Table 1.

Volumetric flow (cubic meters per hour) and air exchange rates (air changes per hour) measured during the demonstration

Parameter		BED1	BTH1	BED2	BTH2	BED3	BTH3	BED4	ISR*	ISA	ISB	UTL†	ANT	IWH
Surface area (m2)		25.5	6.9	29.8	5.3	25.5	6.9	25.5	18.1	5.7	6.3	15.6	11.9	—
Volume (m3)		69.9	16.9	81.8	13.0	69.9	16.9	69.9	49.6	15.6	15.3	47.5	32.6	—
Pretest	∑Supply	505	—	0	—	395	—	0	327	121	—	154	—	4745
	∑Return	319	—	443	—	356	—	270	529	337	—	N/A	—	—
	∑Exhaust	—	189	—	230	—	172	—	—	—	398	—	—	—
	AER	7.2	11.1	5.4	17.7	5.6	10.1	3.9	10.7	21.6	26.0	3.2	—	—
Negative-pressure demonstration	∑Supply	432	—	0	—	396	—	0	346	135	—	164	—	3781
	∑Return	343	—	482	—	386	—	325	563	347	—	N/A	—	—
	∑Exhaust	—	161	—	200	—	159	—	—	—	385	—	2209	—
	AER	6.2	9.5	5.9	15.4	5.7	9.4	4.6	11.4	22.2	25.2	3.5	67.7	—
Posttest	∑Supply	391	—	0	—	433	—	0	N/A	136	—	N/A	—	N/A
	∑Return	340	—	425	—	391	—	297	N/A	306	—	N/A	—	—
	∑Exhaust	—	170	—	195	—	170	—	—	—	382	—	—	—
	AER	5.6	10.0	5.2	15.0	6.2	10.0	4.3	N/A	19.6	25.0	N/A	—	—

AER, air exchange rate; ANT, temporary anteroom; BED1, bedroom 1; BED2, bedroom 2; BED3, bedroom 3; BED4, bedroom 4; BTH1, bathroom 1; BTH2, bathroom 2; BTH3, bathroom 3; ISA, isolation anteroom; ISB, isolation bathroom; ISR, isolation room; IWH, isolation ward hallway; N/A, not applicable; UTL, utility closet.

^*Only 2 of 3 return registers were measured; therefore, the total return and AERs listed here are underestimates of the actual rates. Estimating the AER for the ISR using the design flow rate for the unmeasured register resulted in pretest and demonstration phase AERs of 15.5 and 16.1 air changes per hour, respectively.

^†UTL return register could not be accessed for measurements.