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Galvanized J vent cap with a flat base and rounded top for secure duct attachment.

Galvanized J vent cap with a flat base and rounded top for secure duct attachment.

J Vent - Galvanized-1365

J Vent - Galvanized-1529

Top view of a galvanized J vent cover with a flat base and curved hood.

Underside of a galvanized HVAC vent cap featuring a round duct connection.

J Vent – Galvanized

Rated 5.00 out of 5 based on 3 customer ratings

(3 customer reviews)

$29.95 – $299.95

Quality constructed from heavy-duty 28-26 gauge galvanized steel, depending on size
Great for attic (static) ventilation and can be used with most roofing materials
Provides a low silhouette and is open on two sides for better air flow
Helps eliminate attic moisture and heat build-up
Works best when used with soffit or gable end venting
Comes with a built in ⅛ inch screen
Available in opening sizes ranging from 3 – 20 inch diameters

Size

3 inch
4 inch
5 inch
6 inch
7 inch
8 inch
9 Inch
10 inch
12 Inch
14 Inch
16 Inch
18 Inch
20 inch

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SKU JV Categories Attic Ventilation, Roof Vents, Static Vents

Description

The FAMCO JV J Vent rooftop ventilator is great for attic (static) ventilation and can be used with most roofing materials. It provides a low silhouette and is open on two sides for better air flow. It helps eliminate attic moisture and heat build-up. This roof vent works best when used with soffit or gable end venting. Comes with a built in ⅛ inch screen. Quality constructed from heavy-duty 28-26 gauge galvanized steel, depending on size. The FAMCO JV J Vent rooftop ventilator come in opening sizes ranging from 3 - 20 inch diameter. The FAMCO JV J Vent rooftop ventilator is manufactured by FAMCO in the United States and comes with a 1-year warranty against product defects and workmanship. If you have any questions about this product, please refer to the FAQs above or feel free to contact us.

PDF Download

Download the JV product PDF.

Spec Sheet

J Vent - Galvanized

SKU: JV

Click to Enlarge

Questions and answers of the customers

Can this be used with a 14 inch diameter single wall duct pipe for exhaust?

Q Can this be used with a 14 inch diameter single wall duct pipe for exhaust? answer now
Asked on April 7, 2022 7:00 pm

A
The J-Vent is not intended for exhaust use, it is designed for attic ventilation. For a list of our roof exhaust vents, please see our product categories under Products > Roof Vents > Piped Exhaust Vent.

Do you have a vent this style that the base is 8x8? It's for a metal roof.

Q Do you have a vent this style that the base is 8x8? It's for a metal roof. answer now
Asked on March 7, 2022 12:35 pm

A
The smallest base size we offer for the J-vent is a 9"X9" flange, which would be for either the 3" or 4" diameter size.

The JV-12 has a free area of 113.09 does this mean for a 1000sqft flat roof I need 9 (8.84) vents. 1000sqft / 113.09 = 8.84. That seems like a lot of vents for vents that are that size.

Q The JV-12 has a free area of 113.09 does this mean for a 1000sqft flat roof I need 9 (8.84) vents...... Read more answer now
Asked on February 9, 2021 5:12 pm

A
The U.S. Department of Housing and Urban Development Statutes typically require one sq. foot of net free vent area per 150 square feet of attic area to be vented (1/150 rule). We do have an attic ventilation calculator on our website under the "Resources Tab". According to that calculation tool, you would need 960 sq. inches of net free vent area. You are correct in that you would need 9 of the JV12 vents to reach this amount of net free vent area.

3 reviews for J Vent – Galvanized

5.0

Based on 3 reviews

5 star	100	100%
4 star		0%
3 star		0%
2 star		0%
1 star		0%

Rated 5 out of 5

galvanized J vent – February 13, 2018

Great product

If you are looking for a small vent for any type roof, this is the one to get, excellently made, very sturdy and great looking. I purchased 2 for a storage unit and will be getting more for my garage.
Rated 5 out of 5

Lee McClung – May 9, 2018

Just what I needed

Looking to increases roof vent and this was perfect. Heavy duty and quality. Happy with purchase.
Rated 5 out of 5

Jim Wise (verified owner) – September 6, 2024

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OUR PRODUCT GUARANTEE

FAMCO prides itself on Quality Built Products manufactured from quality raw materials. All products are guaranteed to be free of defective material or workmanship for a period of one year from the date of delivery. During the guarantee period, if any parts prove defective, they will be replaced free of charge. Please click here to review a complete version of our limited warranty.

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