97 Unit Building - circa 1960 Year of Construction. Savings = $70 / day or $25,760 over one (1) Year.
Total Project Cost: Parts + Materials + Labour = $23,500. Payback: 11 mos

55 out of 97 Toilets were replaced with 3.0L units
Showerheads upgraded to 1.5 GPM
Kitchen Aerators upgraded to 1.5 GPM
Bath Vanity Aerators upgraded to 1.0 GPM

Leak Rate from 18.6% to 0.0%

Day	Leak	Total Volume	Leak as % Total
Thurs	11,282	60,599	18.62%
Fri	7,497	48,615	15.42%
Sat	5,979	46,791	12.78%
Sun	5,878	58,749	10.01%
Mon	5,878	47,386	12.40%
Tues	2,008	43,580	0.46%
*Wed ()**	0	16,466	0

Before: Consumption per unit / day = 0.62 m3 / unit / day. After: Consumption per unit / day = 0.45 m3 / unit / day

As a result of:

replacing toilets that were > 3.0 L
replacing shower heads and;
installing aerators on kitchen sinks and bath vanities

The leak rate as a percentage of total consumption was reduced from 18% to 0%. In addition to eliminating the leaks, the per unit usage on a daily basis has dropped as a result of the more efficient toilets being rolled out. The building inventory of toilets are now all 3.0L with a mix of ProFlo (new ones installed) and Hennesy Henchcliffe (legacy 3.0 L already installed).