The BTO Emerging Technologies Accomplishments and Outcomes – 2015 page contains graphs on Multi-Year Program Plan R&D targets for certain technologies. This page contains information on data sources and methodology used to develop those graphs.
Figure 1 presents an illustration of the calculation of energy savings due to ET-commercialized technologies, relative to the 2010 ENERGY STAR® baseline applied to a given year. Important points:
- The energy consumption of the 2010 ENERGY STAR technologies is re-computed each subsequent year, and not held constant at the 2010 value.
- The energy savings due to ET-commercialized technologies are cumulative, such that technologies commercialized in prior years are applied to subsequent years.
For a Given Year y:
By = Energy savings for the 2010 ENERGY STAR technologies, relative to the AEO Reference Case for that year
Cy = Energy savings for the ET-commercialized technologies for that year and all prior years, relative to the AEO Reference Case for that year
Dy = Energy savings for the ET-commercialized technologies, relative to the 2010 ENERGY STAR technologies applied to that year
Consequently Dy = Cy – By.
The EUI is computed as follows:
The ratio EUIy/EUI2010 is then given by:
Many baseline cost and performance values (called out below as appropriate) are drawn from the EIA Annual Energy Outlook 2015 technology-specific cost and efficiency data source:
- Energy Information Administration (EIA). (2015). Updated Buildings Sector Appliance and Equipment Cost and Efficiencies. Available online: https://www.eia.gov/analysis/studies/buildings/equipcosts/pdf/full.pdf. Accessed 02/09/16.
All Federal Minimum Standard performance levels are drawn from the data listed for the appropriate technology type at the following source:
- U.S. Department of Energy (DOE), Office of Energy Efficiency and Renewable Energy. Standards and Test Procedures (EERE). Available online. Accessed 02/09/16.
All ENERGY STAR and ENERGY STAR Most Efficient performance levels are drawn from the data listed for the appropriate technology type at the following sources:
- ENERGY STAR. Certified Products. Available online: https://www.energystar.gov/products?s=mega. Accessed 02/09/16.
- ENERGY STAR. Recommended Levels of Insulation.
- ENERGY STAR. ENERGY STAR Most Efficient. Available online: https://www.energystar.gov/products/energy_star_most_efficient. Accessed 02/09/16.
Many cost data are drawn from the NREL Residential Efficiency Measures Database:
- National Renewable Energy Laboratory. National Residential Efficiency Measures Database.
All ET 2020 goal points are drawn from the 2016 Building Technologies Office Multi-Year Program Plan:
- U.S. Department of Energy. (2016). Building Technologies Office Multi-Year Program Plan. Available online. Accessed 02/09/16.
All ET R&D points are drawn from Building Technologies Office Statements of Work from project performers (documents not publicly available).
HVAC graph:
Fed. Min. Std.
- Cost: N/A
- Performance (Electric): U.S. DOE, Standards and Test Procedures, Residential Split-System Heat Pumps
- Performance (Gas): U.S. DOE, Standards and Test Procedures, Residential Furnaces
ENERGY STAR
- Cost (Electric): EIA, Appliance and Equipment Cost and Efficiencies, Residential Central Air Conditioners (South), ENERGY STAR
- Performance (Electric): ENERGY STAR, Certified Products, Residential Central Air Conditioners
- Cost (Gas): EIA, Appliance and Equipment Cost and Efficiencies, Residential Gas-Fired Furnaces, ENERGY STAR (North)
- Performance (Gas): ENERGY STAR, Certified Products, Residential Furnaces (North)
ENERGY STAR (Most Efficient)
- Cost (Electric): EIA, Appliance and Equipment Cost and Efficiencies, Residential Central Air Conditioners (South), High
- Performance (Electric): ENERGY STAR, Most Efficient 2016, Central Air Conditioners and Air Source Heat Pumps, 36 kBtu capacity (Best in database)
- Cost (Gas): EIA, Appliance and Equipment Cost and Efficiencies, Residential Gas-Fired Furnaces, High
- Performance (Gas): ENERGY STAR, Most Efficient 2016, Furnaces (Best in database)
Current Best
- Cost and performance (Advanced VC and Non-VC): EIA, Appliance and Equipment Cost and Efficiencies, Residential Central Air Conditioners (South), High
- Cost and performance (Natural Gas Heat Pump): EIA, Appliance and Equipment Cost and Efficiencies, Residential Gas-Fired Furnaces, High
- Cost and performance (Cold Climate Heat Pump): EIA, Appliance and Equipment Cost and Efficiencies, Residential Air-Source Heat Pumps, Heating Mode, High
Water Heating graph:
Fed. Min. Std.
- Cost: N/A
- Performance (Electric): U.S. DOE, Standards and Test Procedures, Electric Water Heater
- Performance (Gas): U.S. DOE, Standards and Test Procedures, Gas Water Heater
ENERGY STAR
- Cost (Electric): Based on Electrolux ENERGY STAR 66 Gallon Residential Electric Heat Pump Water Heater
- Cost (Gas): Based on Rheem Professional Classic 50 Gallon Natural Gas Residential Water Heater
- Performance (Electric): ENERGY STAR, Certified Products, High Efficiency Electric Storage Water Heaters
- Performance (Gas): ENERGY STAR, Certified Products, High Efficiency Gas Storage Water Heaters
Current Best
- Cost and performance (Non CO2 VC, CO2 VC, Non-VC): Based on Geo Spring 50 Gallon Hybrid Electric Heat Pump Water Heater and similar products
- Cost and performance (Gas Ab/Adsorption): EIA, Appliance and Equipment Cost and Efficiencies, Residential Gas-Fired Water Heaters, High (assumes 55 gallon First Hour Rating)
Appliances graph:
ENERGY STAR
- Cost (Refrigerators): Based on Frigidaire Gallery 22.6 cu. ft. Counter-Depth Side-By-Side Refrigerator
- Cost (Electric Dryers): Based on GE 7.4 cu. ft. ENERGY STAR electric dryer
- Cost (Gas Dryers): Based on GE 7.4 cu. ft. ENERGY STAR gas dryer
- Performance (Refrigerators): ENERGY STAR, Certified Products, Refrigerators
- Performance (Electric Dryers): ENERGY STAR, Certified Products, Ventless or Vented Electric, Standard
- Performance (Gas Dryers): ENERGY STAR, Certified Products, Vented Gas
ENERGY STAR (Most Efficient)
- Cost and performance (Refrigerators): ENERGY STAR, Most Efficient 2016, Medium, Large, and X-Large Refrigerators, Fisher & Paykel RF201A
Current Best
- Cost and performance (Refrigerators): Based on LG 23.9 cu. ft. 3 French Door ENERGY STAR Refrigerator and similar products
- Cost and performance (Dryers): Based on LG 7.3. cu. ft. Eco Hybrid Heat Pump Electric Dryer
Windows graph:
ENERGY STAR
- Cost: NREL Residential Efficiency Measures Database, Double-Pane, Medium-Gain Low-E, Insulated Frame, Argon Fill
- Performance (North): ENERGY STAR, Certified Products, Windows, Northern Climate Zone
- Performance (South): ENERGY STAR, Certified Products, Windows, Southern Climate Zone
ENERGY STAR (Most Efficient)
- Cost: NREL Residential Efficiency Measures Database, Triple-Pane, Low-Gain Low-E, Insulated Frame, Argon Fill
- Performance: ENERGY STAR, Most Efficient 2016, Windows, Casement Style (Best in database)
Current Best
- Cost and performance (residential): NREL Residential Efficiency Measures Database, Triple-Pane, Low-Gain Low-E, Insulated Frame, Argon Fill
- Cost (commercial): Based on BTO expert elicitation (cost data unavailable from commercial product literature)
- Performance (commercial): Based on Kawneer OptiQ Ultrathermal Window
Other
- Cost (R- 5.6): NREL Residential Efficiency Measures Database, Triple-Pane, High-Gain Low-E, Insulated Frame, Argon Fill
- Cost (R-5.2): NREL Residential Efficiency Measures Database, Triple-Pane, Low-Gain Low-E, Insulated Frame, Air Fill
Envelope graph:
ENERGY STAR
- Cost: NREL Efficiency Measures Database, Wall Sheathing, Average of R-5 XPS and R-6 Polyiso
- Performance: ENERGY STAR, Recommended Levels of Insulation, Insulated Wood Frame Wall
Current Best
- Cost and performance: NREL Efficiency Measures Database, Wall Sheathing, R-6 Polyiso