Cup of Joe - Betsy Pettit and Joe Lstiburek on How to Get to Net-Zero

Cup of Joe
Betsy Pettit and Joe Lstiburek on How to Get to Net-Zero
Net-zero refers to energy consumed (-) and renewable energy produced (+). The goal is a net of zero.
Did you know that you can get 70% of the way there with great levels of airtightness and enough thermal value? If you knew that, than you probably also know you need great details for all the places that water is likely to get past your building enclosure. Watch as Ms. Pettit explains how she and Building Science Corporation has provided details for the NIST House. You can see the NIST house and other details at buildingscience.com
Be on the lookout for how we calculate that:
1
+ 5
+ 10
+ 20
+ 40
+ 60
-----------------------
= 0
-----------------------
For more information on the NET-ZERO ENERGY RESIDENTIAL TEST FACILITY (NZERTF), see below!
www.nist.gov/el/net-zero-ener...
If you want to learn more, please consider coming to one of our seminars!
www.buildingscience.com/upcom...

[@ramblinjamman]

What a pleasure to see and hear Betsy in action! It's so refreshing that powerhouse women of her caliber are involved in the building industry, but more specifically in the world of Building Science. Lord knows we need them. Keep em' comin', Ms. Pettit! :D

[@GreenIllness]

This is how Joe initiates Betsy to action every time I think.

[@federiconussbaum2242]

Joe rocks... Always... Follow joe!!!

[@richardlangley90]

It would be really helpful if the NIST specific website, that Betsy recommended near the end of the interview, could be added in the general info section

[@buildingsciencecorporation8434]

Agreed! And, done. Thank you!

[@richardlangley90]

@@buildingsciencecorporation8434 Thanks. It is interesting to note that the published research only goes to 2016...the page for the zero energy home was last updated in 2018. Surprising that with all that work and expense (checked out the mechanical drawings...wow) that research would stop after only two years in operation....seems like an awful waste.

[@buildingsciencecorporation8434]

@@richardlangley90 Betsy also wrote about it on our site. Her report is here: www.buildingscience.com/documents/reports/rr-1401-design-challenges-nist-net-zero-energy-residential-test-facility/view

[@GardylooAlaska]

Interesting video, I question the one solution fits all in regards to air barriers, vapor barriers and "WRB". There are many climate zones in the US, high humidity locations would utilize a different strategy than a desert climate, even if the temperature ranges are similar. Homes that are built in areas that have continuous below freezing outside temperatures will suffer without some type of a vapor barrier (VB) on the insides and ideally some negative pressure air management via a HRV. Without a "tight" VB on the inside, moisture will migrate into the wall and insulation cavity, condense and freeze, it will NEVER dry to the inside. Homes that are built with some type of rigid insulation (remote wall) on the exterior of the home essentially creates a VB, potentially in the wrong location with the wall envelope and can trap moisture. In remote wall construction the rule of thumb is 1/3 and 2/3 rds. Meaning 1/3 of your insulation on the inside and 2/3 on the exterior. And plane your air management layer at the 1/3-2/3 location, and NO VB under the drywall. What this means is your dew point is outside the membrane and the interior wall will remain warm enough to not condense moisture. A typical remote wall home here in Fairbanks Alaska would be framed with 2 X 4, sheathed then a membrane and then 6" of EPS insulation. This works, higher insulation on the inside means you need more insulation on the outside. It gets cold and stays cold in Fairbanks AK, as it does in Duluth Minnesota, places in Montana, North Dakota and Idaho. A wall that does not dry out, will rot out...

[@coolmusicfoundhere]

The volume is REALLY low on this series. Can it be increased for the next show please?

[@jimginter6802]

'your off by an order of magnitude' that's what marriage is about, very good.

[@Macwill1985]

Hard to hear joe