During the autumn of 2023, FIBER hosted Part 5 of its Reassemble Lab: Practising Permacomputing, a concept and a nascent community of practice oriented around issues of resilience and regenerativity in computer and network technology that is derived, among others, from permaculture principles. In opposition to narratives of computational power as weightless and non-materially situated, Cyrus Khalatbari focuses on computer-cooling: the hidden environmental infrastructure upon which platforms operate.