EXHAUST AND INTAKE ROOF VENT
***** Active Ventilation Products, Inc. manufacturers passive and powered exhaust ventilators, tube skylights, and combination skylight and ventilator units.
This guide can be used to prepare a specification for Pop Vent, a roof mounted, passive exhaust ventilator or fresh air intake vent.
The specification section is organized by placing information in three standard parts:
PART 1 - GENERAL Describes administrative and procedural requirements.
PART 2 - PRODUCTS Describes materials, products, and accessories to be incorporated into the construction project.
PART 3 - EXECUTION Describes how the products will be installed at the construction site.
Throughout this product guide specification, references are made to other specification sections that might be contained in the project manual. These references are presented as examples and coordination reminders. For each project, these references will need to be revised to reflect actual sections being used.
Within the specification text, Imperial dimensions are presented first in brackets followed by System International Metric (SI) equivalents also in brackets. Depending on project requirements, either the Imperial or the SI metric equivalents will need to be deleted.
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 and options. 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.
PART 1 - GENERAL
***** Pop Vent can be used as a passive exhaust ventilator or as an intake air vent. It has no moving parts. *****
A. Section includes: Roof mounted, passive exhaust ventilator and intake air vent with no moving parts including [roof mounting flanges] [extension collars] [roof adapters] [dampers].
***** Pop Vent can be installed on asphalt shingle, clay and concrete tile, metal panel, and built-up and single ply membrane roofs. Select appropriate paragraph from the following to reflect project conditions. *****
B. Section 07310 - Shingles: Asphalt shingle roofing to receive vent.
C. Section 07320 - Roof Tiles: [Clay] [Concrete] tile roof system to receive vent.
D. Section 07410 - Metal Roof Panels: Metal roof system to receive vent.
E. Section 07500 - Membrane Roofing: [Built-up] [Single ply] membrane roofing to receive vent.
1.2 PERFORMANCE REQUIREMENTS
A. Vent shall have been tested to:
1. Withstand [110 miles per hour] [177 kilometers per hour] wind without damage.
A. Provide in accordance with Section 01330 - Submittal Procedures:
1. Product data for exhaust and intake vent including [roof mounting flanges] [collar extensions] [roof adapters] [dampers]. Include data showing compliance with Paragraph 1.2.
2. Shop drawings: Indicate dimensions, construction, and installation details.
3. Manufacturer's installation and maintenance instructions.
4. Copy of warranty required by Paragraph 1.4 for review by Architect.
A. Provide under provisions of Section 01780 - Closeout Submittals: Lifetime warranty to initial owner to cover defects in vent materials and workmanship.
PART 2 - PRODUCTS
2.1 ACCEPTABLE MANUFACTURERS
A. Active Ventilation Products, Inc.
P.O. Box 1521
Newburgh, New York 12551-1521
2. Telephone: 800-247-3463 or 845-565-7770
3. FAX: 845-562-8963
4. Website: www.roofvents.com
5. E-mail: firstname.lastname@example.org
B. Requests to use equivalent products of other manufacturers shall be submitted in accordance with Section 01630 - Product Substitution Procedures.
2.2 EXHAUST AND INTAKE ROOF VENTS
***** Various models of Pop Vent are manufactured by Active Ventilation Products, Inc. ranging in size from 4 to 24 inches (102 to 610 mm) inside diameter. Model number refers to diameter of vent. For example, No. PV-10 has 10 inches (254 mm) diameter. *****
A. Type: Roof mounted, circular, passive vent with no moving parts to be used for either fresh air intake or building exhaust; Pop Vent Model No. [PV-4] [PV-6] [PV-8] [PV-10] [PV-12] [PV-14] [PV-16] [PV-18] [PV-24] as manufactured by Active Ventilation Products, Inc.
B. Material: Heavy gauge aluminum
***** Pop Vent is provided as mill finished aluminum or with powder paint coating. *****
C. Finish of exposed to view surfaces: [Electrostatically applied powder paint coating. Color selected from manufacturer's standard range.] [Mill finished aluminum.]
D. Construction: Circular lid with solid flat top and sloped side. Lower portion contains band of slotted vertical vanes. Lid covers inner cylinder with slotted vanes and connecting to roof mounting flange. Area between inside and outside cylinders is open on bottom. Ventilators with moving parts or electrical operation are not acceptable.
***** Pop Vent is wind driven without any moving parts. It is noiseless and maintenance free. It does not require electricity. *****
E. Operation: Ventilator is wind driven, noiseless, and maintenance free. Outside air moving against vanes of lid is directed to create circular air flow inside ventilator. Vanes of inner cylinder face in same direction as air movement created by outside cylinder. Air movement creates venturi effect which produces negative pressure and pulls air from within [building] [attic] [_____] expelling heat and moisture. When used as air intake vent, a fan or mechanical system within building pulls air into building through vent.
***** Refer to Active Ventilation Products literature for vent dimensions, free vent area, and other attributes. Edit the following paragraphs to reflect selected model. *****
1. Inside diameter: [_____] [inches] [mm].
2. Outside diameter: [_____] [inches] [mm].
3. Height without extension collar: [_____] [inches] [mm].
G. Net free vent area: [_____] [square inches] [square mm].
***** Pop Vent can be mounted directly on roof or one or more collar extensions can be added to provide a ventilator stack ranging in height from 1 to 18 inches (25 to 457 mm). Include the following paragraph if collar extensions are required. *****
H. Collar extensions: Equip ventilator with extension collars to provide [_____] [inches] [mm] high stack.
***** Various roof mounting flanges are provided to accommodate type of roofing system. Flanges are either square or round. Refer to Active Ventilation product literature for flange shape and size for specific models. Edit the following paragraph to reflect project requirements. *****
I. Roof mounting flange: [_____] [inches] [mm] [square] [diameter] flange fabricated from [[0.025 inch] [0.6 mm] aluminum and designed to accommodate [shingle] [membrane] roofing.] [dead soft aluminum and capable of being formed to [clay] [concrete] roof tiles.]
***** Pop Vent can be installed on built-up, single ply, shingle, tile, and metal roofs as well as on existing roof curbs, vents, and chimneys. Both flat and pitched roofs are suitable substrates although adapters may be required for steep pitches and some roof profiles. Contact Active Ventilation Products, Inc. for special mounting conditions. Edit the following paragraph for project conditions. *****
J. Roof adapters: Provide aluminum adaptor to accommodate [[_____] degrees roof pitch] [[_____] roof profile].
***** Either manual or automatic dampers can be provided for Pop Vents. *****
K. Dampers: Equip ventilator with [manual damper] [thermostatically controlled automatic damper] to open and close air inlet/outlet.
L. Sealants: Type as recommended by manufacturer for application and type of roof substrate.
M. Fasteners: Corrosion resistant screws, nails, staples or other fasteners of type, size, and spacing as recommended by manufacturer for application and type of roof substrate.
PART 3 - EXECUTION
A. Coordinate provision of exhaust and intake vents with roof system specified in Section [_____] - [_____] to ensure compatibility of substrate to receive vents.
B. Examine site conditions and verify that structural supports and openings are properly sized, prepared, and ready to receive vents.
A. Install in accordance with manufacturer's instructions and approved shop drawings. Coordinate with installation of roofing system, curbs, and flashings to ensure weathertightness.
***** When used as an exhaust vent, Pop Vents are typically located high on rear roof slope, below rigid line. When used as an intake vent, Pop Vents are typically located low on rear roof slope. Single units are centered and multiple units are equally spaced. *****
B. Locate vents as indicated on Drawings. Ensure openings do not conflict with roof framing members. Accurately cut opening in roof substrate using template and pilot hole.
***** Depending on type of roof system; nailers, rigid insulation, or rigid roof board may be required. *****
C. Install [preservative treated wood nailers] [rigid board roof insulation] [rigid roof board] as detailed on Drawings and approved shop drawings.
D. Apply bituminous paint on aluminum surfaces in contact with dissimilar metals.
***** Include the following paragraph if Pop Vent is installed on asphalt shingle roof. *****
E. Roof mounting flange installation on shingle roof:
1. At location of opening, ensure roofing nails are removed. Roll back up-slope shingles.
2. Apply sealant to bottom of roof mounting flange and between roof shingles to receive vent. Slide roof flange under up-slope shingles such that shingles cover one half of flange.
3. Anchor roof mounting flange securely to roof structure with 4 minimum fasteners per side. Provide temporary cap over flange opening.
4. Install sealants to fasteners and shingle edges to achieve weathertightness.
***** Include the following paragraph if Pop Vent is installed on clay or concrete tile roof. *****
F. Roof mounting flange installation on [clay] [concrete] tile roof:
1. Prior to installation of roof tile, install lower flanged curb flashing to roof substrate over opening with appropriate fasteners.
2. Install sealants to fasteners and flashing edges to achieve weathertightness.
3. After roof tile is installed to level of vent and covers down-slope side of lower flashing, push vent mounting flange onto lower flashing.
4. Anchor up-slope side of dead soft aluminum roof mounting flange to roof substrate.
5. Install remaining tiles over up-slope portion of vent mounting flange. Form bottom portion of dead soft aluminum flange to profile of roof tiles.
6. Provide temporary cap over roof mounting flange opening.
***** Include the following paragraph if Pop Vent is installed on metal panel roof system. *****
G. Roof mounting flange installation on metal panel roof:
1. Ensure openings are centered between ribs of metal roof panel and there is sufficient flat surface to accommodate roof mounting flange.
2. Apply butyl tape sealant to bottom of roof mounting flange around complete perimeter. Use nylon spacers between roof panel and flange to eliminate sealant migration due to compression.
3. Fasten roof mounting flange with self-tapping hex head coated fasteners with metal washer and neoprene sealing washer of size and spacing as recommended by manufacturer.
4. Provide temporary cap over roof mounting flange opening.
***** Include the following paragraph if Pop Vent is installed as part of built-up membrane roofing system. *****
H. Roof mounting flange installation on built-up membrane roofing system:
1. Install roof mounting flange as part of built-up roof membrane. Provide temporary cap for flange opening.
2. Set mounting flange in plastic roofing cement.
3. Securely anchor flange to roof substrate with fasteners of type, size, and spacing recommended by manufacturer.
4. Install flexible base flashing over roof mounting flange as part of roofing operation.
***** Include the following paragraph if Pop Vent is installed as part of single ply membrane roofing system. *****
I. Roof mounting flange installation on single ply membrane roofing system:
1. Install roof mounting flange as part of single ply membrane roofing. Provide temporary cap for flange opening.
2. Trim corners of mounting flange to provide smooth radius without sharp points.
3. Apply butyl tape sealant or roofing mastic to bottom of roof mounting flange. Set mounting flange over roof opening onto single ply roof membrane.
4. Securely anchor flange to roof substrate with fasteners of type, size, and spacing recommended by manufacturer.
5. Install piece of single ply roofing over mounting flange. Secure with adhesive, heat welding, or other procedure as part of roofing operation.
J. After roof system installation is complete, remove temporary cap and install ventilator collar onto mounting flange. Attach with fasteners and apply sealant to collar and flange joint.
***** Include the following paragraph if automatic dampers are required. *****
K. Test dampers and adjust for proper operation.
END OF SECTION