Effects of minor household interventions to block draughts on social housing temperatures: a before and after study

Figures & data

Figure 1. Indoor temperatures before and after the intervention.

Figure 2. Outdoor temperatures before and after the intervention.

Table 1. Mean temperatures before intervention.

	Mean temperatures (°C)
	Morning (7–9 am)	Day (9 am–5 pm)	Evening (5–11 pm)	Night (11 pm–7 am)
Indoors – living room	16.7	17.8	19.7	17.5
Outdoors	11.5	12.4	11.7	11.0

Table 2. Mean temperatures after intervention.

	Mean temperatures (°C)
	Morning (7–9 am)	Day (9 am–5 pm)	Evening (5–11 pm)	Night (11 pm–7 am)
Indoors – living room	16.5	17.5	19.5	17.4
Outdoors	8.5	10.6	9.5	8.4

Table 3. Regression analysis.

	Unstandardised coefficients		Confidence interval	t-value	p-value
	B	Standard error
Before and after intervention (°C)	1.36	0.14	1.09–1.63	9.82	<.01
Outdoor temperature (°C)	0.34	0.01	0.32–0.36	33.16	<.01
Interaction of outdoor temperature and intervention (°C)	−0.09	0.01	−0.11 to −0.06	−7.05	<.01
Unit B (°C)	−0.26	0.04	−0.34 to 0.17	−5.92	<.01
Unit C (°C)	4.02	0.04	3.93–4.10	93.94	<.01
Unit D (°C)	2.11	0.04	2.02–2.19	49.24	<.01
Unit E (°C)	−1.21	0.04	−1.30 to −1.13	−28.37	<.01

Note: Indoor temperatures were measured at 10-min intervals and averaged for each hour to compare with hourly outdoor temperature measurements.