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En quête d'un habitat durable #2 – Le chauffage – Low Tech Lab

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This is it ! We are in our field lab, there still are some adjustments but we're close to the end In this episode, we're focusing on heat

Heating is almost 80% domestic energy use In order to tackle heat, we decided to use a particular approach, developed by the Négawatt collective First and foremost, we need to adress sobriety Sobriety regarding heating is simply heating less The ADEME advises to lower a little our domestic thermostats, instead of 20°C, it should be 19°C in living rooms and 16°C in bedrooms

Here goes twigs and all, everything combustible The air intake is here And the hearth is in this area The main point of the rocket stove is its very long flames, they go into this conduit, go up through here, they lick the ceramic glass, and then go back down, then it goes into the stovepipes We heat the stove for an hour, an hour and a half then the sand will radiate heat for 8 to 10 hours, depending on the size of the stove

A stove fitter from Toulouse, Vital BIES designed the system, and he agreed to share the blueprints Before starting the fire, the stovepipe needs to be pre-heated a little, and that needs to be corrected because it's annoying having to go behind the stove in order to do so We can hear the "rocket" sound Well, it's the sound of a regular stove But it's kind of cool

The second point of the Négawatt approach is efficiency With a very good thermal insulation, we can save up to 80% of the energy Then there's the energy source choice It makes way more sense to heat using local sources, because we often use electricity, but nowadays, electricty counts for 50% of domestic heating, and that's a shame because electricity is made using thermal power plant so we're transforming heat into electricity into heat That is the insulation we have all around the house

It's a blend of linen, cotton, and hemp, mostly recycled, moreover it ages way better than mineral wool, it doesn't pack down It's soft, isn't it ? I use it as mattress when i don't have a sleeping bag Last but not least, it's the renewability of the energy source Our main source is the sun, because even if we're in Brittany, there's still a lot of radiant energy The air in the house is usually at 20°C, so it goes in at 20°C It heats up naturally, and the comes out at about 40°C

But in winter, when the sun shines directly on the south wall, the air can get out at more than 50°C There are no electronic parts whatsoever, so it can never break down We're doing a little experiment with incense to visualize how the solar heater works This is made by professionals, don't try this at home ! What's really interesting in this version, designed by Guy Isabel, is that he replaced the aluminum, which is often found in DIY versions, by slate That prevents toxic fumes that can be found in painted aluminum since slate is a natural black body

It can save, for free, 5 to 7°C of heating every winter That's the end of this episode !We're waiting for your feedback on the stove and the solar heater Do you see yourself installing one, if not, why not ? Don't hesitate to comment ! We'll meet again in one month, to tackle down energy independance ! [Chab] Bye [In breton] [PA] Bye ! Thank you for watching this episode You can help this video by liking and commenting Don't forget to subscribe, and let's sweater up !

Source: Youtube

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