FIXTURE CALCULATIONS

THIS CALCULATION CHART ALLOWS ONE TO FIGURE OUT HOW MUCH WATER WILL BE USED PER DAY IN A BUILDING BASED ON THE CODE OCCUPANCY LOAD. WATER WILL BE USED IN THE RESTROOMS FOR WASHING HANDS AND FLUSHING TOILETS. IF THE BUILDING HAS SHOWERS, A KITCHEN, OR BREAK ROOM - THESE WILL BE INCLUDED IN THE TOTAL CALCULATIONS WITH REGARDS TO ANNUAL WATER CONSUMPTION.

In-Class Exercise #05, Part 2: Water Use

What is the annual water consumption for the office space described below?

Demand

• 28 employees - 20 of these work full time (40 hours/week) - 8 of these work part time (20 hours/week) • 160 visitors per day • 1 breakroom • 1 employee shower

Assumptions

• Population is 50% male/50% female • Men’s room has urinals and toilets • 260 work days or 2,080 work hours in one year • “gpf” = gallons per flush • “gpm” = gallons per minute

Fixture Flow Rates

• High-efficiency toilets and urinals • Conventional public lavatories • Low-flow kitchen sink in breakroom • Low-flow shower

Your Task

Calculate Annual Water Consumption

Step 1:

Determine the FTE (Full Time Equivalent)

20 full time employees + 8 part time employees = __ FTE

Step 2:

Using Chart A and B, fill in the ”In-Class Exercise #05, Part 2: Water Use Chart” on the following page of this document.