Comments (105)
Thank you for reporting this comment. Undo
PRO
Bill Fry Construction - Wm. H. Fry Const. Co.

Here's a photo while were doing an air-sealing test to achieve at most .6 air changes per hour. Normally this is done at an exterior door, however we hadn't installed the door yet, so we made our own opening. Note that because the door blower door test equipment sits inside a door opening, the leakiness of that door assembly is not tested. A workaround is to put the equipment in a different exterior door opening on a subsequent test. This home is a new custom home in Los Altos, California, USA.

1 Like    
Thank you for reporting this comment. Undo
PRO
River Architects

Nice work Bill! In our own certified passive design studio we had an air tightness result of .18 ACH50, for a retrofit. Builders are getting better and better at hitting tight numbers, and the work is becoming demystified. Our latest project just hit .2 ACH50 in the preliminary test, so our studio wasn't just a fluke!

1 Like    
Thank you for reporting this comment. Undo
PRO
Bill Fry Construction - Wm. H. Fry Const. Co.

Awesome! We don't have our final numbers yet, but we expect to hit at least the required .6. Realistically, in the San Francisco Bay Area, you can live in a tent - so the numbers aren't as critical as more challenging climates. The homeowner will still have the benefit of having a home that is 10x more energy-efficient than the neighbors and enjoy superior indoor air quality. We've had several challenges that are inherent to the design - so far, we're trying to avoid motorized duct dampers and we have three major holes that are designed in: the hood, the dryer, and a bathroom fan. The dryer cannot be a ventless heatpump-type because there is a desire to get clothing crispy dry and for the dryer to be within the envelope. With all of the insulation, the house is super quiet and sounds much sturdier than a conventional home.

3 Likes    
Related Stories
Architecture Off the Grid: Siting and Building to Conserve Energy
Look to low-tech solutions for big energy savings when you’re constructing a home
Full Story
Home Tech Off the Grid: Ready to Pull the Plug on City Power?
What to consider if you want to stop relying on public utilities — or just have a more energy-efficient home
Full Story
Shop Houzz Bar Stool Trends for 2019
By Houzz
Shop styles that are sure to make an impact on your design
See Products
Materials Insulation Basics: Heat, R-Value and the Building Envelope
Learn how heat moves through a home and the materials that can stop it, to make sure your insulation is as effective as you think
Full Story
Architecture Sunlight Used Right: Modern Home Designs That Harness Solar Power
Embracing passive heating principles through their architecture, siting and more, these homes save energy without skimping on warmth
Full Story
Shop Houzz Up to 75% Off Most-Loved Rugs
By Houzz
Save big on some of our most popular rugs
See Products
Architecture 15 Smart Design Choices for Cold Climates
Keep your home safe and comfortable in winter by choosing the right home features and systems
Full Story
Earth Day What's LEED All About, Anyway?
If you're looking for a sustainable, energy-efficient home, look into LEED certification. Learn about the program and its rating system here
Full Story
Architecture How Thermal Mass Keeps You Warm and Cool
Passive solar design makes use of this element. Here’s how it works and how you can get it in your home
Full Story
Healthy Home Get Cleaner Indoor Air Without Opening a Window
Mechanical ventilation can actually be better for your home than the natural kind. Find out the whys and hows here
Full Story