Earth Notes: On 16WW Relative Humidity (2010--2013)

Updated 2022-10-02.

Sporadic manually-gathered relative-humidity (RH%) sample data for 16WW. #dataset

A sparse and ad hoc set of manual temperature and relative humidity measurements, now finished. It was collected before OpenTRV's RH%-measuring TRV1s were in place. The OpenTRV devices gather data automatically every few minutes from most rooms.

Note that some exterior temperatures and RH% have been directly measured. Some have been approximated from (often conflicting!) local weather reports.

Dataset

name: 16WW Manual Temperature and Relative Humidity Measurement
description: 16WW Relative Humidity manual sporadic measurements, domestic, Kingston-upon-Thames, London, UK
version: 1
keywords: air, relative, humidity, sample, domestic
variable measured: temperature
variable measured: relative humidity
date published: 2010-09-12T16:14:14Z
date modified: 2013-04-05T17:12Z
temporal coverage: 2010-09-12T16:15Z/2013-04-05T17:12Z
spatial coverage: UK centre 51.406696N,-0.288789E elevation 16m
canonical URL: this descriptive text with markup
distribution: HTML table
is part of: 16WW Dataset
licence: this dataset is licensed under CC0, ie it is effectively public domain; if you make use of this data, attribution is welcome but not obligatory
is accessible for free: true

Data Points

The readings are given in the table below.

All times UTC (Z).

RH is % relative humidity.

16WW Manual Temperature and Relative Humidity Measurements
	Kitchen		Living Room		Front Bedroom		Bathroom		Outside		Notes
Date Time	°C	RH	°C	RH	°C	RH	°C	RH	°C	RH
2010-09-12 16:15Z	22	43	23	40	23	41
2010-09-13 16:45Z	22	67	22	63	21	65	21	66	23	78	Dull and chilly and spotty rain outside.
2010-09-15 18:00Z							21	83			Warm bath in progress.
2010-12-24 14:45Z					15	73					In small bedroom after running dehumidifier ~2h: 15°C, ~50%RH.
2011-12-21 12:50Z							16.8	75.6			Immediately after completion of installation of MHRV in bathroom, after the windows have been open all morning on an overcast and damp day.
2011-12-21 17:43Z							15.9	85.2			With six people in the house (including two small children running around) and some cooking, the fan cut in, so I adjusted it a little so as not to come on until ~85%RH.
2011-12-21 18:41Z							18.0	92.9			Bath run, children in it, fan on boost, and RH staying below 100%, so no condensation on mirrors, though some on the window. After a few minutes the RH was dropping a little (to ~90%) and the temp rising (to ~18.4°C).
2011-12-22 09:30Z							19.9	81.7			Fan has been running for a few minutes after being completely off all night; no windows open.
2011-12-22 12:41Z							17.4	79.2			External air temp ~15°C, fan running on low, central heating off.
2011-12-22 13:44Z							17.3	77.3			Fan running on low, central heating off.
2011-12-22 18:51Z							17.7	83.8			Fan running on low, supper finished (ie cooking), external RH ~85%.
2011-12-23 07:30Z							16.7	86.3	11		Fan running on low all night, ~11°C outside, some (but not much) condensation on bedroom windows.
2011-12-23 15:00Z							20.1	>95			After an hour's hot bath with the fan managing to keep the room from customary steaminess.
2011-12-24 09:50Z							15.3	76.0	4		Fan running on low all night, ~4°C outside, some condensation on bedroom windows.
2011-12-27 13:30Z							13.5	73.1			House unoccupied since about noon on 24th, fan turned completely off at mains, external temperature ~10°C.
2011-12-27 19:27Z			17.4	65.3							Have had central heating on at ~16°C.
2012-01-06 12:00Z							16.2	80.4	7	76	Fan on low, incoming air 14.7°C; ~7°C and 76%RH outside. In small rear bedroom (boy's) at 12:40, 17.2°C and 71.4%RH.
2012-01-06 15:30Z							15.8	79.0	8	80	Fan on low, incoming air 14.9°C; ~8°C and 80%RH outside.
2012-01-13 11:30Z	14.6	64.3			15.6	65.4	15.6	67.8	6	90+	(Outside humidity at least 90%.) Windows had been open while MHRV was being worked on; outside ~6°C and 90+%RH. Kitchen measurements an hour later with laundry drying on clothes horses but portable dehumidifier operating for an hour. Kitchen warmed up, because rad had been on when people in there, but RH fairly constant over next few hours and dehumidifier extracted a a decent glassful of water. By 4pm bathroom was up to ~77%RH but with temperature little changed.
2012-01-13 20:15Z	19.6	56.5									Kitchen warm, humidity low even after some cooking, etc; laundry reasonably dry. Dehumidifier running about 9h at 180W (as previously measured) or ~1.7kWh, and removed ~1.5l of water from the air.
2012-01-16 18:30Z	19.0	63.2	18.2	64.1	17.4	71.9	16.0	76.4	3	70	MHRV running again since early this morning, crisp and close to freezing outside all day, and dehumidifier was running in kitchen much of the day to contain moisture from laundry drying. Rear small bedroom at 16.3°C/70.3%RH.
2012-01-31 22:30Z					19.1	58			0	80	Had put heating up to ~19°C in all upstairs rooms for afternoon with room doors open to encourage air circulation.
2012-02-01 07:15Z	16.3	58			14.3	63			0	80	Had front bedroom window open a crack (and breezy all night outside) to encourage air intake there and flow to bathroom; much less condensation there and on other bathroom windows than normally expected with this external temperature.
2012-02-10 15:30Z	17.0	55.6	18.5	50.5	16.9	60.5	15.9	64.4	1	52	Has been cold outside (around or below freezing mainly) and low RH for about a week now. (Readings taken over span from 15:30 (sunny) to 17:50 (after sunset) in order LR, K, FB, B with exterior temperature dropping to -1°C.)
2012-03-30 13:30Z	19.8	47.2							16	55	Has been warm and sunny for several days and we have had windows open during the day (and the MHRV off except at night).
2012-07-09 09:30Z	22.7	64.5	22.5	61.5	22.3	63.7	22.1	65.8	17	80	Some laundry drying in kitchen as damp and dark outside (has been a very wet three months) though internal %RH has been more typically 40--50.
2012-09-10 16:25Z			28.3	37.5					25	45	Sunny and warm, patio door open!
2012-10-12 18:25Z	20	62	20	63	20	66			10	73	Testing two new temp/RH displays; I don't trust any to better than +/- 1°C/1%RH but otherwise good!
2012-10-14 11:07Z	16	65					16	67	10	66	Now bright and sunny outside; had been near freezing overnight. After a long hot bath the bathroom temperature was up a couple of degrees, with the MHRV keeping humidity under some sort of control, ie walls not dripping, mirrors misting and demisting; outside the condensate could be seen dripping as designed.
2012-10-28 16:21Z	14	66			14	70			9	88	House has been empty for a day, with outside temperatures between about 2°C and 10°C and heating had probably stayed off (was set at ~11°C as frost protection). MHRV has been on. Boy's bedroom 67%RH @ 14°C.
2012-11-26 15:22Z	17	72			18	72			8	88	New Vent-Axia Lo-Carbon Tempra just fitted in kitchen earlier today; laundry drying nearby (RH reading went up to 74% when laundry right next to meter). Dark and damp outside. Girl's bedroom 16°C and 75%RH; house was aired during fan-fitting work.
2013-04-05 17:12Z	18	40	19	39	18	40	18	40	9	44	Windows open for the first time in a while, given the sunshine. MHRV seems to have been consistently keeping RH in range ~50--70%.