Terms of use of Joto-Vent System

Construction specifications: for building jurisdictions in which the minimum bug screen opening size is 1/4 inches (6.35 mm) or less

Combination of [A] Joto-Vent and [B] Ventilation Flashing is all that is required.

Construction specifications: for building jurisdictions in which the minimum bug screen opening size is 1/8 inches (3.2 mm) or less

Combination of [A] Joto-Vent, [B] Ventilation Flashing and [C] VIP Flashing will be required.

NOTICE

  1. If you use the Joto-Vent System together with the conventional method featuring an under-floor ventilating opening, such a use will not be authorized under ER-346. Therefore, please refrain from this kind of combined use.
  2. Even with the Joto-Vent System, there is a need to take a structural measure based on 2012IRC R317 to prevent the corrosion of wooden parts of a house base and wooden building materials.
  3. When using the Joto-Vent System, there is a need to ensure that the foundation is at least 8 inches higher than the ground based on 2012IRC R317(2), to prevent the height of the outside ground from exceeding the installation height of the Joto-Vent.

Joto-Vent System Calculation of Under-Floor Ventilation

The effective ventilation area used for the Joto-Vent System
represents the smallest area with products used in combination.

Joto-Vent:102cm2/m(4.81in2/ft.)
Ventilation Flashing:84cm2/m(3.96in2/ft.)
Ventilation and Insect Prevention Flashing(VIP Flashing):
121cm2/m(5.73in2/ft.)

Examples of member combination for the Joto-Vent System,
and the smallest ventilation area

1:Joto-Vent+Ventilation Flashing
Smallest area 84cm2/m(3.96in2/ft.)

2:Joto-Vent+Ventilation Flashing+VIP Flashing
Structural Safety 84cm2/m(3.96in2/ft.)

Joto-Vent System Structural Safety

The Joto-Vent does not affect base design in any way.
Please design the base compressive load in such a way as to
conform to requirements in NDS-05.

[Joto-Vent’s performance (reference values)]

Compressive load of Joto-Vent:
270kgf/cm2

Compressive load incorporating a safety factor of 2.5:
108kgf/cm2(1533.6psi)

Compressive load for installation area (based on 2 x 4 material)
KP-L102U: 737psi KP-L150U: 660psi

Compressive loads of wood variations (DF, SPF, HF) generally
used for base
DF: 625psi SPF: 425psi HF: 405psi

Components of Joto-Vent System

The Vent {A} is made by molding a composite material (JC) from calcium carbonate and polyolefin resin. KP-L102U is used for 2 x 4 stud walls, and KP-L150U for 2 x 6 stud walls. The same ventilation opening area (102 cm2/m [4.81 in2/ft.]) is used for KP-L102U and KP-L150U. This is the first part of 3 and is indispensable for the Joto-Vent System.


KP-L102U
Product No. KP-L102U
Sill plate 2×4
Color, pattern Black
Dimensions 4"(102)×3'(908)×3/4"(20)
Material JC
Package 20 pieces/box

KP-L150U
Product No. KP-L150U
Sill plate 2×6
Color, pattern Black
Dimensions 6"(150)×3'(908)×3/4"(20)
Material JC
Package 20 pieces/box

CAUTION

  1. Please refrain from storing the product in an extremely high or low temperature, or in an outdoor environment. Otherwise, the product may be deformed.
  2. When using the Joto-Vent System, please refrain from the use of a chemically treated or fireproof wood that contains copper, lead, etc.

Components of Joto-Vent System

The flashing {B} product is made by molding a Galvalume plate conforming to ASTM A792 (JIS G3322). It functions as the cover for the Joto-Vent and the seat for the exterior wall sheathing. The attached double-sided tape is used to fix the lower end of the exterior wall paper wrap. The same ventilation opening area (84 cm2/m [3.96 in2/ft.]) is used for WMF-U35, WMF-U45 and WMF-U55. This is the second part of 3 and is indispensable for the Joto-Vent System.


WMF-U35
Product No. WMF-U35
Length 10'(3030)
Color, pattern White, black
Material Galvalume plate (0.35 mm-thick)
Package 10 pieces/box

WMF-U55
Product No. WMF-U55
Length 10'(3030)
Color, pattern White, black
Material Galvalume plate (0.35 mm-thick)
Package 10 pieces/box

OPTION PARTS(accessories)

External corner   Internal corner   Middle joiner   End cap
     
Product No. WMF-U35SD
WMF-U55SD
Package 5pieces/box
 
Product No. WMF-U35SI
WMF-U55SI
Package 5pieces/box
 
Product No. WMF-U35JC
WMF-U55JC
Package 20pieces/box
 
Product No. WMF-U35EC
WMF-U55EC
Package 5set/box

CAUTION

  1. Please refrain from using the Ventilation Flashing in a coastal area (subject to salt damages) or an area where dense fogs frequently occur.
  2. Please be careful that the paint film of the Ventilation Flashing may peel off due to the dripping of water from a smokestack or exhaust gas generated by automobiles.

Components of Joto-Vent System

The VIP {C} product is made by molding a Galvalume plate conforming to ASTM A792 (JIS G3322). It is used only in areas in which the minimum opening size mentioned in IRC’s Section R408.2 is specified as 1/8 inches (3.2 mm), by being installed together with the Ventilation Flashing. The ventilation opening area is 121 cm2/m (5.73 in2/ft.).


VIP-U0609-L30
Product No. VIP-U0609-L30
Length 10'(3030)
Color, pattern White
Material Galvalume plate
(0.35 mm-thick)
Package 10 pieces/box

CAUTION

  1. Please refrain from using the VIP Flashing in a coastal area (subject to salt damages) or an area where dense fogs frequently occur.
  2. Please be careful that the paint film of the VIP Flashing may peel off due to the dripping of water from a smokestack or exhaust gas generated by automobiles.
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