GFX Wastewater Heat Reclaimer in Contention

The GFX (gravity film exchange) device that captures heat from drainpipes and uses it to preheat supply water (see EBN Vol. 6, No. 8) is a great idea according to building scientists, but getting it into the marketplace has been a struggle. With
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GFX Wastewater Heat Reclaimer in Contention

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