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.
Results of Minnesota’s Public Buildings Enhanced Energy Efficiency Program (PBEEEP)
The State of Minnesota’s Public Buildings Enhanced Energy Efficiency Program is modeled after other successful utility programs. PBEEEP seeks to transform the existing building commissioning market in Minnesota from an audit based approach to a data-based investigation.
Small Business Energy Efficiency: Roadmap to Program Design
Designing a successful small business retrofit program requires a paradigm shift from traditional energy efficiency programs.
Efficient Lighting 101
Advances in lighting technologies have huge potential to save energy - if we match them to the proper application.
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.
Energy Efficient Cities: Using a Community-Based Approach to Achieve Greater Results in Comprehensive, Whole-House Energy-Efficiency Programs
The Energy Efficient Cities project was developed to demonstrate the delivery of innovative residential energy-efficiency programs to reduce energy use and environmental impact in at least 6,000 homes through a community-wide partnership approach.
Application of a Linear Input/Output Model to Tankless Water Heaters
This study evaluates the applicability of a linear input/output model to gas-fired, tankless water heaters. The model can be used to reproduce performance metrics, such as the energy factor, and can be used to evaluate the impacts of alternative draw patterns and conditions.
Actual Savings and Performance of Natural Gas Instantaneous Water Heaters
To gain a better understanding of in situ performance, 24 natural gas water heaters were installed in ten Minnesota homes, then extensively monitored and tested under an alternating mode test procedure for 15 months.
Change in Indoor Particle Levels After a Smoking Ban in Minnesota Bars and Restaurants
The primary objective of this study was to provide detailed time-of-day and day-of-week secondhand smoke–exposure data for representative bars and restaurants in Minnesota.
Actual Savings and Performance of Natural Gas Tankless Water Heaters
This project field tested efficiency improvements and energy savings achieved by replacing standard hot water heaters with tankless models.