01-02-09, 10:05 PM | #1 | |
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Shelter/ Passive Houses
Quote:
Interesting stuff. |
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01-03-09, 02:59 PM | #2 |
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Nice post and good info. It sounds like this should have been common sense a long time ago. I guess low fuel prices really had people satisfied though. I know I look forward to blowing the insulation into my attic and having a much more comfortable house and lower heating bill soon!
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01-03-09, 11:12 PM | #3 |
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That is awesome. I wish my house was made that way. I don't know about the US, but why is it here in Canada, whenever they make newer homes that are suppose to be "better" they are still cutting corners and doing the minimum they need to do instead of building really well made homes like in the article. It's like if you want anything good, you have to learn about it and do it yourself.
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01-04-09, 06:33 AM | #4 |
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Have seen such a house once on TV. Their only heating system is human heat
The problem is when it is too cold outside, they have to invite people to heat the house. This reminds me a French commercial (for natural gas company) : Code:
Never did something better since human heat.
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01-04-09, 12:31 PM | #5 |
Lurking Renovator
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I'm having a hard time finding out what "stuffiness" really is in qualitative and preferably quantified terms. What exactly leads to that feeling and how much of whatever can the air have before we notice?
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01-09-09, 08:13 AM | #6 |
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Looks like the US is getting on board with this as well. I just got this link from larryrose. Thanks Larry.
Super-efficient. Cost effective. Carbon-neutrality within reach. Today.
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01-09-09, 04:26 PM | #7 |
The Gardener
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So, are there things we can do to our homes to make them more like this? Or does the house have to be built from the ground up to use all the techniques?
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01-09-09, 06:14 PM | #8 | |
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Quote:
I'm still working on improving my own home, but I doubt I can make it as efficient as a "Passive House". Here is the website of a German architect located in New Mexico who is designing Passive Houses Zero Energy, Carbon Neutral: The Passive House Standard Tim
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01-11-09, 08:55 AM | #9 |
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I'm sure you could convert a conventional house to a passive house, but it would include basically tearing off every outer wall in the place to add more insulation. Say an average 2x4 wall is filled with fiberglass. That is R-11 per ColoradoENERGY.org - R-Value Table. Not even remotely close to what it should be with a passive house (R40+). Even with 2x6 construction it doesn't get that much better as it would only be about R16.5. You'd literally need to thicken your walls, or use a better R-value insulating material. Fiberglass is about R3.5 per inch. Polyurethane which is what I believe is the blown in foam is R6.5 per inch (and seals the house air tight). Even using that good stuff, you'd need 2x6 construction and fill it completely full to get close to R40.
What they did on my house which is old real 2x4 construction is add a layer of polystyrene to the outside of the wall between it and the house wrap and siding. I'm not sure how thick it is unfortunately, but thats another R2 to R5. If I ripped out the lathe and plaster and redid the walls ever, I'd think about throwing up 1 to 2 inches of polyiso insulation on the outside wall before putting up drywall. This would add another R7.2 to R14.5 to the wall and cover up some of the woods thermal bridging, but it would also make the room a bit smaller. In my case, I'd be willing to do that. If I did all that, my walls would still fall quite short of R40 unfortunately. It would probably put me somewhere around R26-33, but a heck of a lot better than my current ~R16.
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01-28-09, 12:29 PM | #10 |
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I just can't get this build idea out of my head lately. Darin and I looked up some more info on these houses and their energy efficiency is simply amazing. Here are some quotes he dug up on a 1400ish square foot house in Illinois. Heat and water heat are all electric. Amazing results.
"For most of the year, the house requires no supplemental heat at all. The 1,000-watt (3,141 Btu/h) electric heating element is integrated with the HRV. Last January, her electric bill (for all household uses, including heat) totaled only $35 (340 kWh)... the month included two cloudy weeks and temperatures as low as -10°F." "Annual electricity consumption for heating was 1,065 kWh for the twelve month period between February 2005 and February 2006."
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