Reports & Materials

Webinar

Demand Control Systems Deliver Efficiency in Commercial Hot Water Use

Technical overview of the effectiveness of new demand control systems to reduce heating and pumping costs from hot water circulation in hospitality and commercial venues.

Technical Report

Simple Retrofit High-Efficiency Natural Gas Water Heater Field Test

Four high-efficiency natural gas water heaters were installed in homes to characterize their savings potential, installed efficiencies, and abilities to meet household demands.

Presentation

Field Study of an Intelligent, Networked, Retrofittable Water Heater Controller

This presentation was given at the 2017 ACEEE Hot Water Forum.

Data & Reference

Utility Heat Pump Water Heater Calculator

Using several simple inputs, this application will determine the estimated savings and payback period for installing a heat pump water heater as a replacement for standard electric resistance water heating.

Presentation

Combi Systems: Lessons Learned from the Field

Introduction to the technology and a discussion of lessons learned from a 200 system install project. Presented at the Presented at the ACEEE 2015 Hot Water Forum.

Data & Reference

Heat Pump Water Heater Calculator

Using several simple inputs, this application will determine the estimated savings and payback period for installing a heat pump water heater as a replacement for standard electric resistance water heating.

Presentation

Tankless Water Heaters Update

Updates on water quality and installation issues, efficiency and savings, occupant satisfaction, and impact on gas distribution presented at the MN Blue Flame Gas Association Expo.

Presentation

Tankless Water Heaters - Do They Really Save Energy?

Technical Report

Tankless Water Heaters: Do They Really Save Energy?

The in situ efficiency of the storage water heaters was nearly 20% lower than rated, while that of the tankless water heaters was only 10% lower. This paper will discuss the causes, consequences, and possible ramifications of this reduced efficiency.

Technical Report

Measured Residential Hot Water End Use

High-resolution data on draw volume, length, flow rate, and spacing both overall and by hot water end use; based on data collected in ten homes in the Minneapolis/St. Paul metro area.