Perhaps the hole in the door should mirror the shape of the hole at the back of the burn box. I'm thinking skinnier and taller but with a similar cross sectional area. This may help in a more even top to bottom burn.
velacreations Hatfield wrote:why would anyone want to pound 2,000 tires? That's a lot of work, and thank goodness they aren't paying for labor...
We use a modification of Oehler's PSP method. Earthbags could work, too.
I just read the new Earthship Global Model Operation One: Tire Work book and they say the 2 bedroom model uses 750 tires. I think the old models where they used several interlinking horseshoe shapes used much more tires. I agree that an earthship could be made from earthbags however I cannot visualize how to attach the bond beam. I think the Earthship could be made nearly as cheap as a wofati but will require different skills ( I say different because a wofati looks fairly equipment, woodwoorking skill intensive).
Tires: Free or may even get paid to take them
Dirt: Free (thermal mass, walls, floors)
Roof: Maybe less expensive than wofati (doesnt need to support living roof) but does require a metal roofing system which is expensive.
Insulation/Waterproofing/Thermal Mass: Same as wofati
Windows: Same as wofati? Maybe more unless you do some creative sourcing.
Offgrid power: wofati requires a well pump and probably water softening which have large power requirements ( a well pump cant be DC due to the head needed on the pump) while Earthship systems have very low power requirements (they recommend a 2kw solar setup - about 8000$ if you do the install and before any rebates) and run completely DC- AC is only for convenience and the rooftop rainwater catch uses gravity instead of fighting it. Rainwater needs no softening.
Sewage: Water softeners make septic tanks not work well due to the high salt content not to mention engineered wetlands.
Labor: Earthship more but possibly made up for in longevity? Wood underground just seems problematic. A wofati seems to require more digging while an earthship is built on the surface and bermed.
Paul, I'd be interested in your views on Mike Reynolds work (the earthship guy). His buildings address all of the issues you discuss in your podcasts. They collect rainwater for all water usage (no wells, pumps, softening, very little filtration needed), they process their own grey and black water separately, they have at least one self contained greenhouse for the processing of greywater and allow for the addition of another for the black water system, the homes are designed and built from New Mexico, Haiti, Canada without conventional heating or cooling systems (solar gain, thermal mass and convection only), and are designed to be powered completely off grid. His videos may be seen here: Garbage Warrior http://www.youtube.com/playlist?list=PL2F4C0B3123189EC8&feature=mh_lolz Earthship Seminar 1,2 http://www.youtube.com/playlist?list=PL7C8F40E6B3BBDFAE&feature=mh_lolz
1) Getting a mortgage (did you know that it means deathgrip in french?). All my life I was told "Your house is your biggest investment". A 130,000$ house costs 275,000$ if you stay for the 30 years. If you add the taxes in for 30 years you paid 395,000$. Then you have water, power, road improvements etc. Basically buying a house even before the big housing bubble is a Guaranteed Loss Of A Lot Of Money.
2)Putting even 1 penny into the stock market (I put considerably more than 1 penny)
Those wood stoves are sexy. How consistent is the heat? Is it easy to control the temperature? Where is the best place to source them? Is it better to buy a modern one or try for a classic? What should you expect to pay? Can you use them in the summer or would it be better for an outdoor kitchen? They look REAL heavy!
You can't put antifreeze in the water tank. It would be a consumed item, so it would be expensive. You don;t want to be drinking it, cooking with it or washing with it.
I'm talking about running a closed loop collector system with a coil in the tank with would transfer the heat to the water. I think a system like the one below would be just fine. I just dont want to use coolant (or any toxins for that matter) anywhere even near my water supply. I'm one of those wierdos who won't even drink fluoridated tap water
I suppose one could use a pet safe antifreeze. It takes such a small amount of regular antifreeze to kill you ops: There must be a way to design a system so the collector drains when the solar goes off. The trouble would be to keep the pump primed after the collector drains into the house.
saskia wrote: Yeah, just recently, I noticed... Shoo, was learning so much from the Lawton videos! I realized only after they had disappeared they were copyrighted. But frankly, that kind of information should not just be freely available but taught in schools globally!
While I agree they should not be free, whats up with charging 40$ per video for movies with no actors, sets, writers, special effects, CGI etc? Also look what Mike Reynolds (the earthship guy) charges for a set of drawings for a house made out of garbage: 8000$. For drawings. If you want the actual house built that'll be 300,000$. If these guys are serious about wanting to change the world, they need to pay attention to the financial situation of the generation that is going to have to do the actual work of reversing the effects of decades of apathy with the help of their knowledge and experience.
rhymeswithorange wrote: 4)i dont follow your question. there is no pressure tank in this system.
Thanks for the reply! I meant the pressure tank in a well or cistern system which would be the cold water supply in this case. My guess is it wouldn't be an issue because when I feel the cold water supply pipe to my gas water heater, it is cool to the touch right where it goes into the tank (although I can't explain why this would be). Maybe there is some kind of special insulated or isolation fitting for attaching cold water pipes to water heaters. Also 1 more question, is there a way to design this system so that it wouldn't freeze in the winter? I don't like the idea of a pipe filled with coolant going through my water.
I have questions about the picture below. 1)It seems as though the pump is to run constantly during the day(assuming using PV). Is there a chance of overheating/over pressurizing the tank? 2)Would you need some sort of control circuit or t-stat? 3)Do on demand water heaters come on when fed with already hot water? 4)The cold water inlet provides the pressure to this system. Once it is full, would the cold water try to enter the system or would the heat bleed over into your pressure tank?
Anyone have any first hand experience with cooking in an off-grid solar powered home? Obviously it would cost a mint to be able to power an electric oven with solar so what works best for inside the house cooking? Wood, propane? Just plan on cooking outside? I like propane because I like cooking with gas but that is not really off grid. Any input would be greatly appreciated.
H Ludi Tyler wrote: Prairie grasses are very good at making soil, this is where the deep rich soil of the prairies came from - the growth and death of grass roots.
This picture is hard to read but shows prairie plant root systems compared to Kentucky Bluegrass lawn roots; large-growing Tallgrasses like Indian Grass, Switchgrass and Big Bluestem have exceptionally large root systems:
I suppose many of you have seen all of these but I thought it might be nice to have them all in one thread. Presented below in no particular order are my favorites(not including Paul's vids ). Enjoy and please add more!
A Farm for the Future: [youtube]http://www.youtube.com/playlist?list=PL9D086830557D6B73&feature=mh_lolz[/youtube] Secrets Of El Dorado - TERRA PRETA: [youtube]http://www.youtube.com/playlist?list=PLF6B47273AAD1398E&feature=mh_lolz[/youtube]
Garbage Warrior: [youtube]http://www.youtube.com/playlist?list=PL2F4C0B3123189EC8&feature=mh_lolz[/youtube] Geoff Lawton - Intro to Permaculture:
Harvesting Water the Permaculture Way:
Permaculture Soils Geoff Lawton :
The Permaculture Concept: [youtube]http://www.youtube.com/playlist?list=PLA1FE408AA2D7F19F&feature=mh_lolz[/youtube] Toby Hemenway - How Permaculture Can Save Humanity and the Earth, but Not Civilization: [youtube]http://www.youtube.com/watch?v=8nLKHYHmPbo&feature=view_all&list=PL2918520195AB5990&index=0[/youtube] Willie Smits: How we re-grew a rainforest: [youtube]http://www.youtube.com/watch?v=3vfuCPFb8wk[/youtube] Establishing a Food Forest the Permaculture Way:
**The Healing Effects of Holistic High Density Grazing on Land, Livestock & People's Lives** Greg Judy: [youtube]http://www.youtube.com/watch?v=W6HGKSvjk5Q[/youtube] Earthship Seminar 2009 DVD1: [youtube]http://www.youtube.com/watch?v=98baxL1SpcE[/youtube] Earthship Seminar (2009) DVD 2 : [youtube]http://www.youtube.com/watch?v=aIrOupHnScE[/youtube] Permaculture - Sepp Holzer - Aquaculture - Synergy of Land and Water: [youtube]http://www.youtube.com/watch?v=BSaMer9UoUc[/youtube] Farming with Terraces and Raised Beds: [youtube]http://www.youtube.com/watch?v=LkDIJ1iuxn4[/youtube] Farming with Nature - A Case Study of Successful Temperate Permaculture: http://www.youtube.com/watch?v=Xd4X8oigRKk Bullock Brothers Homestead - A 25-Year Permaculture Project: http://www.youtube.com/watch?v=oW7LcNAYBWg System vs Synchronicity - FreemanTV - You Chose To Be Here: http://www.youtube.com/watch?v=IjOxYbSByAM
When I go to Growing Power in Milwaukee(Will Allen's place) they have proudly displayed many giant checks from various government and banking institutions. The checks are physically large like the checks golfers get when they win and they are also large in the dollar amounts(80,000-150,000). A: This makes me wonder how profitable this farm really is and B: Is it permaculture to accept money from these systems?