31 July 2018
- 00:5400:54, 31 July 2018 diff hist +277 Swimming pools Section added on how to keep the pool warm during cold season
16 July 2018
- 08:2508:25, 16 July 2018 diff hist +108 m Solar power →See also
11 July 2018
- 09:1009:10, 11 July 2018 diff hist +41 m Solar power →History
- 09:0809:08, 11 July 2018 diff hist +306 m Solar power →History
9 July 2018
- 08:2108:21, 9 July 2018 diff hist +366 m Solar hot water pools Information about roofs and efficiency - material and color