Scribd
Upload
194 views4 pages

Water Use in Commercial Buildings

The document provides calculators to estimate daily and annual water usage and savings for non-residential and residential buildings. For non-residential buildings, it lists fixture types, consumption rates, daily uses, duration, and occupancy to calculate baseline usage and estimated savings with high-efficiency fixtures. For residential buildings, it does the same but bases occupancy on number of bedrooms. Notes provide maximum consumption values and instructions for metering faucets.

Uploaded by

Nelson Vargas
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
194 views4 pages

Water Use in Commercial Buildings

The document provides calculators to estimate daily and annual water usage and savings for non-residential and residential buildings. For non-residential buildings, it lists fixture types, consumption rates, daily uses, duration, and occupancy to calculate baseline usage and estimated savings with high-efficiency fixtures. For residential buildings, it does the same but bases occupancy on number of bedrooms. Notes provide maximum consumption values and instructions for metering faucets.

Uploaded by

Nelson Vargas
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as XLS, PDF, TXT or read online on Scribd
You are on page 1/ 4

Non-residential Buildings

Baseline Case: change occupant values to reflect anticipated occupancy


Fixture Type Consumption Daily Uses Duration Occupants
1.6 gpf toilet - male (gallons per flush) 1.6 1 1 150
1.6 gpf toilet - female (gallons per flush) 1.6 3 1 150
1.0 gpf urinal - male (gallons per flush) 1 2 1 150
Commercial Lavatory Faucet - 0.5 gpm 0.5 3 0.25 300
Kitchen sink - 2.2 gpm 2.2 1 0.25 300
Showerhead - 2.5 gpm 2.5 0.1 8 300
Total Daily Volume

Annual Work Days


Total Annual Usage

Calculator: To determine estimated savings, insert occupant values (same as Baseline) and
consumption values based on fixtures and fixture fittings installed
Fixture Type Consumption Daily Uses Duration Occupants
1.28 gpf toilet - male (gallons per flush) 1.28 1 1 150
1.28 gpf toilet - female (gallons per flush) 1.28 3 1 150
0.5 gpf urinal - male (gallons per flush) 0.5 2 1 150
Commercial Lavatory Faucet - 0.5 gpm 0.5 3 0.25 300
Kitchen sink - 2.2 gpm 2.2 1 0.25 300
Showerhead - 2.5 gpm 2.5 0.1 8 300
Total Daily Volume

Annual Work Days


Total Annual Usage
Annual Savings
% Reduction

Notes: (1) Values shown in red reflect the maximum consumption values associated with the provisions
called out in the IAPMO Green Plumbing and Mechanical Code Supplement.
(2) If metering faucets are used, insert the flow rate of the faucet in the Consumption column
and insert the cycle time in the Duration column (assume 1 cycle per use).

Residential 3 bedroom structure


Baseline Case: change occupant values based on number of bedrooms (example shown is for 3 bedrooms)
Fixture Type Consumption Daily Uses Duration Occupants
1.6 gpf toilet 1.6 5 1 4
Lavatory Faucet - 2.2 gpm 2.2 8 0.25 4
Kitchen sink - 2.2 gpm 2.2 6 0.25 4
Showerhead - 2.5 gpm 2.5 0.75 8 4
Total Daily Volume
Annual Usage

Calculator: To determine estimated savings, insert occupant values (same as Baseline) and consumption
consumption values based on fixtures and fixture fittings installed
Fixture Type Consumption Daily Uses Duration Occupants
1.28 gpf toilet 1.28 5 1 4
Lavatory Faucet - 1.5 gpm 1.5 8 0.25 4
Kitchen sink - 2.2 gpm 2.2 6 0.25 4
Showerhead - 2.5 gpm 2.5 0.75 8 4
Total Daily Volume

Annual Usage
Annual Savings
% Reduction

Note: Values shown in red reflect the maximum consumption values associated with the provisions
called out in the IAPMO Green Plumbing and Mechanical Code Supplement.
Daily Water Use (gal)
240
720
300
113
165
600
2,138

260
555,750

Daily Water Use (gal)


192
576
150
113
165
600
1,796

260
466,830
88,920
-16.0%

Daily Water Use (gal)


32
18
13
60
123
44,822

Daily Water Use (gal)


26
12
13
60
111

40,442
4,380
-9.8%

You might also like