### APPENDIX 7-A. RECS 2005 VARIABLES AND VALUES

TABLE OF CONTENTS

7-A.1 INTRODUCTION ................................................................................................. 7-A-1 7-A.2 SAMPLE DETERMINATION.............................................................................. 7-A-1 7-A.2.1 Water Heaters......................................................................................................... 7-A-1 7-A.2.2 Direct Heating Equipment ..................................................................................... 7-A-3 7-A.2.3 Pool Heaters ........................................................................................................... 7-A-6 7-A.3 RECS 2005 DATABASE VARIABLE RESPONSE CODES.............................. 7-A-7

LIST OF TABLES

Table 7-A.2.1 Selection of RECS 2005 Records by Fuel Type: Water Heaters...............7-A-1 Table 7-A.2.2 List of RECS 2005 Variables Used for Water Heaters..............................7-A-2 Table 7-A.2.3 Summary of Direct Heating Equipment Household Sample (RECS 2005) ..........................................................................................................7-A-4 Table 7-A.2.4 List of RECS 2005 Variables Used in Direct Heating Equipment ............7-A-5 Table 7-A.2.5 Criteria for Selection of Pool Heaters Household Sample (RECS 1993­ 2005) ..........................................................................................................7-A-6 Table 7-A.2.6 List of RECS 2005 Variables Used for Pool Heaters ................................7-A-6 Table 7-A.3.1 Definitions of RECS 2005 Variables Used in Life-Cycle Cost Analysis..7-A-7

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### APPENDIX 7-A. RECS 2005 VARIABLES AND VALUES

7-A.1 INTRODUCTION

Using Microsoft ACCESS, DOE created a database containing a subset of the records and variables from DOE’s Energy Information Administration (EIA)’s RECS 2005. 1 

### DOE used this RECS subset in the life-cycle cost (LCC) analysis of the Residential Water Heaters, Direct Heating Equipment, and Pool Heaters Rulemaking. This appendix explains the variable name abbreviations and provides definitions of the variable values. For the entire RECS 2005 dataset, refer to http://www.eia.doe.gov/emeu/recs/recspubuse05/pubuse05.html.

7-A.2 SAMPLE DETERMINATION

7-A.2.1 Water Heaters

The subset of RECS records used for water heaters met all of the following criteria:

1) Used a water heater as the primary source of heated water, 2) Used one of four fuels (electricity, gas, LPG, or oil as a heating fuel), 3) Provided heated water for only one housing unit, 4) Had an indication of water heater size, including instantaneous for natural gas and LPG, 5) Had energy consumption greater than zero.

The RECS 2005 variables used to match the selection criteria are listed in Table 7-A.2.1.

Table 7-A.2.1 Selection of RECS 2005 Records by Fuel Type: Water Heaters

Product Class Algorithm # of Records # of US Households Represented (million)

Natural Gas or LPG (Storage) FUELH2O = 1 or 2 WHEATOTH = 0 WHEATSIZ = 1 or 2 or 3 2166 55.2

Electricity (Storage) FUELH2O = 5
WHEATOTH = 0 WHEATSIZ = 1 or 2 or 3 1523 39.5

Fuel Oil (Storage) FUELH2O = 3 WHEATOTH = 0 WHEATSIZ = 1 or 2 or 3 100 1.8

Natural Gas or LPG (Instantaneous) FUELH2O = 1 or 2 WHEATOTH = 0 WHEATSIZ = 1 or 2 or 3 or 6 2180 55.5

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### Table 7-A.2.2 List of RECS 2005 Variables Used for Water Heaters

Variable Description

Location Variables

REGIONC Census region

DIVISION Census division

LRGSTATE Large state designation

LRG+DIV* Combined large state (LRGSTATE) and census division (DIVISION)

CD65 Cooling degree-days to base 65, 1-04 TO 12-04

HD65 Heating degree-days to base 65, 1-04 TO 12-04

Household Characteristics Variables

DOEID DOE 4-digit identification number

NWEIGHT Final weight
TYPEHUQ Type of housing unit as report by respondent

YEARMADE Year residence built

NCOMBATH Number of full bathrooms

FUELH2O Fuel used most to heat water for washing or bathing

WHEATOTH Does the main water heating equipment also heat water for other residences?

WHEATSIZ Approximate size of household's main water heater tank

WHEATAGE Approximate age of household’s main water heater

NHSLDMEM Number of household members

PRESCHOOLCHILDREN* Number of household members between the ages of 0 and 5

SCHOOLCHILDREN* Number of household members between the ages of 6 and 13

ADULTS* Number of household members between the ages of 14 and 64

SENIORS* Number of household members between the ages of 65 and 95

ATHOME Is there a household member at home all day on a typical weekday?

POOR100 Household is below 100 percent of poverty

DISHWASH Automatic dishwasher used in the home?

CWASHER Clothes washer used in the home?

7-A-2PGASHTWA How is natural gas for water heating paid for?

LPGPAY How is bottled gas paid for?

PELHOTWA How is electricity for water heating paid for?

FOPAY How if fuel oil paid for?

CELLAR Home has a basement

BASEHEAT Basement heated during winter months

BASECOOL Basement air conditioned during summer months

PRKGPLC1 Home has an attached garage

CRAWL Home has a crawl space

WELLPUMP Electric pump for well water?

WEATHERLOCATIONCODE* Not part of RECS, added to link to weather data (See App. 7-D)

TEMPHOME Winter household temperature during the day when someone is home

TEMPGONE Winter household temperature during the day when no one is home

TEMPNITE Winter household temperature during sleeping hours

* Not part of RECS 2005 variables.


### 7-A.2.2 Direct Heating Equipment

The subset of RECS households used for direct heating equipment met all of the following criteria:

1) Used wall fan, wall gravity or floor furnace, fireplace or room heater as the primary or secondary source of heat, 2) Used natural gas or liquefied petroleum gas (LPG) as home heating fuel, 3) Heated only one housing unit, 4) Had energy consumption greater than zero.

The RECS 2005 variables used to match the selection criteria are listed in Table 7-A.2.3.

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### Table 7-A.2.3 Summary of Direct Heating Equipment Household Sample (RECS 2005)

Category Selection Criteria Fuel Type # of Records # of US Households Represented (million)
Primary Equipment

Floor Furnace EQUIPM = 6 FUELHEAT = 1 or 2 HEATOTH = 0 FUELUSE > 0 Natural Gas 88 2.1

LPG 7 0.2

Wall Fan/Gravity EQUIPM = 6 FUELHEAT = 1 or 2 HEATOTH = 0 FUELUSE > 0 Natural Gas 88 2.1

LPG 7 0.2

Room Heater* EQUIPM = 7 FUELHEAT = 1 or 2 HEATOTH = 0 FUELUSE > 0 Natural Gas 77 1.8

LPG 35 0.9

Fireplace** EQUIPM = 9 FUELHEAT = 1 or 2 HEATOTH = 0 FUELUSE > 0 Natural Gas 4 0.1

LPG 6 0.2

Secondary Equipment

Wall Fan/Gravity PIPELESS = 1 PIPEFUEL = 1 or 2 FUELUSE > 0 Natural Gas 3 0.1

LPG 3 0.1

Room Heater* ROOMHEAT = 1 RMHTFUEL = 1 or 2 FUELUSE > 0 Natural Gas 21 0.5

LPG 23 0.6 Fireplace CHIMNEY = 1 FPFUEL = 1 or 2 NGFPFLUE = 1 or 9 FUELUSE > 0 Natural Gas 93 2.3

LPG 18 0.5

* Includes three households which have both primary and secondary room heaters. For simplicity only the main heater is used in this analysis. **All households with the exception of two have thermostats.

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### Table 7-A.2.4 List of RECS 2005 Variables Used in Direct Heating Equipment

Variable Description

Location Variables

REGIONC Census region

DIVISION Census division

LRGSTATE Large state designation

LRG+DIV* Combined large state (LRGSTATE) and census division (DIVISION)

CD65 Cooling degree-days to base 65, 1-04 TO 12-04

HD65 Heating degree-days to base 65, 1-04 TO 12-04

Household Characteristics Variables

DOEID DOE 4-digit identification number

NWEIGHT 

### Final weight

YEARMADE Year residence built

EQUIPAGE Approximate age of household’s main heating system
EQUIPM Primary heating equipment

SENIORS Number of household members between the ages of 65 and 95

NHSLDMEM Number of household members

FUELUSE* Primary or secondary DHE energy consumption

FUEL TYPE* Primary or secondary DHE fuel type
SECONDARY EQP TYPE* Is household DHE primary or secondary heating equipment?

ADJUSTMENT NEEDED?* Energy adjustment required for household with secondary DHE?

EQMAMT Amount of heat main heating equipment provides

HEATOTH Does the main space heating equipment also heat other residences?

NGFPFLUE Does the fireplace have a flue?

FPFUEL Fireplace fuel

ROOMHEAT Room heater used as secondary heating equipment

RMHTFUEL Room heater fuel

PIPELESS Pipeless furnace used as secondary heating equipment

PIPEFUEL Pipeless furnace fuel

7-A-5POOR100 Household is below 100 percent of poverty

CHIMNEY Fireplace used as secondary heating equipment

FUELHEAT Main fuel used for home heating

* Not part of RECS 2005 variables.



### 7-A.2.3 Pool Heaters

The subset of records used to select a RECS household sample specific for pool heaters met all of the following criteria:

1. Has a swimming pool, 2. Used a pool heater, 3. Used natural gas or liquefied petroleum gas (LPG) for pool heating, 4. Heater provided heated pool water for only one housing unit.

1, 2, 3, 4 

### The RECS 1993-2005 variables used to match the selection criteria are listed in Table 7-A.2.5.

Table 7-A.2.5	 Criteria for Selection of Pool Heaters Household Sample (RECS 1993­ 2005) By Fuel

Type Selection Criteria # of Records # of US Households Represented (million)

Natural Gas or LPG FUELPOOL = 1 or 2 ADJUSTED FUEL USE > 0 170 1.5



### All RECS 2005 variables extracted for pool heaters are listed in Table 7-A.2.6.

Table 7-A.2.6	 List of RECS 2005 Variables Used for Pool Heaters

Variable Description

Location Variables

REGIONC Census region

DIVISION Census division

LRGSTATE Large state designation

LRG+DIV* Combined large state (LRGSTATE) and census division (DIVISION)

CD65 Cooling degree-days to base 65, 1-04 TO 12-04

HD65 Heating degree-days to base 65, 1-04 TO 12-04

Household Characteristics Variables

DOEID DOE 4-digit identification number

7-A-6NWEIGHT Final weight

TYPEHUQ Type of housing unit as report by respondent

YEARMADE Year residence built

SWIMPOOL Does residence have a swimming pool with filtering system?

POOL Is the pool heated?

FUELPOOL Pool heater fuel

RECBATH Does the home have a heated hot tub or spa?

FUELTUB Hot tub/spa fuel

DRYRFUEL Clothes dryer fuel

FUELFOOD Primary cooking fuel

OTHER APPLIANCE TYPE* Assigns whether a household has either gas cooking or gas clothes dryer appliances

BTUNGAPL Natural gas usage for appliances

BTULPAPL LPG usage for appliances

AVG. DRYER-COOKING USE Assigns average gas cooking and/or dryer consumption

ADJUSTED FUEL USE Calculated Pool Heater energy use

* Not part of RECS 1993-2005 variables.



### 7-A.3 RECS 2005 DATABASE VARIABLE RESPONSE CODES

Table 7-A.3.1 provides the response codes for all RECS 2005 variables used in the Heating Products samples.

Table 7-A.3.1 Definitions of RECS 2005 Variables Used in Life-Cycle Cost Analysis

Variable Definition Common Variables REGIONC Census region 1 = Northeast 2 = Midwest 3 = South 4 = West

7-A-7DIVISION Census division 1 = New England 2 = Middle Atlantic 3 = East North Central 4 = West North Central 5 = South Atlantic 6 = East South Central 7 = West South Central 8 = Mountain 9 = Pacific LRGSTATE Large state designation 0 = Other 1 = New York 2 = California 3 = Texas 4 = Florida LRG+DIV* Combined large state (LRGSTATE) and census division (DIVISION) 1 = New England 2 = Middle Atlantic (not including New York) 3 = East North Central 4 = West North Central 5 = South Atlantic (not including Florida) 6 = East South Central 7 = West South Central (not including Texas) 8 = Mountain 9 = Pacific (not including California) 10 = New York 11 = California 13 = Texas 14 = Florida CD65 Cooling degree-days to base 65, 1-04 TO 12-04 HD65 Heating degree-days to base 65, 1-04 TO 12-04 DOEID DOE 4-digit identification number TYPEHUQ Respondents reported type of home 1 = Mobile Home 2 = Single-family detached 3 = Single-family attached 4 = Apartment building with 2-4 units 5 = Apartment building with 5 or more units

7-A-8YEARMADE Year home built 1 = Before 1940 2 = 1940-49 3 = 1950-59 4 = 1960-69 5 = 1970-79 6 = 1980-84 7 = 1985-89 8 = 1990-94 9 = 1995-99 10 = 2000-2002 11 = 2003 12 = 2004 13 = 2005 NWEIGHT Final weight Sample Variables (Alphabetical) ADJUSTMENTNEEDED* Adjustment for secondary heating equipment? 1 = Yes 0 = No ADULTS* Number of household members between the ages of 14 and 64 ATHOME Is there a household member at home all day on a typical weekday? 1 = Yes 0 = No AVG DRYER – COOKING USE Subtracts cooking use to get accurate dryer energy use. BASECOOL Basement air conditioned during summer months 1 = Yes 0 = No 9 = Skip BASEHEAT Basement/crawl Space heated 1 = All 2 = Part 0 = None 9 = Skip BTULPAPL LPG appliance use estimated (thousands of BTU) 9999999=Not Applicable BTULPSPH LPG space heating use estimated (thousands of BTU) 9999999=Not Applicable BTUNGAPL Natural appliance use estimated (thousands of BTU) 9999999=Not Applicable BTUNGSPH Natural gas space heating use estimated (thousands of BTU) 9999999=Not Applicable CELLAR Home has a basement 1 = Yes 0 = No 9 = Skip CHIMNEY Fireplace used as secondary heating equipment 1 = Yes 0 = No 9 = Skip

7-A-9CRAWL Home has a crawl space 1 = Yes 0 = No 9 = Skip CWASHER Use a clothes washer in home? 1 = Yes 0 = No DISHWASH Use an automatic dishwasher in home? 1 = Yes 0 = No DRYRFUEL Clothes dryer fuel 1 = Natural gas from underground pipes 2 = Bottled Gas (LPG or Propane) 5 = Electricity 99 = No Answer/Not Applicable EQMAMT How much heat main heating equipment provides 1 = Almost all 2 = About three-fourths 3 = Closer to half 9 = Skip EQUIPAGE Age of main heating equipment 1 = Less than 2 years old 2 = 2 to 4 years old 3 = 5 to 9 years old 4 = 10 to 19 years old 5 = 20 years or older 6 = Don't know 9 = Skip EQUIPM Type of heating equipment provides the heat 4 = Heat pump 3 = Central warm-air furnace with ducts 2 = Steam/hot water system with radiators 5 = Built-in electric units installed in walls 6 = Built-in floor/wall pipeless furnace 7 = Built-in heater burning gas, oil, kerosene 8 = Heating stove burning wood, coal, coke 10 = Portable electric heaters 11 = Portable kerosene heaters 9 = Fireplace 12 = Cooking stove used to heat and cook 14 = Geothermal heat pump 21 = Equipment not listed 00 = No heating equipment used FOPAY Who pays fuel oil 1 = Household pays 2 = Rent/Fee 3 = Other 9 = Skip

7-A-10FPFUEL Fireplace fuel 1 = Natural gas from underground pipes 2 = Bottled gas (LPG or propane) 7 = Wood 21 = Other 99 = Skip FUELTYPE* Type of heating fuel used FUELFOOD Cooking fuel 1 = Natural gas from underground pipes 2 = Bottled gas (LPG or propane) 5 = Electricity 21 = Other 99 = Skip FUELH2O Fuel used for heating water 1 = Natural gas from underground pipes 2 = Bottled gas (LPG or propane) 3 = Fuel oil 4 = Kerosene 5 = Electricity 7 = Wood 8 = Solar 21 = Other 95 = Don’t use hot water FUELHEAT Main fuel used for heating home 1 = Natural gas from underground pipes 2 = Bottled gas (LPG or propane) 3 = Fuel oil 4 = Kerosene 5 = Electricity 7 = Wood 8 = Solar 9 = District steam 10 = Coal 21 = Other 99 = Don’t heat home FUELPOOL Fuel used most often to heat pool water 1 = Natural gas from underground pipes 2 = Bottled Gas (LPG or Propane) 5 = Electricity 8 = Solar 99 = No Answer/Not Applicable FUELTUB Fuel used most often to heat spa/hot tub water 1 = Natural gas from underground pipes 2 = Bottled Gas (LPG or Propane) 3 = Fuel oil 5 = Electricity 8 = Solar 21 = Other 99 = Skip

7-A-11FUELUSE* Total fuel use HEATOTH Does the main space heating equipment also heat other residences? 1 = Yes 0 = No LPGPAY Who pays for bottled gas 1 = Household pays 2 = Rent/Fee 3 = Other 9 = Skip NCOMBATH Number of Complete Baths/full bathrooms NGFPFLUEFUELH2O Does the fireplace have a flue? 1 = Flue to the outside 2 = Flueless 9 = Skip

NHSLDMEM Number of household members (1-15) OTHERAPPLIANCETYPE* Other household appliance type PELHOTWA Who pays electricity for hot water 1 = Household pays 2 = Rent/fee 3 = Other 9 = Skip PGASHTWA Who pays natural gas for hot water 1 = Household pays 2 = Rent/fee 3 = Other 9 = Skip PIPEFUEL What fuel used in secondary pipelines furnace 1 = Natural gas from underground pipes 2 = Bottled gas (LPG or propane) 4 = Kerosene 5 = Electricity 7 = Wood 21 = Other 99 = Skip PIPELESS Pipeless furnace used as secondary heating equipment 1 = Yes 0 = No 9 = Skip POOL Is the pool heated? 1 = Yes 0 = No 9 = Skip POOR100 Household is below 100 percent of poverty PRESCHOOLCHILDREN* Number of household members between the ages of 0 and 5 PRKGPLC1 Home has Garage or Carport 1 = Yes 0 = No 9 = Skip

7-A-12RECBATH Does your home have a heated hot tub, spa 1 = Yes 0 = No 9 = Skip RMHTFUEL What fuel used in secondary room heater 1 = Natural gas from underground pipes 2 = Bottled gas (LPG or propane) 3 = Fuel oil 4 = Kerosene 99 = Skip ROOMHEAT Secondary Heating Equipment Built-in room heater burning 1 = Yes 0 = No 9 = Skip SCHOOLCHILDREN* Number of household members between the ages of 6 and 13 SECONDARYEQPTYPE* Secondary heating equipment type SENIORS* Number of household members between the ages of 65 and 95 SWIMPOOL Does residence have a swimming pool with filtering system? 1 = Yes 0 = No 9 = Skip TEMPGONE Winter household temperature during the day when no one is home 40-94 = degrees Fahrenheit 95 = Heat turned off 96 = Don't know 97 = Did not live in unit last winter 99 = Skip TEMPHOME Winter household temperature during the day when someone is home 40-94 = Temp when someone home 95 = Heat turned off 96 = Don't know 97 = Did not live in unit last winter 99 = Skip TEMPNITE Winter household temperature during sleeping hours 40-94 = Night temp 95 = Heat turned off 96 = Don't know 97 = Did not live in unit last winter 99 = No Answer/Not Applicable WEATHERLOCATIONCODE* Added to link to weather data (See App. 7-D) WELLPUMP Electric pump for well water 1 = Yes 0 = No

7-A-13WHEATAGE How old is your household's main water heater 0 = No separate water heater 1 = Less than 2 years old 2 = 2 to 4 years old 3 = 5 to 9 years old 4 = 10 to 19 years old 5 = 20 years or older 6 = Don't know 9 = Don’t use hot water WHEATOTH Main equipment also heat water for apartments 1 = Yes 0 = No 9 = No Answer/Not Applicable Don’t use hot water WHEATSIZ Size of household's main water heater tank 0 = Don’t have a separate water heater 1 = Small (30 gallons or less) 2 = Medium (31 to 49 gallons) 3 = Large (50 gallons or more) 5 = Two separate water heaters 6 = Have a tankless water heater 0 = Don't have a separate water heater 6 = Don't know 9 = No Answer/Not Applicable Don’t use hot water
* Not part of RECS 2005 variables.

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### REFERENCES

1. U.S. Department of Energy - Energy Information Administration, Residential Energy Consumption Survey: 2005 Public Use Data Files, 2005.

< http://www.eia.doe.gov/emeu/recs/recspubuse05/pubuse05.html >

2. U.S. Department of Energy - Energy Information Administration, Residential Energy Consumption Survey: 2001 Public Use Data Files, 2001.

< http://www.eia.doe.gov/emeu/recs/recs2001/publicuse2001.html >

3. U.S. Department of Energy - Energy Information Administration, Residential Energy Consumption Survey: 1997 Public Use Data Files, 1997.

< http://www.eia.doe.gov/emeu/recs/public.html >

4. U.S. Department of Energy - Energy Information Administration, Residential Energy Consumption Survey: 1993 Public Use Data Files 1993.

< http://www.eia.doe.gov/emeu/recs/93publicuse.html >

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