The renewable heating system right below your feet | Kathy Hannun

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Of all the mundane yet astonishing marvels of human ingenuity, knowing what it takes to heat a room to a comfortable temperature is TED Fellow Kathy Hannun's favorite. She takes us on a journey across the planet and under the sea to emphasize the dangers of modern heating, and offers a safer, planet-friendly alternative that taps into the geothermal energy right below our feet.

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31 Comments on The renewable heating system right below your feet | Kathy Hannun

    • University of Michigan is on it.
      Also they are doing a groungbreaking new hydropower for small speed water, called Vortex Hydro Energy, which can even work in the small streams of Michigan and many other nations worldwide.

    • It cost thousands to put this in..the energy companies need to use this instead of us. Then we buy the electricity. Not HVAC

    • my parents installed one when they built their house; it works fine for 16 years now;
      one compressor died recently and had to be exchanged. 600 EUR, but that´s about it. not even adjustments or calibration needed.

  1. Ground based heat pumps are unaffordable still, and the consumer cannot do anything about it. Depending on cost of energy and usage i’ll make a rough guess (based on my bills and cost of installation here), it’ll be an average of 25yrs before you could break even on the investment. Older homes will require further investment from the consumer to fully insulate the home to allow the heat pumps to keep up. It’s only really a good idea if the house builders integrate these in to new builds.

    • It depends. Its just fine here in Finland. Our house from 1953 has had “enough” insulation (only packed sawdust!) from the start and even air-to-water heatpump is enough. There were a rumor that our area would not accept heat wells (we have lot of clean drinkable ground water, so they think that it would be compromised when drilling through it), so we got that air-to-water heat pump instead. After that, several neighbors have installed geothermal heat pumps, both in the new houses and to as old as ours. For some reason those are mostly drilled holes (usually around 100 meters) and not just plastic pipes laid under couple meters of ground here. There’s a difference if you dig out all of your back yard for the pipe field or just get the drilling crew and go directly down and make a mess for 10-20 square meters, with mostly water.

    • Works well in certain applications but you are spot on for the up front cost. Thats why gas is so cheap because it is on your utility bill forever and not your mortgage. Same as electric cars, upfront costs. Those things are changing though as new builds generally have airconditioning so the air to air component is already there. I think the triple threat for new-builds are solar, battery buffer and air to air heat pump. I have some neighbours that are all in and their payback is in the 10 year sweet spot. I am optimistic we are on a new S curve on this as its economical.

  2. in Denmark, we just burn our trash, filter it so it’s safe for the environment, and heat up water, that we flow to houses so we have floor heating

  3. guys theres this system, hear me out, that I founded a company to take advantage of! it would be REALLY awesome if everyone switched to it right now… (obviously it is a good idea but come on)

  4. This has been around for years, and in my 15 years of HVAC in multiple states like Idaho, Oregon, North Dakota ive seen about 3 installed personally very few ever ask about it but when they do they see the amount of work that goes with it and the price and run away. Lol

  5. lulz.
    I didn’t knew that you need just some feet under de ground. I really thought you neeed to dig deep and only some places could use geothermal

  6. I’ve been in caves in Alaska that go deep Underground the hold a consistent comfortable temperature that was 30 years ago

  7. Not to confuse the issue with facts but in the US, 60% of the electricity needed to operate the heat pump comes from either coal or natural gas.

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