It's such a good improvement and so obvious in hindsight - that's what makes you wonder why it's not always been done this way.
The only question is whether the vacuum will leak through the plastic over the years and if it can be "revacuumed" to maintain it. If that's an expensive process (I'd prefer some sort of schrader valve to DIY it).
Kopites_Roar t1_j28b61j wrote
Reply to Liebherr announces worlds first refrigerator that uses a vacuum in conjunction with finely ground and sustainable lava stone, to insulate its appliances. For the very first time, it is possible to produce freezers with the energy efficiency class “A” in accordance with EU while offering 25% space by rosesandtherest
It's such a good improvement and so obvious in hindsight - that's what makes you wonder why it's not always been done this way.
The only question is whether the vacuum will leak through the plastic over the years and if it can be "revacuumed" to maintain it. If that's an expensive process (I'd prefer some sort of schrader valve to DIY it).