Table 1. Sampling dates and average building parameters over the sampling period.

Sample Number	Start Date	End Date	Average Temperature (°C)	Average Relative Humidity (%)	% Time HVAC On
1	20 January 2014	03 February 2014	19.7	26.6	D
2	03 February 2014	17 February 2014	19.9	31.3	D
3	17 February 2014	03 March 2014	20.5	32.9	D
4	03 March 2014	17 March 2014	20.2	33.4	D
5	17 March 2014	31 March 2014	20.2	35.2	D
6	31 March 2014	14 April 2014	20.6	42.3	D
7	14 April 2014	28 April 2014	20.4	44.2	D
8	28 April 2014	12 May 2014	21.2	49.0	D
9	12 May 2014	27 May 2014A	21.0	49.6	D
10	27 May 2014A	09 June 2014	20.7	55.7	38%
11	09 June 2014	23 June 2014	20.9	54.0	47%
12	23 June 2014	07 July 2014	20.8	56.9	40%
13	07 July 2014	21 July 2014	20.7	57.1	40%
14	21 July 2014	04 August 2014	20.7	58.4	37%
15	04 August 2014	18 August 2014	20.5	62.7	29%
16	18 August 2014	02 September 2014A	20.7	59.8	38%
17	02 September 2014A	15 September 2014	20.5	64.2	33%
18	15 September 2014	29 September 2014	19.7	65.7	17%
19	29 September 2014	13 October 2014	19.0	65.1	13%
20	13 October 2014	27 October 2014	18.2	65.3	10%
21	27 October 2014	10 November 2014	18.0	55.1	21%
22	10 November 2014	24 November 2014	17.8	44.5	40%
23	24 November 2014	08 December 2014	17.0	53.0	29%
24	08 December 2014	23 December 2014B	17.6	45.5	46%
25C	23 December 2014B	05 January 2015	17.7	43.3	38%
26	05 January 2015	19 January 2015	17.9	37.9	60%
27	19 January 2015	02 February 2015	17.6	42.0	47%

^A HVAC filters changed on Tuesday because the daycare center was closed on Monday for a holiday.

^B HVAC filter changed on Tuesday to allow for a sample when the daycare center would be unoccupied.

^C Daycare center closed for the winter holidays, unoccupied except for occasional cleaning workers.

^D No data, as equipment to measure HVAC operation was not set up until 27 May 2014.