Modeling Water Efficiency Items in REM/Rate and Ekotrope


This course provides the required credit for Certified Energy Modelers and HERS Raters to meet software training CEU requirements! It guides you through the water efficiency items found in most structures as well as those less common items such as recirculation systems and drain water heat recovery. You will learn how to calculate piping distances for various plumbing types, how to find and record water efficient items, how to determine from plans what type of plumbing system is expected, and the differences in accounting for these systems for single family versus multi-family structures. A description of and calculations for the new Hot Water Distribution System Compactness Factor from the 2021 IECC is included as part of this training.

Water efficiency is the concept of being smart about how we use water and how we heat water. From an energy model perspective, being water efficient also results in the home or unit being more energy efficient, and the energy model will reflect that, if those water efficiency items are included in the energy model. This course helps you understand why water efficiency is important, what items promote water and energy savings and which items reduce effiency and how to model these. You will understand how to determine the efficiency of faucets and showers, how to determine water pipe insulation values, how to calculate pipe lengths, and how to recognize and model recirculation systems and their controls as well as drain water heat recovery systems. This course also covers the new Hot Water Distribution System Compactness Factor found in the 2021 IECC and how that is, or is not included in your energy model.

This course qualifies for the RESNET Requirement for Certified HERS Raters and Certified HERS Energy Modelers to obtain training in their software tool for REM/Rate and for Ekotrope software! Get your CEU's and meet your requirement for recertification!

   Registration Fee: $75.00

Course Outline

Module 1 Course Introduction - What is Water Efficiency?

What do we mean by Water Efficiency and why is this important?  What is covered in this course?  In this module we answer those questions and gain a general understanding of the fixtures and systems that will be covered.

Unit 1 What is Water Efficiency?  
Module 2 Faucets, Showers, and Pipe Insulation

In this module you will learn what it takes to verify whether a fixture is water efficient, what pipes require insulation for efficiency, and how to model these items.

Unit 1 Faucets, Showers, and Pipe Insulation  
Unit 2 Faucets, Showers, and Pipe Insulation Quiz  
Module 3 Plumbing Systems Design

This module dives into the design of plumbing systems and how to decipher these on plan sets.  You will learn the difference between a standard plumbing system and one that incorporates recirculation piping and pumps.  We will cover how to model each of the types of systems, what to do if there are multiple systems, as well as how to calculate and model the distance from the farthest fixture to the water heater as well as loop distances.

Unit 1 Plumbing Systems Design  
Unit 2 Plumbing Systems Design Quiz  
Module 4 Recirculation Systems

This module explains recirculation systems, how to recognize them, how to determine the type of system controls involved, and how to determine pump efficiency.  You also learn how to model each type of recirculation system you might find and understand the differences between single family and multi family modeling for these systems.

Unit 1 Recirculation Systems  
Unit 2 Recirculation Systems Quiz  
Module 5 Drain Water Heat Recovery

In this module you will learn what a Drain Water Heat Recovery system is and how it works as well as the information needed to accurately model this type of system.

Unit 1 Drain Water Heat Recovery  
Unit 2 Drain Water Heat Recovery Quiz  
Module 6 Hot Water Distribution Compactness Factor

The 2021 IECC introduced the ability to verify efficiencies gained by reducing the length of pipe needed to move hot water from the water heater to hot water using fixtures.  This HWDS Compactness Factor provides the ability to prove efficiencies in the design of the plumbing system.  This module describes the theory and application of this calculation as well as how to model the results.

Unit 1 Hot Water Distribution System Compactness Factor  
Unit 2 Hot Water Distribution Compactness Factor (HWDS) Quiz  
Module 7 Water Efficiency Modeling Final Exam

This module holds the final exam for the course.

Unit 1 Water Efficiency Modeling Final Exam  

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