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Energy Newsbriefs Blog

This current awareness service is prepared by the WSU Energy Program Library with funding from the U.S. Department of Energy State Energy Program. This information is provided for energy professionals and interested members of the public to highlight recent energy-related news, articles, and reports that discuss energy efficiency, energy conservation, and renewable sources of energy in engineering and policy circles.


Category: Water Heating

Water Heating

What Owners Need to Know About ... Tankless Water Heaters

HPAC Engineering, Sep. 2015, by Kunal Shah.

"For the new generation of mechanical rooms, lower operating costs, greater reliability, and environmental-friendliness are the name of the game. This is leading consulting-specifying engineers, architects, and facility owners and managers to leave no stone unturned in their search for the best possible return on investment (ROI). Considering water-heating systems typically are second only to HVAC systems in terms of energy consumption, even small gains in efficiency and cuts in operating expenses related to water heating can have a large impact on a facility’s bottom line. For this reason, tankless water-heating systems are gaining traction."

Combination Ductless Heat Pump & Heat Pump Water Heater Lab and Field Tests

Northwest Energy Efficiency Alliance (NEEA), Aug. 26, 2015, by Energy 350.

New NEEA Report: "This report summarizes the lab and field test findings for Mitsubishi’s prototype Ductless Heat Pump (DHP) Plus H2O product. This product combines a ductless heat pump with a heat pump water heater into a single, integrated product. Mitsubishi has teamed with a water heater partner for the water heater portion of the product. NEEA has partnered with Mitsubishi to test the appliance and to provide feedback regarding performance. NEEA has selected Energy 350 to conduct the testing and reporting."

Laboratory Assessment of Stiebel-Eltron Accelera 220 E Heat Pump Water Heater

Northwest Energy Efficiency Alliance (NEEA), July 30, 2015, by Nicholas Kvaltine and Ben Larson (Ecotope, Inc.)

"The Northwest Energy Efficiency Alliance (NEEA) contracted with Ecotope, Inc. and Cascade Engineering Services, Inc. to conduct a laboratory assessment of the Stiebel-Eltron Accelera 220 E heat pump water heater (HPWH) for northern climate installations. Cascade Engineering evaluated the Accelera 220 E using a testing plan developed by Ecotope to assess HPWH performance. Overall, the results suggest that the Stiebel-Eltron Accelera 220 E is a highly-efficient water heater."

Efficient Hot Water Systems

Consulting-Specifying Engineer, May 2015, by Cynthia Callaway.

"Engineers should work to design the most efficient water heating system or boiler possible. Understanding the codes/standards is paramount, followed by knowledge of the key equipment functions of boilers and similar systems."

Choosing Tankless: When and Where the Newer Tankless Water Heaters Work Best

Business Energy, May 2015, by Carol Brzozowski.{}

"When it's time to replace a water heater--or put one into a newly constructed building--facility managers can choose between the traditional storage tank heater or tankless."

Industry Prepares for New Residential Water Heater Standards

Air Conditioning, Heating & Refrigeration News, Feb. 9, 2015, by Jen Anesi.

"New minimum energy-efficiency standards go into effect for nearly all residential gas and electric water heaters on April 16, 2015. The set of rigorous rules are the third generation of standards the U.S. Department of Energy (DOE) has issued for the equipment under the National Appliance Energy Conservation Act of 1987 (NAECA). While the new efficiency standards do not require manufacturers to use any specific technologies to achieve the new EF (energy factor) ratings, they’ve already necessitated a significant redesign effort from manufacturers."

High-Efficiency Condensing Boilers for Multifamily Applications

Heating/Piping/Air Conditioning Engineering, June 2014, by Tracy Young.

"Just over a decade ago, a new heating/heating-and-water-heating option for multifamily dwellings arrived in North America: the high-efficiency wall-hung condensing boiler. A standard in Europe for many years, these units save space and reduce utility bills while continuously providing heat and hot water to tenants. Units decrease utility bills, boost tenant satisfaction."

Energy Management and Water Heating Systems

Consulting-Specifying Engineer, May 2014, by Peter D. Zak.

"Over the years, HVAC engineers have been challenged to provide more efficient and sustainable designs that meet societal demands to reduce the overall carbon footprint of a facility. Performance guidelines provided by programs such as the U.S. Green Building Council, Green Globes, and Energy Star provide guidelines for energy efficiency, while agencies such as the Environmental Protection Agency (EPA) and the Dept. of Energy (DOE) establish compliance guidelines for commercial HVAC systems."


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