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PROUDLY
MADE IN
THE USA |
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As an Energy Star® Partner, Energy Kinetics has determined that this product meets Energy Star® guidelines for energy efficiency. |
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"An annual efficiency that considers domestic hot water as well as heating provides a better measurement of performance than AFUE alone. So the re-evaluation of AFUE measurement is needed to help consumers reduce energy use."
-Dr. Thomas Butcher
Lead Scientist
at Brookhaven National Laboratory
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The U.S. Department of Energy's Brookhaven National Laboratory confirms: Energy Guide (AFUE) ratings miss significant areas of energy loss1
Savings with System 2000 are much greater than with comparably rated heat and hot water systems. System 2000 had the highest annual efficiency in the study - even better than the 95% AFUE boiler tested.
What many homeowners, business owners and heating professionals don't know about AFUE increases heating bills and wastes energy. The bar graph below compares AFUE ratings to the real efficiency delivered for space heating and water heating over the course of a year. Be sure to take a look to get a better understanding of real efficiency to cut your fuel bills.
Real Fuel Efficiencies
Shown below are comparisons of fuel efficiencies among typical and top rated available home heat and hot water systems.
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| Real Efficiencies (Idle Loss Findings) |
This chart summarizes findings in U.S. Department of Energy’s Brookhaven National Labs studies.1
The large yellow numbers indicate real efficiencies.
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Over 30% average savings were achieved by installing System 2000 to replace cast iron boilers rated at 85%-86% AFUE.
In this multi-year study, the U.S. Coast Guard in Kodiak, Alaska, replaced (24) new 85% and 86% AFUE cast iron boilers of various makes, indirect water heaters, and electric water heaters with System 2000 in residences.
The tremendous savings led to the 2007 replacement of another (149) cast iron boilers as part of a Super Energy Saving Performance Contract (Super ESPC) which is run by the Federal Energy Management Program (FEMP). This project capitalizes on the expertise and financing of the ESPC contractor to assist the Coast Guard in complying with the recent Executive Order which requires all Government agencies to reduce their energy use by 20% by 2015. The Coast Guard also realized operations and maintenance savings with System 2000 over the cast iron models. The FEMP takes advantage of real efficiency over AFUE, and you can too!
[ Read Looking Ahead in First Regional Super ESPC: Success on Kodiak Island, Alaska ]
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Brookhaven National Laboratory study uncovers a need to retool boiler energy efficiency rating programs.
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[ View Report ]
What are Department of Energy National Laboratories?
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Brookhaven National Laboratory study uncovers a need to retool boiler energy efficiency programs
AFUE (government efficiency) ratings can be off by 25% or more, an error that can underestimate fuel consumption by up to 47%.
The study shows that a consumer who purchases a home heating system based only on a comparison of AFUE ratings may actually spend as much as $800 per year more on fuel with one system, compared to a second system with a nearly identical AFUE rating. This difference in real annual efficiency is determined by a characteristic of all heating systems called idle loss, a performance factor which is not evaluated for AFUE on units which provide both heat and hot water. Idle loss includes two primary areas of heat loss on conventional home heating systems: standby loss, and jacket loss. Also almost entirely neglected are draft regulator, draft hood, and room air losses.
In the study, the reduction of idle losses is identified as a primary factor in improving real system efficiency.
Only when idle losses are reduced or eliminated is it possible for real efficiency to approach the AFUE rating of a heating product. In fact, significant idle losses may lead to actual efficiencies as low as 55%. This real annual efficiency rating may determine system performance even when the government AFUE rating measures in the 80-95 percentile range.
The study also reports that the cold start and cold finish operation of Energy Kinetics' System 2000 has the lowest overall idle loss and the best annual efficiency performance among all home heating systems tested to date, including 95% AFUE condensing gas and oil systems.
The study revealed that outdoor reset controls may save 5% to 15%, but need trial and error adjustments over the course of a heating season. By comparison, using proven Hybrid Energy Recovery,® System 2000 automatically adapts to heating loads. The result is a home heating system that delivers the best documented efficiency. View our efficiency checklist to see how your heating system idle loss compares.
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AFUE Readings Are Very Misleading |
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Article: AFUE ratings do more harm than good...
AFUE ratings don't help consumers make educated decisions about a boiler heating system's efficiency.
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Evaluate Your System's Idle Loss |
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How do low-efficiency boiler controls artificially boost AFUE ratings and undermine efficiency?
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Where Do Your Energy Dollars Go |
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Heat and hot water are the top energy users in a typical home.
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How much of your home’s energy is used for heat and hot water?
Find out more about conservation and about the impact of saving energy and about renewable energy.
[ View Sustainables ]
The chart at left is created from source data from the Energy Information Administration, Office of Energy Markets and End Use, Forms EIA-457 A-G of the 2001 Residential Energy Consumption Survey, New England and Mid-Atlantic states. Air conditioning percentage is an aggregate for the region and may not be representative of specific home usage.
1Data and conclusions are drawn from the report "Performance of Integrated Hydronic Heating Systems" (2007), Energy Resources Division, Department of Energy Sciences and Technology, Brookhaven National Laboratory, Under Contract No. DE-ACO2-98CH10886 with the United States Department of Energy by Dr. T. Butcher; and “Chimney Related Energy Losses in Residential Oil-Fired Heating Systems” (1990).
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