3 ms·
It's somehow strange because in any sunny place, all you need to have hot showers is a black surface tank. Could have been done very long ago at scale.
by agumonkey 4y ago
It's somehow strange because in any sunny place, all you need to have hot showers is a black surface tank. Could have been done very long ago at scale.
- hansvm 4y agoIn sunny places that either aren't too cold or have access to high quality transparent insulation.