Kaushal Bharath Raju
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  • Berkeley, CA
  • United States
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  • Chie Kawahara
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Kaushal Bharath Raju's Discussions

Air & Vapor Barrier for a House in Berkeley, California
1 Reply

I am wondering if building experts have an opinion in the correct ordering of vapor and air barrier for a small 1 story house in Berkeley CA. We are planning a DER/Passive house retrofit and are…Continue

Started this discussion. Last reply by Glen Gallo May 3.

On the Question of Airtightness and Energy Performance
28 Replies

It is my understanding that you need an airtight envelope (let's say less than or equal to 0.6 ACH) along with super insulation (whatever R value you need) for best energy performance. However, a…Continue

Started this discussion. Last reply by Brennan Less Jun 20.

Affordability & Deep Energy Upgrade/Passive House Retrofit in Berkeley, California.
85 Replies

We have a small 1940s single level house (1005sqf) in Berkeley, California that is in need of a deep energy upgrade. Our plans include making the envelope air-tight, increase insulation, make use of…Continue

Started this discussion. Last reply by Kaushal Bharath Raju May 22.

 

Kaushal Bharath Raju's Page

Latest Activity

Brennan Less replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"William, maybe I miscommunicated. In my personal experience (largely in the Bay Area PH projects), as well as from my observations from the larger PH community of homes (presentations on the topic by Katrin and W. Feist), the most common kitchen…"
Jun 20
William Reid replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Passive Houses by definition do not need recirculation so "...avoid the recirculating units common in Passive Houses" gives a false impression. Extraction of air from kitchens and bathrooms is a standard feature of Passive House…"
Jun 20
tedkidd replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Kaushal, that is the typical ignorant place we all came from.  Given your account of the conversation, the extent of her expertise may be she bought a hat that says "energy expert" on it.  I doubt she's ever been involve in…"
Jun 19
Dennis Heidner replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Ugh,  hopefully she doesn't advocate the air filtering fiberglass insulation. I suppose her argument is also that any house approved for construction and remodeling in California would need to meet prescriptive codes at about 3ACH50,…"
Jun 19
Kaushal Bharath Raju replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Thanks Brennan for your opinion. To clarify the question was whether or not air tightness matters for energy performance and since we are in Berkeley, CA, does it matter for us. The question how much airtightness is a separate question. As I…"
Jun 19
Tom Delconte replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Henry David Thoreau: "I built my cabin in the woods on Concord Pond. Then I wrapped it with 18th century plastic(bakelite like). I then encased it outside and in with rushes and 18th century extruded polyurethane equivalent thicknesses. The…"
Jun 19
Dennis Heidner replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Thanks, Brennan. That was the point I was trying to make.  And the Berkley building official may have been trying to suggest the same point. "
Jun 19
Brennan Less replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Kaushal, As an LBNL building scientist who studies deep retrofits, I can confidently tell you that (1) airtightness matters, even in Berkeley, and (2) that it is very unlikely to make a home uncomfortable (assuming you provide ventilation and…"
Jun 19
Morgan M Audetat replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"You have to pick one. If you want energy efficiency you have to seal the envelope. Once sealed you have to control the flow of air, in and out of the envelope. What the appropriate air flow should be is highly dependent on the house and its…"
Jun 17
Robert Haverlock replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Well, passive house would disagree, as well as other folks in the Seattle area. As a BPI trained individual, and IAQ consultant, I've have never heard a comment like this, sick house syndrome maybe, but not uncomfortable! What go's out…"
Jun 9
Dennis Heidner replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"The LBNL studies pretty much demonstrate that you have savings by tightening up a building... the size of that savings depends on the climate zone. I suspect you are in climate 4C  (marine) and building to at least the IEC 2012 should be the…"
Jun 5
Kaushal Bharath Raju replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"This is not a LBL scientist but a city of Berkeley official in charge of energy efficiency. She made these comments in an another thread I posted earlier. "
Jun 5
Frank Lee replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Kausthal, You are correct. Perhaps the LBL scientist is working in Livestock Science. Can you report his name? Frank "
Jun 5
Dennis Heidner replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"I think if you read my comments and the articles - there are many caveats that go along with the suggestions.  The original question was if the particular speaker was correct or not, what do other think. and the answer in all of my questions -…"
Jun 5
Dennis Heidner replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Yeah,  and he should also suggest logging the relative humidity in the house...  wrong climate and you've just made your mold problems worse."
Jun 5
tedkidd replied to Kaushal Bharath Raju's discussion On the Question of Airtightness and Energy Performance
"Does the house have hvac?  Then it matters, period.   You are right, it does not.  Slow down and think before leaving harmful advice.  "Eh, maybe it doesnt matter in this climate" is low quality or low integrity…"
Jun 5

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Simple Spaces
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Designer
Professional Interests
Simple Design
Minimalist Architecture
Passive House Standard
Sustainable living practices
Vastu Shastra

Comment Wall (2 comments)

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At 1:16pm on January 23, 2014, Diane Chojnowski said…

Welcome to Home Energy Pros! Feel free to join the conversation in the Forum and Groups. And share your energy efficiency photos, videos and upcoming events. If you're blogging about home performance, this is the place for you!


Thanks!
Diane, HEP Moderator

At 12:20pm on January 17, 2014, Chie Kawahara said…

Hi Kaushal,

We're happy to share our learning on passive house.  By any chance are you a member of Passive House California?  Monthly meetings are usually held in Berkeley on the 4th Sunday of the month and they have a wealth of information.  You're welcome to visit our house in Santa Cruz as well.

Cheers,

Chie

 
 
 

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