product literaturefor available stock sizes. Depth of cast aluminum vents is 4 inches (102 mm). *****

B. Nominal vent size: [4 inches] [102 mm] deep by [_____] [inches] [mm] wide by [_____] [inches][mm] high.

C. Construction: Framed vent with overlapping louver blades fabricated as cast aluminum unit.
1. Louver blades: Fixed, horizontal blades [1 inch] [25 mm] deep set at 45 degrees at [1 inch] [25 mm] on center.
2. Top frame: Flat surface with toe drip on front edge.
3. Bottom frame: Flat surface with back water stop and front drip edge.
D. Insect screen: 7 by 7 mesh aluminum screen riveted to vent behind louvers.

2.4 ACCESSORIES

***** Sunvent Model FL vents can be equipped with operable, hinged, flap type damper. Include this paragraph if dampers are required. *****

A. Dampers: Equip wall vents with operable, hinged, flap type damper located behind horizontal fixed louver blades and operable from exterior.
1. Hinges: Spring loaded type attached to top of frame.
2. Operator: [1/4 inch] [6 mm] diameter stainless steel socket head cap screw with exterior key operator designed to raise and lower flap damper.

***** Sunvent Model C vents can be equipped with galvanized sheet steel straight rectangular duct extension to accommodate thickness of wall in which vent is installed. Include the following paragraphs if duct extensions are required. *****

B. Duct extension: Equip wall vents with straight, rectangular duct extension to attach to vent and extend through wall.
1. Fabricate from galvanized sheet steel and securely attach to vent with fasteners of type, size, and spacing as recommended by manufacturer.

***** Length of duct extension will vary with thickness of wall and project conditions. Length may be specified in this section or dimensioned on Drawings. To eliminate potential conflicts, length should not be indicated in both locations. *****

2. Size: Width and height to accommodate vent size by [[_____] [inches] [mm]] long.] [length required to penetrate wall.] [length indicated on Drawings and approved shop drawings.]

***** In lieu of sheet aluminum duct extensions, Sunvent Model C vents can be supplied with cast aluminum rectangular duct sleeves that are 3-5/8 inches (92 mm) deep. Duct sleeves are only available in certain sizes. Contact Sunvent Industries for available duct sleeve sizes. Include the following paragraphs if duct sleeves are required. *****

C. Duct sleeves: Provide wall vents with cast aluminum duct sleeves to accommodate connecting wall vent to ductwork.
1. Fabricate from cast aluminum and securely attach to vent with fasteners of type, size, and spacing as recommended by manufacturer.

***** Width and height of duct sleeve shall be compatible with size of vent. Depth of duct sleeve is 3-5/8 inches (92 mm). *****

2. Size: Width and height to accommodate vent size by [3-5/8 inches] [92 mm] deep.

***** Sunvent Model C wall vents can be supplied with inside aluminum register. Registers are not attached directly to vents but are shipped loose for field attachment to duct extension. Include the following paragraph if inside registers are required. *****

D. Inside registers: Provide wall vents with inside register to field attached to duct extensions.
1. Type: Aluminum register with individual adjustable vanes and multi-blade damper.
2. Size: Width and height to accommodate vent size.

2.5 FACTORY FINISH

***** Standard finish for cast aluminum wall vents is aluminum mill finish. As an option, thermoset (baked enamel) finish is available. *****

A. Wall vent [and inside register] finish: [Mill finished aluminum.] [Factory applied thermoset polyester enamel.]

***** Include the following paragraph if thermoset enamel finish is being specified. Refer to product literature for available colors or contact Sunvent Industries regarding custom colors. *****

B. Color: [_____] [As selected by Architect from manufacturer's standard range] [Custom color as designatedby Architect].
C. Insect screen [and] [duct extension] [duct sleeve] finish: Mill finished aluminum.

PART 3 - EXECUTION

3.1 COORDINATION

A. Coordinate supply of vents with construction of walls to ensure proper sizing and placement of vent openings.

***** Typically cast aluminum wall vents are built into wall with mortar as clay brick or other type of masonry is laid. *****

B. Coordinate provision of wall vents with construction of masonry walls. Deliver vents to site in time to allow building into masonry wall to avoid delays.

3.2 INSTALLATION

A. Install vents, [dampers,] [duct extensions,] [duct sleeves,] [and] [inside registers] in accordance with manufacturer's installation instructions and approved shop drawings.
B. Do not installed bent, scratched, or otherwise damaged vents. Remove damaged components from site and replace.
C. Install vents secure, level, plumb, and flush with wall surface.

***** Include the following three paragraphs if vents are to be built into masonry walls. *****

D. Build vents into wall with mortar as part of masonry construction specified in Section [04800 - Masonry Assemblies] [_____].
E. Exercise care that wet mortar is not splashed onto aluminum vent during installation.

***** Include the following paragraphs if vents are to be installed in rough openings after wall is constructed. *****

F. Install vents in wall openings after walls are constructed in accordance with Drawing details and approved shop drawings.
1. Secure vents with clips attached to rear of vent and anchored to perimeter of wall opening.
2. Seal around entire perimeter of vent with sealant and backer rod [as specified in Section 07900 - Joint Sealers].

3.3 CLEANING

A. Exercise care in removing mortar and cementitious materials from aluminum vents in order to avoid scratching. Splashed mortar or cement plaster shall be cleaned from vent with dry burlap wipe. Remove after material becomes hard enough not to smear but prior to set.
B. Remove excess sealant by moderate use of mineral spirits or other solvent acceptable to sealant manufacturer.
C. Wash exposed surfaces with solution of mild detergent applied with soft cloth. Take care to remove dirt from corners. Wipe surfaces clean.

END OF SECTION

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