Io House was the boarding school where Arnold Rimmer was educated.
Rimmer spent several years at Io House. His schoolmates included Fred Holden and Porky Roebuck. Rimmer was considered extremely wet and weird by his teachers, especially Bull Heinman, the gym teacher (Better Than Life). He took great delight in tormenting Rimmer, who captained the school skipping team (RD: Back in the Red II). Rimmer was made to take extra rugby practice to overcome his wetness (RD: Timeslides).
Rimmer was also unpopular with his schoolmates, who refused to call him by his self-appointed nickname, "Ace". They instead referred to him as "Bonehead" (RD: Kryten). Rimmer considered Io House to be an awful school, blaming it in part for his lack of success in later life (RD: Dimension Jump).