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Submission + - Using a Ground Source Heat Pump System in China (olino.org) 1

MtHuurne writes: We regularly read about China's problems with pollution. You may have heard that China is also investing a lot in renewable energy such as hydro, solar and wind. However, there are also smaller scale initiatives like people installing a ground source heat pump in their home. The article documents the installation of such an efficient heating system with text, photos and diagrams and discusses the costs and expected savings.

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Every nonzero finite dimensional inner product space has an orthonormal basis. It makes sense, when you don't think about it.

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