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WATER DEMAND CALCULATOR

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Overview

This Water Demand Calculator estimates the supply demand for residential buildings including single- and multi-family dwellings, as well as cold and hot water branches and risers for indoor water use.

Estimating Plumbing Sizing for Water Demand

Design a better plumbing system to deliver water effectively while conserving water and maximizing comfort. 

Watch Practically Perfect Plumbing Part 1 and Part 2 (CEU webinars) for further guidance. 

Access the We Stand Water Demand Calculator

Related Resources

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DOE: Heat Pump Water Heater Installation Tool

Use DOE's Heat Pump Water Heater Installation Tool to help you through the decision-making process for heat pump water heater (HPWH) product selection and installation.

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DOE: Heat Pumps & Heat Pump Water Heaters Guides

Check out the DOE's Energy Efficiency & Renewable Energy website Heat Pump Guides.

Download this BPA resource

ACEEE: Policy Brief: Demand Flexibility of Water Heaters

A new ACEEE policy brief explains what demand flexibility is, how water heaters can accomplish it, and why state or federal legislation is needed to make this capability universal.