Net-zero Bathroom Calculations | https://tinyurl.com/net-zero-bathroom

	A	B	C	D	E	F	G	I	K	L	M	N	O
1			Conversions
2	DP	DZ	in^3 to Gallons	0.00433
3	DP	DZ	m^2 to in^2	1550				Roof Diameter (in.) =	379		Area =	101570	Sq Inches
4	DP	DZ	ft^3 to m^3	0.0283
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7			Capture Area for 1 Structure
8	DP	DZ	Surface Area (sq ft)	705	ft^2
9		DZ	Surface Area (sq m)	65.5	m^2
10	DP	DZ	Surface Area (sq in)	101570	In^2
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12			Demographics
13	DP	DZ	Females Using Structure	20
14	DP	DZ	Males Using Structure	20
15	DP	DZ	Males Using Dry Urinals (T/F)	TRUE
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17			Toilet Use
18	DP	DZ	Average #1 bathroom visits per person per day	5	time(s) a day
19	DP	DZ	Average #2 bathroom visits per person per day	1	time(s) a day
20	DP	DZ	Gallons for #1 flush	0.5	gallons
21	DP	DZ	Gallons for #2 flush	0.8	gallons
22	DP		Water used from Sinks to Toilets (T/F)	FALSE
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24			Sink Use
25	DP		Faucet Flow Rate	0.35	Gallons per Minutes
26	DP		Minutes of Handwashing per person per use	0.33	Minutes
27	DP		Additional Handwashing per day (not for Toilet use)	0	Times
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29			Tank Requirements
30	DP		Amount of Water Immediately Available	500	Gallons
31	DP		Max Capacity of Tank = twenty two 55-gal drums	1210	gallons
32	DP		Volume of Tank (ft^3)	161.8	ft^3
33	DP		Volume of Tank (m^3)	4.6	m^3
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35			Water Needs Calculations - 1 Structure
36	DP		Net Gallons Needed for Flushing	82	gallons per Day
37	DP		Net Gallons Needed for Flushing (31 days)	2542	gallons per Month
38	Dp		Net Gallons Needed for Sink	28	gallons per Day
39	DP		Net Gallons Needed for Sink (31 days)	868	gallons per Month
40	DP		Net Gallons Total	3410	gallons per Month
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42			NOAA Nominal Rainfall for Area	(in)	Structure-Roof Gallons Captured	Additional Gallons from 1/2 of Tropical Atrium and Adjacent Shower Structure	Net-Gallon Surplus
43			Jan	1.86	817.8	2456.2	364.0
44			Feb	1.73	760.7	2284.5	329.2	http://www.idcide.com/weather/
45			Mar	1.91	839.8	2522.2	281.2
46			Apr	0.95	417.7	1254.5	-1346.6
47			May	0.68	299.0	898.0	-3559.6
48			Jun	0.40	175.9	528.2	-6155.5
49			Jul	1.05	461.7	1386.6	-7717.3
50			Aug	1.45	637.6	1914.8	-8575.0
51			Sep	1.37	602.4	1809.1	-6164.5	Tropical Atrium Collection Area:
52			Oct	1.35	593.6	1782.7	-7198.2	TA Roof Diameter:	60	feet	720	inches
53			Nov	1.18	518.8	1558.2	-8421.2	TA Area:	2826	sq feet	406944	sq inches
54			Dec	1.01	444.1	1333.7	-10053.3	Shower Collection Area:	705	sq feet	101570	sq inches
55	DP		Totals	14.94	6569.0	19728.6	-10053.3
56	DP		Averages	1.245	547.4	1644.1	-837.78
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58
59			Calculating ideal rainfall for the current roof design:
60	DP		Gallons of water needed:	3410	gallons
61	DP		Catchment area of roof:	101570	square inches
62	DP		Conversion of gallons to cubic inches:	787710	cubic inches
63	DP		Cubic inches needed divided by catchent area =	7.76	inches
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65
66			Calculating roof size if no additional catchement areas:
67	DP		Gallons of water needed:	3410	gallons
68	DP		Conversion of gallons to cubic inches:	787710	cubic inches
69	DP		Average rainfall for our area:	1.25	inches
70	DP		Cubic inches needed divided by average rainfall =	630168	square inches
71	DP		% Increase in roof size needed for this:	520%
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