User contributions
- 23:39, 16 June 2023 (diff | hist) . . (+61) . . 2790: Heat Pump (→Explanation)
- 23:37, 16 June 2023 (diff | hist) . . (0) . . 2790: Heat Pump (→Explanation: clarify that the "bellows" are the accordion shaped device)
- 23:36, 16 June 2023 (diff | hist) . . (+321) . . Talk:2790: Heat Pump