A stand-alone collection of sensor data from 16WW rooms and radiatorsmainly from the start of 2025, the first full year of the 16WW heat pump. 16WW is a ~1968 ~76m^2 timber-frame end-of-terrace 3-bedroom housein Kingston-upon-Thames, ie suburban London UK. The data is temperature at ~30s intervals and ~1/32K granularity,relative humidity at 60s intervals. Room sensors were mounted ~1m--2m from the ground, on interior walls,away from heat sources and direct sunlight, and obvious drafts. Radiator sensors were fixed to the front of the radiator at flow/return ends,or on the pipes close to the radiator body, as noted for each sensor.1gM was mounted on the vertical/horizontal centre of the front faceof its radiator, nominally at its mean-temperature point.