Calc_Furnaces by fanzhongqing

VIEWS: 5 PAGES: 10

									                                                       Life Cycle Cost Estimate for
                                             an ENERGY STAR Qualified Gas Residential Furnace

This energy savings calculator was developed by the U.S. EPA and U.S. DOE and is provided for estimating purposes only. Actual energy savings may vary
based on use and other factors.


                                                         NOTE: This calculator is in the process of being updated
                                                         for the revised ENERGY STAR furnace specification that
                                                               went into effect on February 1, 2012. For more
                                                                 information on the new specification, visit
                                                  http://www.energystar.gov/index.cfm?c=furnaces.pr_crit_furnaces


                                          Enter your own values in the gray boxes or use our default values.
                                                                 Gas
What fuel do you use to heat your home?
Gas Rate ($/therm)                                                              $1.05
                                                                 WASHINGTON, DC
What Census region do you live in?
How large is your home? (in square feet)                                        2,500                    Include only heated space
When was your home built?                                       2000-Present

                                                                New Unit
When was your existing furnace installed?                                                                Select 'New Unit' to compare new furnace options



                                                             New ENERGY STAR
                                                               Qualified Unit                         New Conventional Unit

Uninstalled Cost per Unit (estimated retail price)                             $1,400                                  $1,100
Annual Fuel Utilization Efficiency (AFUE)                                        90%                                      78%
Use with programmable Thermostat (Yes/No)                        Yes                                     Yes          Thermostat Usage Guidelines
                                                                 You have selected the programmable thermostat option, your savings are
                                                                 calculated based on ENERGY STAR suggested thermostat usage shown in
                                                                 the link above, your actual savings may vary.



                                               Annual and Life Cycle Costs and Savings for a Gas Furnace
                                                          ENERGY STAR Qualified                                                                  Savings with ENERGY
                                                                  Unit                                    Conventional Unit                             STAR
                                *
Annual Operating Costs
Energy cost                                                                     $497                                      $573                                         $76
        Energy Consumption (MMBTU)                                             47                                       55                                            7
        Energy Consumption (Therms)                                            473                                     546                                           73
Maintenance cost                                                                  $0                                        $0                                          $0
Total                                                                           $497                                      $573                                         $76

                      *
Life Cycle Costs
Operating costs (energy and maintenance)                                       $6,287                                  $7,255                                         $967
   Energy costs                                                                $6,287                                  $7,255                                         $967
        Energy Consumption (MMBTU)                                             851                                     982                                         131
        Energy Consumption (Therms)                                        8,514                                     9,824                                       1,310
   Maintenance costs                                                                 $0                                      $0                                           $0
Purchase price                                                                 $1,400                                  $1,100                                        -$300
Total                                                                          $7,687                                  $8,355                                         $667

                                                                                                        Simple payback of initial additional cost (years)†              3.9
* Annual costs exclude the initial purchase price. All costs, except initial cost, are discounted over the products' lifetime using a real discount rate of 4%. See "Assumptions" to
change factors including the discount rate.
†
  A simple payback period of zero years means that the payback is immediate.



                                                             Summary of Benefits for a Gas Furnace
Initial cost difference                                                                                                                                              $300
Life cycle savings                                                                                                                                                   $967
Net life cycle savings (life cycle savings - additional cost)                                                                                                        $667
Simple payback of additional cost (years)                                                                                                                             3.9
Life cycle energy saved (MMBtu)                                                                                                                                       131
Life cycle air pollution reduction (lbs of CO2)                                                                                                                    15,325
Air pollution reduction equivalence (number of cars removed from the road for a year)                                                                                   1
Air pollution reduction equivalence (acres of forest)                                                                                                                   1
Savings as a percent of retail price                                                                                                                                 48%
                                                                Assumptions for Furnace

Category                                                                Value                Data Source
Power
ENERGY STAR Qualified Unit
  Uninstalled Cost                                                $1,400                     See Table7
  Annual Fuel Utilization Efficiency (AFUE) for Gas                 90%                      ENERGY STAR Specification
  Annual Fuel Utilization Efficiency (AFUE) for Oil                 85%                      ENERGY STAR Specification
  Lifetime (Gas)                                                      18 years               LBNL 2008
  Lifetime (Oil)                                                      17 years               LBNL 2008
  Lifetime of Selected Unit                                           18 years               Selection

Conventional Unit
  Uninstalled Cost                                                $1,100                     See Table 7
  Annual Fuel Utilization Efficiency (AFUE)                         78%                      See Table 1 (Cell K16)
  Lifetime (Gas)                                                      18 years               LBNL 2008
  Lifetime (Oil)                                                      17 years               LBNL 2008
  Lifetime of Selected Unit                                           18 years               Selection

Maintenance
  Labor cost (per hour)                                               $0                     If labor costs associated, please enter values here
  Labor time (hours)                                                   0                     If labor costs associated, please enter values here

Conditioned Area                                                   2,500 square feet         http://www.census.gov/const/C25Ann/sftotalmedavgsqft.pdf

Residential Space Heating Load
Selected City Heat Load by Construction Age (kBTU/SF/YR)      19.80                          Calculated
                                                                            Savings Due to
Ratio of Heating Degree Days to Regional Average           % of Regional    Programmable
Heating Degree Day                                             Load          Thermostat      NOAA, 2007**
ANCHORAGE, AK                                                         2.4                    Calculated
JUNEAU, AK                                                            2.0                    Calculated
BIRMINGHAM, AL                                                        0.8                    Calculated
HUNTSVILLE, AL                                                        0.9                    Calculated
MOBILE, AL                                                            0.5                    Calculated
FORT SMITH, AR                                                        1.5                    Calculated

LITTLE ROCK, AR                                                       1.4                    Calculated
NORTH LITTLE ROCK, AR                                                 1.3                    Calculated
FLAGSTAFF, AZ                                                         1.3                    Calculated
PHOENIX, AZ                                                           0.2                    Calculated
TUCSON, AZ                                                            0.3                    Calculated
WINSLOW, AZ                                                           0.8                    Calculated
YUMA, AZ                                                              0.1                    Calculated
BAKERSFIELD, CA                                                       0.5                    Calculated
BISHOP, CA                                                            1.0                    Calculated
FRESNO, CA                                                            0.6                    Calculated
LONG BEACH, CA                                                        0.3                    Calculated
LOS ANGELES C.O., CA                                                  0.2                    Calculated
MOUNT SHASTA, CA                                                      1.4                    Calculated
SACRAMENTO, CA                                                        0.6                    Calculated
SAN DIEGO, CA                                                         0.2                    Calculated
SAN FRANCISCO C.O., CA                                                0.6                    Calculated
SANTA BARBARA, CA                                                     0.5                    Calculated
SANTA MARIA, CA                                                       0.6                    Calculated
STOCKTON, CA                                                          0.6                    Calculated
EUREKA, CA.                                                           1.0                    Calculated
ALAMOSA, CO                                                           1.6                    Calculated
COLORADO SPRINGS, CO                                                  1.1                    Calculated
DENVER, CO                                                            1.1                    Calculated
GRAND JUNCTION, CO                                                    1.0                    Calculated
PUEBLO, CO                                                            1.0                    Calculated
BRIDGEPORT, CT                                                        0.8                    Calculated
HARTFORD, CT                                                          0.9                    Calculated
WASHINGTON, DC                                                        1.1                    Calculated
WILMINGTON, DE                                                        1.3                    Calculated
MIAMI, FL                                                             0.0                    Calculated
ORLANDO, FL                                                           0.2                    Calculated
TALLAHASSEE, FL                                                       0.4                    Calculated
ATLANTA, GA                                                           0.8                    Calculated
AUGUSTA, GA                                                           0.7                    Calculated
HONOLULU, HI                                                          0.0                    Calculated
DES MOINES, IA                                                        1.0                    Calculated
SIOUX CITY, IA                                                        1.0                    Calculated
BOISE, ID                                                             1.0                    Calculated
LEWISTON, ID                                                          0.9                    Calculated
CHICAGO, IL                                                           1.0                    Calculated
MOLINE, IL                                                            1.0                    Calculated
PEORIA, IL                                                            1.0                    Calculated
SPRINGFIELD, IL                                                       0.9                    Calculated
EVANSVILLE, IN                                                        0.7                    Calculated
FORT WAYNE, IN                                                        1.0                    Calculated
INDIANAPOLIS, IN                                                      0.9                    Calculated
SOUTH BEND, IN                                                        1.0                    Calculated
CONCORDIA, KS                                                         0.8                    Calculated
DODGE CITY, KS                                                        0.8                    Calculated
GOODLAND, KS                                                          0.9                    Calculated
TOPEKA, KS                                                            0.8                    Calculated
WICHITA, KS                                                           0.7                    Calculated
JACKSON, KY                                                           1.3                    Calculated
LEXINGTON, KY                                                         1.4                    Calculated
LOUISVILLE, KY                                                        1.3                    Calculated
                                Assumptions for Furnace

Category                              Value          Data Source
PADUCAH, KY                         1.2              Calculated
BATON ROUGE, LA                     0.7              Calculated
LAKE CHARLES, LA                    0.7              Calculated
NEW ORLEANS, LA                     0.6              Calculated
SHREVEPORT, LA                      1.0              Calculated
BOSTON, MA                          0.9              Calculated
WORCESTER, MA                       1.0              Calculated
BALTIMORE, MD                       1.3              Calculated
PORTLAND, ME                        1.1              Calculated
DETROIT, MI                         1.0              Calculated
FLINT, MI                           1.1              Calculated
GRAND RAPIDS, MI                    1.1              Calculated
LANSING, MI                         1.1              Calculated
DULUTH, MN                          1.5              Calculated
MINNEAPOLIS-ST.PAUL, MN             1.2              Calculated
SAINT CLOUD, MN                     1.3              Calculated
COLUMBIA, MO                        0.8              Calculated
KANSAS CITY, MO                     0.8              Calculated
SPRINGFIELD, MO                     0.7              Calculated
ST. LOUIS, MO                       0.7              Calculated
JACKSON, MS                         0.7              Calculated
MERIDIAN, MS                        0.7              Calculated
BILLINGS, MT                        1.3              Calculated
GREAT FALLS, MT                     1.4              Calculated
HELENA, MT                          1.4              Calculated
MISSOULA, MT                        1.4              Calculated
ASHEVILLE, NC                       1.1              Calculated
CHARLOTTE, NC                       0.9              Calculated
RALEIGH, NC                         0.9              Calculated
BISMARCK, ND                        1.3              Calculated
FARGO, ND                           1.4              Calculated
GRAND ISLAND, NE                    1.0              Calculated
LINCOLN, NE                         0.9              Calculated
OMAHA (NORTH), NE                   0.9              Calculated
SCOTTSBLUFF, NE                     1.0              Calculated
CONCORD, NH                         1.1              Calculated
ATLANTIC CITY C.O., NJ              1.2              Calculated
NEWARK, NJ                          1.3              Calculated
ALBUQUERQUE, NM                     0.8              Calculated
CLAYTON, NM                         0.9              Calculated
ROSWELL, NM                         0.6              Calculated
LAS VEGAS, NV                       0.4              Calculated
RENO, NV                            1.0              Calculated
WINNEMUCCA, NV                      1.1              Calculated
ALBANY, NY                          1.1              Calculated
BINGHAMTON, NY                      1.2              Calculated
BUFFALO, NY                         1.1              Calculated
ISLIP, NY                           0.9              Calculated
NEW YORK (JFK AIRPORT), NY          0.8              Calculated
SYRACUSE, NY                        1.1              Calculated
AKRON, OH                           1.0              Calculated
CINCINNATI, OH                      0.8              Calculated
CLEVELAND, OH                       1.0              Calculated
COLUMBUS, OH                        0.9              Calculated
DAYTON, OH                          0.9              Calculated
MANSFIELD, OH                       1.0              Calculated
TOLEDO, OH                          1.0              Calculated
YOUNGSTOWN, OH                      1.0              Calculated
OKLAHOMA CITY, OK                   1.6              Calculated
TULSA, OK                           1.6              Calculated
ASTORIA, OR                         1.2              Calculated
BURNS, OR                           1.8              Calculated
EUGENE, OR                          1.1              Calculated
MEDFORD, OR                         1.0              Calculated
PENDLETON, OR                       1.2              Calculated
PORTLAND, OR                        1.0              Calculated
SALEM, OR                           1.1              Calculated
SEXTON SUMMIT, OR                   1.4              Calculated
ALLENTOWN, PA                       0.9              Calculated
HARRISBURG, PA                      0.9              Calculated
PHILADELPHIA, PA                    0.8              Calculated
PITTSBURGH, PA                      1.0              Calculated
WILLIAMSPORT, PA                    1.0              Calculated
ERIE, PA.                           1.1              Calculated
PROVIDENCE, RI                      0.9              Calculated
COLUMBIA, SC                        0.7              Calculated
HURON, SD                           1.2              Calculated
RAPID CITY, SD                      1.1              Calculated
SIOUX FALLS, SD                     1.2              Calculated
BRISTOL-JHNSN CTY-KNGSPRT, TN       1.3              Calculated
CHATTANOOGA, TN                     1.0              Calculated
KNOXVILLE, TN                       1.1              Calculated
MEMPHIS, TN                         0.9              Calculated
NASHVILLE, TN                       1.1              Calculated
ABILENE, TX                         1.2              Calculated
AMARILLO, TX                        1.9              Calculated
AUSTIN/BERGSTROM, TX                0.8              Calculated
AUSTIN/CITY, TX                     0.7              Calculated
BROWNSVILLE, TX                     0.3              Calculated
                                                                           Assumptions for Furnace

Category                                                                           Value            Data Source
CORPUS CHRISTI, TX                                                               0.4                Calculated
DALLAS-FORT WORTH, TX                                                            1.1                Calculated
DALLAS-LOVE FIELD, TX                                                            1.0                Calculated
DEL RIO, TX                                                                      0.6                Calculated
EL PASO, TX                                                                      1.2                Calculated
GALVESTON, TX                                                                    0.5                Calculated
HOUSTON, TX                                                                      0.7                Calculated
LUBBOCK, TX                                                                      1.5                Calculated
MIDLAND-ODESSA, TX                                                               1.2                Calculated
PORT ARTHUR, TX                                                                  0.6                Calculated
SAN ANGELO, TX                                                                   1.1                Calculated
SAN ANTONIO, TX                                                                  0.7                Calculated
VICTORIA, TX                                                                     0.6                Calculated
WACO, TX                                                                         1.0                Calculated
WICHITA FALLS, TX                                                                1.4                Calculated
MILFORD, UT                                                                      1.1                Calculated
SALT LAKE CITY, UT                                                               1.0                Calculated
LYNCHBURG, VA                                                                    1.2                Calculated
NORFOLK, VA                                                                      0.9                Calculated
RICHMOND, VA                                                                     1.1                Calculated
ROANOKE, VA                                                                      1.2                Calculated
BURLINGTON, VT                                                                   1.2                Calculated
OLYMPIA, WA                                                                      1.3                Calculated
QUILLAYUTE, WA                                                                   1.3                Calculated
SEATTLE, WA                                                                      1.1                Calculated
SPOKANE, WA                                                                      1.6                Calculated
WALLA WALLA, WA                                                                  1.1                Calculated
YAKIMA, WA                                                                       1.4                Calculated
GREEN BAY, WI                                                                    1.3                Calculated
MADISON, WI                                                                      1.2                Calculated
MILWAUKEE, WI                                                                    1.1                Calculated
BECKLEY, WV                                                                      1.5                Calculated
CHARLESTON, WV                                                                   1.3                Calculated
ELKINS, WV                                                                       1.7                Calculated
HUNTINGTON, WV                                                                   1.3                Calculated
CHEYENNE, WY                                                                     1.3                Calculated
LANDER, WY                                                                       1.4                Calculated
SHERIDAN, WY                                                                     1.4                Calculated

Programmable Thermostat Savings
  Average Heating Savings in the Selected City                               14.0%                  RLW Analytics ***

Discount Rate
  Commercial and Residential Discount Rate (real)                                4%                 A real discount rate of 4 percent is assumed, which is roughly equivalent to the
                                                                                                    nominal discount rate of 7 percent (4 percent real discount rate + 3 percent
                                                                                                    inflation rate).

Energy Conversions
                                                                                                    EIA: www.eia.doe.gov/emeu/mer/pdf/pages/sec12_1.pdf : 5.825 million BTUS
  Btus per Gallon of #2 oil                                                 138,690 Btu/gal         per barrel
  Btu per Therm of Gas                                                      100,000 Btu/Therm

Energy Prices
  Residential Distillate Fuel Oil Price                                      $21.87   /MMBtu        US Department of Energy, Annual Energy Outlook 2011 (Early Release),
  Commericial Distillate Fuel Oil Price                                      $19.25   /MMBtu        (converted from 2009 to 2010 dollars), http://www.eia.gov/forecasts/aeo/er/
  Residential Price of # 2 Oil                                                $3.03   /gallon       Calculated
  Commercial Price of # 2 Oil                                                 $2.67   /gallon       Calculated
  Residential Gas Price                                                       $1.05   /therm        US Department of Energy, Annual Energy Outlook 2011 (Early Release),
  Commercial Gas Price                                                        $0.93   /therm        (converted from 2009 to 2010 dollars), http://www.eia.gov/forecasts/aeo/er/


Carbon Dioxide Emissions Factors
  Oil CO2 Emission Factor                                                    161.27 lbs CO2/MMBtu   EPA 2009
  Gas CO2 Factor                                                               117 lbs CO2/MMBtu    EPA 2011

Carbon Dioxide Equivalents
  Annual CO2 sequestration per forested acre                                 10,347 lbs CO2/yr      EPA’s Greenhouse Gas Equivalencies Calculator,
  Annual CO2 emissions per average passenger car                             11,244 lbs CO2/yr      http://www.epa.gov/cleanenergy/energy-resources/calculator.html

If you have questions, comments or suggestions, please write to calculators@energystar.gov
Calculator last updated July 2009, utility and emission rates updated July 2011



*http://www.resnet.us/standards/mortgage/RESNET_Mortgage_Industry_National_HERS_Standards.pdf ; Table Table 303.7.1(3) Default Values for Mechanical System Efficiency (Age-
**http://ggweather.com/ccd/nrmhdd.htm % Calculated as = (NOAA 2001 HDD)/(average NOAA HDD for region) regions are based on REC census regionsSystem Efficiency (Age-based)
*** "Validating the impact of programmable thermostats final report", RLW, Jan. 2007
    Table 1-Vintage Furnace Efficiency. ) RESNET Mortgage Industry National HERS Standards
                             1            2          1
                      Gas       Oil         Selected
1   <1960                 60%        60%         60%
2   1960-1969             60%        65%         60%
3   1970-1974             65%        72%         65%
4   1975-1983             68%        75%         68%
5   1984-1987             68%        80%         68%
6   1988-1991             76%        80%         76%
7   >1992                 78%        80%         78%
8   New Unit              78%        80%         78%
8   Selected Value                               78%

    Table 2-Historical Heat Loads by Construction Age and Region (kBTU/SF/YR) Based on Analysis of Residential Energy Consumption Survey Data (See FINAL Boiler RECS Analys
    Construction Date Region
    Region                    1         2           3          4               5            6         7             8               9          3
    Age                         Mid                   E
                       New England AtlanticSouth AtlanticS CentralE N Central    W N Central W S Central Mountain     Pacific         South Atlantic
1   <1940                    50        49         45          34              62          47        49             55              29      45.0
2   1940-1949                46        45         41          33              56          44        43             50              27      41.0
3   1950-1959                43        41         37          33              51          41        37             45              26      37.0
4   1960-1969                40        38         32          32              45          38        31             40              25      32.0
5   1970-1979                37        34         28          31              39          35        24             36              24      28.0
6   1980-1989                34        30         24          30              34          32        18             31              22      24.0


7 1990-1999                  31         26         20         29           28         29         12                26                 21   20.0
8 2000-Present               29         24         18         28           24         27          9                23                 20   18.0
8 Selected Value                                                                                                                           18.0



    Table 3-Census Division Lookup Table

1   New England
2   Middle Atlantic
3   South Atlantic
4   East South Central
5   East North Central
6   West North Central
7   West South Central
8   Mountain
9   Pacific
3   Selected


  Table 4-Fuel Type Selected
1 Gas               Energy Consumption (Therms)
2 Oil               Energy Consumption (Gallons)

1 Selected


    Table 5-Programmable Thermostat Usage
1   Yes             ENERGY STAR Case
2   No
1   Selected Value
1   Yes             Standard Case
2   No
1   Selected Value

    Table 6 - ENERGY STAR Specification
                 90%   Annual Fuel Utilization Efficiency (AFUE) for Gas
                 85%   Annual Fuel Utilization Efficiency (AFUE) for Oil
                 90% Selected



    Table 7 - Uninstalled Prices of Different Types of Furnaces (Source: 2008 Furnace Price Report on Page 4 at www.furnacecompare.com)
                       Oil        Gas        Selected
    Conventional Unit      $1,700    $1,100     $1,100
    ES Unit                $2,300    $1,400     $1,400
) Based on Analysis of Residential Energy Consumption Survey Data (See FINAL Boiler RECS Analysis - Dec2007.xls

								
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