Ah, “Blocks, Barracks, Tropical, Troops for the use of”
Mind you, there were original parts of the OM at Tengah which were a bit like that. I spent my first few weeks in one before an ‘air-conditioned’ one became available. Louvre doors at both ends, and a languid fan dangling from a high ceiling. Adding the mossie net and I knew I was in the Far East! Loverley! Sadly no camera back then ... I hadn’t had time to go to Changi Village!