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Table 3 Mean indoor temperature (°C) per school per week

From: A ventilation intervention study in classrooms to improve indoor air quality: the FRESH study

  

Week 1

Week 2

Week 3

School

Condition

n

mean

sd

n

mean

sd

n

mean

sd

E1

Intervention 1 (800–1200)

344

20.2

1.4

344

20.3

0.9

280

20.3

0.9

E2

352

21.1

1.1

345

19.1

0.8

294

19.1

0.8

E3

286

21.0

0.9

285

19.3

1.7

320

19.3

1.7

E4

215

19.2

1.1

312

18.5

1.2

350

18.5

1.2

E5

347

21.2

1.1

295

21.4

1.5

257

21.4

1.5

E6

255

20.4

1.0

270

20.2

0.5

297

20.2

0.5

E7

Intervention 2 (1200–800)

356

21.6

0.9

356

20.4

1.0

356

20.4

1.0

E8

354

19.2

0.8

321

19.7

1.2

353

19.7

1.2

E9

265

21.8

1.5

301

20.8

1.9

336

20.8

1.9

E10

222

23.0

0.8

272

23.3

0.9

334

23.3

0.9

E11

367

20.9

1.1

352

20.8

1.3

336

20.8

1.3

E12

347

22.0

1.3

343

21.1

0.8

309

21.1

0.8

C1

Control

380

22.6

1.2

379

20.6

1.5

379

20.6

1.5

C2

342

21.2

0.8

342

20.7

0.6

342

20.7

0.6

C3

351

19.8

1.3

335

20.1

1.6

327

20.1

1.6

C4

350

20.9

0.6

340

21.8

0.8

340

21.8

0.8

C5

353

20.4

1.2

328

22.3

0.6

312

22.3

0.6

C6

282

19.7

1.0

344

20.1

1.0

336

20.1

1.0