Joto Vent - Japanese Sill Vent for Crawlspaces - Any Experience or Thoughts?

[Benjamin Wolk-Weiss]

Hey all,

So I just met with a rep yesturday from Joto ( https://usa.joto.com/ ) and they are bringing over this product called Joto-Vent which is a sill vent for crawlspaces that apparently has been used successfully in Japan for about 40 years. It's basically a length of corrugated plastic that replaces your sill sealer as seen in the pictures below. Because it separates the sill from the stem wall, you don't need to use pressure treated lumber for your sill. It also provides about 3.92 in2 of net free ventilation area per linear foot of product. It also comes with a preformed and pre-painted flashing with ventilation holes that meet the bug-screen requirements. This metal flashing provides a really nice looking datum line at the bottom of your siding. 

I wanted to see if anyone else has heard of this product and what do you think of it? I like the idea of getting rid of the through-wall vents (I know these go away with a un-vented crawlspace but humor me for a minute) and creating a shadow-line at the base of the building to add a nice visual interest. I was wondering if these would over-ventilate the crawlspace (if that is even a problem) or if anyone sees other issues with them? Because they run continuous around the sill, you do get great airflow coverage without any dead-zones.

Thoughts?

[Adam Cohen]

YEAH, As Joe Lstiburek says, the best crawl space is either filled in and called a slab or dug out and called a basement!

LOOKS COOL BUT EXPENSIVE!  any idea of cost?

--
You received this message because you are subscribed to the Google Groups "Passive House Northwest" group.
To unsubscribe from this group and stop receiving emails from it, send an email to PassiveHouseN...@googlegroups.com.
For more options, visit https://groups.google.com/d/optout.

--

Adam Cohen
Certified Passivhaus Consultant - North America and Europe

Registered Architect MD, VT, NH & CO, LEED AP, NAHB Green Professional

Design/Builder of the First US Passivhaus Public School Building

2012 VSBN Green Designer of the Year

2013 Green Builder Green Home of the Year

My Upcoming Presentations:

• 4/27 - Sioux Falls, SD
• 5/11 - Burlington, VT
• 5/13 - Toronto, ON
• 5/23 - 5/26 - New York, NY
• 6/13 - New York, NY

I am limiting my travel to 5 days per month.  If you are interested in presentations, please contact me for schedule openings.

EMAIL POLICY

In an effort to increase productivity, I answer email as follows:

Monday - Friday

•  a maximum of 1 hour in the AM (Before 10 AM EST)
•  a maximum of 1 hour in the PM (After 5:30PM EST)

Sign up for our components newsletter here: http://eepurl.com/2MTDn

Commercial Passivhaus information: http://passivscience.com/

Factory Built Passivhaus Component information: www.BuildSMARTna.com
Passivhaus information: http://www.passivehousedesign.us/

More Passivhaus info: http://www.viking-house.us/

High Performance Design: http://quantum-architects.com/

             

 

888.376.3424 (Build Smart office)

540.312.8400 (cell)

[Benjamin Wolk-Weiss]

The rep didn't give us a price list. I am going to try and get one from him. He did say that the cost of the Joto-Vent gets offset a bit since you don't have to use PT lumber (as long as your sill is above the code min), you should already be installing base flashing anyways (so the extra labor to install the flashing part is not much more), and you don't have to purchase and install the standard foundation vents. I'll report back with a price when I get it from him. I'm also going to ask if they have any thermal properties data on it. I wonder what sort of thermal break it provides between the concrete stem wall and the sill plate.

[Hayden Robinson]

Thanks for sharing the info, Benjamin. Looks like a nice option to have available.

 

Hayden Robinson Zertifizierter Passivhausdesigner

hayden robinson architect

206.691.3445