HPJ

Have trees for shades and a fishpond with downward water flow before the wind enters the house with natural ventilation like the illustration enclosed will make you happier than finding answers for the geothermal heating/cooling solutions.

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Plants surround the house, a good heat insulation on the roof and extended height roof top ventilation fans (2 meters from the roof top) can help cooling down the house for more than 5 degrees Celsius without engaging electricity.

Natural convection, shading and evaporation are both involved in this cooling.

If enough rooftop fans are installed, you don't even need a electric fan.

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Try apply for a electronic/internet transaction capable debit card from bank together with online banking and use it on line in place of credit/debit card. I used it for more than 5 years including transactions to/from Paypal. The debit/ATM card need at least 3 days processing.

Hope this helps.

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