Table 1: Water and electricity consumption and cost per treatment for various combinations of treatment duration and dialysate flows (not including cost of intermittent chemical disinfection)

Duration	Water				Electricity		Total cost per treatment, $
Duration	Per treatment dialysate desired, L	Per treatment water consumption, mean ± SD, m³ at 20°C n = 5	% Dialysate desired to water consumed	Per treatment water cost*, $	Per treatment electricity consumption, mean ± SD, kWh at 20°C n = 5	Per treatment electricity cost†, $	Total cost per treatment, $
6 h × 300 mL/min	108	0.8052 ± 0.0390	13	2.61	4.25 ± 0.46	0.38	2.99
8 h × 300 mL/min	144	1.0128 ± 0.0478	14	3.29	5.16 ± 0.48	0.46	3.74
4 h × 500 mL/min	120	0.6675 ± 0.0328	18	2.17	3.68 ± 0.22	0.33	2.49
6 h × 500 mL/min	180	0.8987 ± 0.0216	20	2.92	4.70 ± 0.28	0.42	3.33
2 h × 800 mL/min	96	0.4829 ± 0.0168	20	1.57	2.64 ± 0.23	0.23	1.80
3 h × 800 mL/min	144	0.6047 ± 0.0288	24	1.96	3.40 ± 0.26	0.30	2.26
4 h × 800 mL/min	192	0.7344 ± 0.0244	26	2.38	4.04 ± 0.38	0.36	2.74

Note: SD = standard deviation.

*Assumes a water cost of $3.2438/m³ and includes a 60-min pretreatment machine warm-up and operations check in addition to a 45-min posttreatment heat disinfection cycle.

†Assumes an electricity cost of $0.089/kWh and includes a 60-min pretreatment machine warm-up and operations check in addition to a 45-min posttreatment heat disinfection cycle.