id,name,formula,input_rows,result,unit,limitations
d_recs_central_pct,"Share of US homes using central AC (main or secondary), RECS 2020, one decimal",sum NWEIGHT where ACEQUIPM_PUB=1 or ACEQUIPAUXTYPE_PUB=1 / sum NWEIGHT,RECS 2020 microdata (s3); matches row 5,67.3,percent,"Survey estimate, RSE 0.1%"
d_recs_any_ac_pct,"Share of US homes using any AC, RECS 2020","weighted share, flag any_ac",RECS 2020 microdata (s3),88.7,percent,Survey estimate
d_recs_any_ac_m,"US homes using any AC, RECS 2020","sum NWEIGHT, flag any_ac",RECS 2020 microdata (s3),109.51,million homes,Survey estimate
d_recs_no_ac_pct,"Share of US homes using no AC, RECS 2020","weighted share, flag no_ac",RECS 2020 microdata (s3),11.3,percent,Survey estimate
d_recs_no_ac_m,"US homes using no AC, RECS 2020","sum NWEIGHT, flag no_ac",RECS 2020 microdata (s3),14.02,million homes,Survey estimate
d_recs_individual_pct,"Share of US homes using individual units, RECS 2020","weighted share, flag individual",RECS 2020 microdata (s3),26.2,percent,Survey estimate
d_recs_individual_m,"US homes using individual units, RECS 2020","sum NWEIGHT, flag individual",RECS 2020 microdata (s3),32.42,million homes,Survey estimate
d_recs_central_main_pct,"Share of US homes using central AC as MAIN equipment, RECS 2020","weighted share, flag central_main",RECS 2020 microdata (s3),66.9,percent,Survey estimate
d_recs_central_main_m,"US homes using central AC as MAIN equipment, RECS 2020","sum NWEIGHT, flag central_main",RECS 2020 microdata (s3),82.69,million homes,Survey estimate
d_recs_room_window_main_pct,"Share of US homes using window/wall or portable unit as main equipment, RECS 2020","weighted share, flag room_window_main",RECS 2020 microdata (s3),19.5,percent,Survey estimate
d_recs_room_window_main_m,"US homes using window/wall or portable unit as main equipment, RECS 2020","sum NWEIGHT, flag room_window_main",RECS 2020 microdata (s3),24.1,million homes,Survey estimate
d_recs_minisplit_any_pct,"Share of US homes using a ductless mini-split (main or secondary), RECS 2020","weighted share, flag minisplit_any",RECS 2020 microdata (s3),2.1,percent,Survey estimate
d_recs_minisplit_any_m,"US homes using a ductless mini-split (main or secondary), RECS 2020","sum NWEIGHT, flag minisplit_any",RECS 2020 microdata (s3),2.57,million homes,Survey estimate
d_cage_Less than 2 years,"Central AC (main equipment) aged Less than 2 years, US 2020",sum NWEIGHT where ACEQUIPM_PUB=1 and ACEQUIPAGE=band,RECS 2020 microdata (s3),10.76,million homes,Respondent-reported age band
d_cage_pct_Less than 2 years,"Share of central AC systems aged Less than 2 years, US 2020",band / all central-main homes,RECS 2020 microdata (s3),13.0,percent,Respondent-reported age band
d_cage_2 to 4 years,"Central AC (main equipment) aged 2 to 4 years, US 2020",sum NWEIGHT where ACEQUIPM_PUB=1 and ACEQUIPAGE=band,RECS 2020 microdata (s3),13.49,million homes,Respondent-reported age band
d_cage_pct_2 to 4 years,"Share of central AC systems aged 2 to 4 years, US 2020",band / all central-main homes,RECS 2020 microdata (s3),16.3,percent,Respondent-reported age band
d_cage_5 to 9 years,"Central AC (main equipment) aged 5 to 9 years, US 2020",sum NWEIGHT where ACEQUIPM_PUB=1 and ACEQUIPAGE=band,RECS 2020 microdata (s3),22.03,million homes,Respondent-reported age band
d_cage_pct_5 to 9 years,"Share of central AC systems aged 5 to 9 years, US 2020",band / all central-main homes,RECS 2020 microdata (s3),26.6,percent,Respondent-reported age band
d_cage_10 to 14 years,"Central AC (main equipment) aged 10 to 14 years, US 2020",sum NWEIGHT where ACEQUIPM_PUB=1 and ACEQUIPAGE=band,RECS 2020 microdata (s3),17.12,million homes,Respondent-reported age band
d_cage_pct_10 to 14 years,"Share of central AC systems aged 10 to 14 years, US 2020",band / all central-main homes,RECS 2020 microdata (s3),20.7,percent,Respondent-reported age band
d_cage_15 to 19 years,"Central AC (main equipment) aged 15 to 19 years, US 2020",sum NWEIGHT where ACEQUIPM_PUB=1 and ACEQUIPAGE=band,RECS 2020 microdata (s3),9.83,million homes,Respondent-reported age band
d_cage_pct_15 to 19 years,"Share of central AC systems aged 15 to 19 years, US 2020",band / all central-main homes,RECS 2020 microdata (s3),11.9,percent,Respondent-reported age band
d_cage_20 years or more,"Central AC (main equipment) aged 20 years or more, US 2020",sum NWEIGHT where ACEQUIPM_PUB=1 and ACEQUIPAGE=band,RECS 2020 microdata (s3),9.47,million homes,Respondent-reported age band
d_cage_pct_20 years or more,"Share of central AC systems aged 20 years or more, US 2020",band / all central-main homes,RECS 2020 microdata (s3),11.5,percent,Respondent-reported age band
d_central_main_10plus_m,"Central AC systems 10 years or older, US 2020",sum NWEIGHT over age bands,RECS 2020 microdata (s3),36.42,million homes,Main equipment only
d_central_main_10plus_share,"Share of central AC systems 10 years or older, US 2020",central_main_10plus / central_main,RECS 2020 microdata (s3),44.0,percent,Main equipment only
d_central_main_15plus_m,"Central AC systems 15 years or older, US 2020",sum NWEIGHT over age bands,RECS 2020 microdata (s3),19.3,million homes,Main equipment only
d_central_main_15plus_share,"Share of central AC systems 15 years or older, US 2020",central_main_15plus / central_main,RECS 2020 microdata (s3),23.3,percent,Main equipment only
d_central_main_20plus_m,"Central AC systems 20 years or older, US 2020",sum NWEIGHT over age bands,RECS 2020 microdata (s3),9.47,million homes,Main equipment only
d_central_main_20plus_share,"Share of central AC systems 20 years or older, US 2020",central_main_20plus / central_main,RECS 2020 microdata (s3),11.5,percent,Main equipment only
d_cage_under10_cum,"Cumulative share of central AC systems under 10 years old, US 2020 (median band check)","sum of shares <2, 2 to 4, 5 to 9",RECS 2020 microdata (s3),55.9,percent,Shows the median system falls in the 5 to 9 year band
d_main15_share,"Share of ALL main AC equipment 15 years or older, US 2020",main_15plus / main_ac_any,"RECS 2020 microdata (s3); published HC7.1 rows 172, 173",19.7,percent,All main equipment types
d_nocentral_US,"US occupied homes without central AC, 2025 (signature)",(1 - central_share_RECS2020) x occupied_units_ACS2025,d_recs_central_pct; rows 312,43.8,million homes,Assumes 2020 central AC share held in 2025; ignores new construction and conversions since 2020
d_nocentral_CA,"Occupied homes without central AC, California, 2025 (rank 1)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 265,6430,thousand homes,Central share RSE 2.4%; 2020 share applied to 2025 stock
d_nocentral_NY,"Occupied homes without central AC, New York, 2025 (rank 2)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 295,5561,thousand homes,Central share RSE 5.1%; 2020 share applied to 2025 stock
d_nocentral_PA,"Occupied homes without central AC, Pennsylvania, 2025 (rank 3)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 299,2514,thousand homes,Central share RSE 3.9%; 2020 share applied to 2025 stock
d_nocentral_WA,"Occupied homes without central AC, Washington, 2025 (rank 4)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 308,2242,thousand homes,Central share RSE 8.4%; 2020 share applied to 2025 stock
d_nocentral_TX,"Occupied homes without central AC, Texas, 2025 (rank 5)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 304,1973,thousand homes,Central share RSE 1.4%; 2020 share applied to 2025 stock
d_nocentral_MA,"Occupied homes without central AC, Massachusetts, 2025 (rank 6)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 280,1921,thousand homes,Central share RSE 5.2%; 2020 share applied to 2025 stock
d_nocentral_MI,"Occupied homes without central AC, Michigan, 2025 (rank 7)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 283,1392,thousand homes,Central share RSE 4.3%; 2020 share applied to 2025 stock
d_nocentral_NJ,"Occupied homes without central AC, New Jersey, 2025 (rank 8)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 292,1385,thousand homes,Central share RSE 4.5%; 2020 share applied to 2025 stock
d_nocentral_IL,"Occupied homes without central AC, Illinois, 2025 (rank 9)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 275,1341,thousand homes,Central share RSE 2.9%; 2020 share applied to 2025 stock
d_nocentral_OH,"Occupied homes without central AC, Ohio, 2025 (rank 10)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 296,1306,thousand homes,Central share RSE 3.4%; 2020 share applied to 2025 stock
d_nocentral_CO,"Occupied homes without central AC, Colorado, 2025 (rank 11)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 266,1073,thousand homes,Central share RSE 4.8%; 2020 share applied to 2025 stock
d_nocentral_CT,"Occupied homes without central AC, Connecticut, 2025 (rank 12)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 267,962,thousand homes,Central share RSE 6.7%; 2020 share applied to 2025 stock
d_nocentral_FL,"Occupied homes without central AC, Florida, 2025 (rank 13)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 270,898,thousand homes,Central share RSE 1.5%; 2020 share applied to 2025 stock
d_nocentral_OR,"Occupied homes without central AC, Oregon, 2025 (rank 14)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 298,889,thousand homes,Central share RSE 5.5%; 2020 share applied to 2025 stock
d_nocentral_WI,"Occupied homes without central AC, Wisconsin, 2025 (rank 15)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 309,841,thousand homes,Central share RSE 3.6%; 2020 share applied to 2025 stock
d_nocentral_MN,"Occupied homes without central AC, Minnesota, 2025 (rank 16)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 284,754,thousand homes,Central share RSE 3.5%; 2020 share applied to 2025 stock
d_nocentral_NC,"Occupied homes without central AC, North Carolina, 2025 (rank 17)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 288,705,thousand homes,Central share RSE 2.0%; 2020 share applied to 2025 stock
d_nocentral_GA,"Occupied homes without central AC, Georgia, 2025 (rank 18)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 271,618,thousand homes,Central share RSE 2.1%; 2020 share applied to 2025 stock
d_nocentral_VA,"Occupied homes without central AC, Virginia, 2025 (rank 19)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 306,608,thousand homes,Central share RSE 2.2%; 2020 share applied to 2025 stock
d_nocentral_ME,"Occupied homes without central AC, Maine, 2025 (rank 20)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 282,561,thousand homes,Central share RSE 20.7%; 2020 share applied to 2025 stock
d_nocentral_IN,"Occupied homes without central AC, Indiana, 2025 (rank 21)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 276,543,thousand homes,Central share RSE 2.8%; 2020 share applied to 2025 stock
d_nocentral_MD,"Occupied homes without central AC, Maryland, 2025 (rank 22)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 281,489,thousand homes,Central share RSE 3.1%; 2020 share applied to 2025 stock
d_nocentral_NH,"Occupied homes without central AC, New Hampshire, 2025 (rank 23)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 291,453,thousand homes,Central share RSE 13.9%; 2020 share applied to 2025 stock
d_nocentral_LA,"Occupied homes without central AC, Louisiana, 2025 (rank 24)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 279,451,thousand homes,Central share RSE 2.9%; 2020 share applied to 2025 stock
d_nocentral_MO,"Occupied homes without central AC, Missouri, 2025 (rank 25)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 285,445,thousand homes,Central share RSE 2.9%; 2020 share applied to 2025 stock
d_nocentral_HI,"Occupied homes without central AC, Hawaii, 2025 (rank 26)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 272,443,thousand homes,Central share RSE 17.7%; 2020 share applied to 2025 stock
d_nocentral_AZ,"Occupied homes without central AC, Arizona, 2025 (rank 27)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 264,436,thousand homes,Central share RSE 2.2%; 2020 share applied to 2025 stock
d_nocentral_TN,"Occupied homes without central AC, Tennessee, 2025 (rank 28)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 303,421,thousand homes,Central share RSE 2.0%; 2020 share applied to 2025 stock
d_nocentral_NM,"Occupied homes without central AC, New Mexico, 2025 (rank 29)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 293,406,thousand homes,Central share RSE 7.6%; 2020 share applied to 2025 stock
d_nocentral_AL,"Occupied homes without central AC, Alabama, 2025 (rank 30)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 262,384,thousand homes,Central share RSE 3.0%; 2020 share applied to 2025 stock
d_nocentral_AR,"Occupied homes without central AC, Arkansas, 2025 (rank 31)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 263,352,thousand homes,Central share RSE 4.1%; 2020 share applied to 2025 stock
d_nocentral_SC,"Occupied homes without central AC, South Carolina, 2025 (rank 32)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 301,313,thousand homes,Central share RSE 2.1%; 2020 share applied to 2025 stock
d_nocentral_RI,"Occupied homes without central AC, Rhode Island, 2025 (rank 33)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 300,310,thousand homes,Central share RSE 10.4%; 2020 share applied to 2025 stock
d_nocentral_KY,"Occupied homes without central AC, Kentucky, 2025 (rank 34)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 278,304,thousand homes,Central share RSE 2.2%; 2020 share applied to 2025 stock
d_nocentral_MT,"Occupied homes without central AC, Montana, 2025 (rank 35)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 287,288,thousand homes,Central share RSE 9.1%; 2020 share applied to 2025 stock
d_nocentral_ID,"Occupied homes without central AC, Idaho, 2025 (rank 36)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 274,277,thousand homes,Central share RSE 4.7%; 2020 share applied to 2025 stock
d_nocentral_AK,"Occupied homes without central AC, Alaska, 2025 (rank 37)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 261,277,thousand homes,Central share RSE 56.6%; 2020 share applied to 2025 stock
d_nocentral_NV,"Occupied homes without central AC, Nevada, 2025 (rank 38)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 294,275,thousand homes,Central share RSE 3.4%; 2020 share applied to 2025 stock
d_nocentral_WV,"Occupied homes without central AC, West Virginia, 2025 (rank 39)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 310,272,thousand homes,Central share RSE 4.5%; 2020 share applied to 2025 stock
d_nocentral_OK,"Occupied homes without central AC, Oklahoma, 2025 (rank 40)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 297,271,thousand homes,Central share RSE 3.0%; 2020 share applied to 2025 stock
d_nocentral_VT,"Occupied homes without central AC, Vermont, 2025 (rank 41)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 307,264,thousand homes,Central share RSE 24.8%; 2020 share applied to 2025 stock
d_nocentral_IA,"Occupied homes without central AC, Iowa, 2025 (rank 42)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 273,256,thousand homes,Central share RSE 2.7%; 2020 share applied to 2025 stock
d_nocentral_UT,"Occupied homes without central AC, Utah, 2025 (rank 43)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 305,252,thousand homes,Central share RSE 4.4%; 2020 share applied to 2025 stock
d_nocentral_MS,"Occupied homes without central AC, Mississippi, 2025 (rank 44)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 286,248,thousand homes,Central share RSE 4.2%; 2020 share applied to 2025 stock
d_nocentral_KS,"Occupied homes without central AC, Kansas, 2025 (rank 45)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 277,179,thousand homes,Central share RSE 3.5%; 2020 share applied to 2025 stock
d_nocentral_WY,"Occupied homes without central AC, Wyoming, 2025 (rank 46)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 311,154,thousand homes,Central share RSE 9.6%; 2020 share applied to 2025 stock
d_nocentral_ND,"Occupied homes without central AC, North Dakota, 2025 (rank 47)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 289,147,thousand homes,Central share RSE 5.6%; 2020 share applied to 2025 stock
d_nocentral_NE,"Occupied homes without central AC, Nebraska, 2025 (rank 48)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 290,119,thousand homes,Central share RSE 3.2%; 2020 share applied to 2025 stock
d_nocentral_DC,"Occupied homes without central AC, District of Columbia, 2025 (rank 49)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 268,107,thousand homes,Central share RSE 5.0%; 2020 share applied to 2025 stock
d_nocentral_SD,"Occupied homes without central AC, South Dakota, 2025 (rank 50)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 302,91,thousand homes,Central share RSE 4.4%; 2020 share applied to 2025 stock
d_nocentral_DE,"Occupied homes without central AC, Delaware, 2025 (rank 51)",(1 - central_pct_RECS2020_state/100) x occupied_units_ACS2025_state,RECS 2020 microdata (s3); rows 269,63,thousand homes,Central share RSE 4.0%; 2020 share applied to 2025 stock
d_nocentral_top5_share,Share of US homes without central AC located in the top 5 states,sum(top 5 states) / sum(51 states),d_nocentral_* rows,43.3,percent,Same assumptions as state rows
d_nocentral_top5_sum,"Homes without central AC in the top 5 states, 2025",sum(top 5 states),d_nocentral_* rows,18.7,million homes,
d_nocentral_sum51,"Sum of 51 state estimates of homes without central AC, 2025",sum over states,d_nocentral_* rows,43.3,million homes,Differs slightly from the national estimate because state shares and national share are separate estimates
d_under_half_count,"States (incl. DC) where under half of homes use central AC, RECS 2020",count central_pct < 50,RECS 2020 microdata (s3); s1 published integers agree,13,states,Alaska central estimate withheld by EIA (RSE 56.6%)
d_under_half_homes,"Occupied homes in those states, 2025",sum occupied_units_ACS2025,ACS rows,20.5,million homes,
d_under_half_nocentral,"Homes without central AC in those states, 2025",sum d_nocentral over these states,d_nocentral_* rows,14.3,million homes,
d_under_half_share_of_nocentral,Share of all US homes without central AC that sit in those states,sum(under-half states) / sum(51 states),d_nocentral_* rows,33.1,percent,
d_ahs_1985,AHS 1985: central / room / no AC shares of occupied units,category / (central + room + none),"AHS national PUF (s15), weighted tabulation",33.3 / 29.4 / 37.3,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_1989,AHS 1989: central / room / no AC shares of occupied units,category / (central + room + none),"AHS national PUF (s15), weighted tabulation",40.1 / 29.0 / 30.9,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_1993,AHS 1993: central / room / no AC shares of occupied units,category / (central + room + none),"AHS national PUF (s15), weighted tabulation",44.5 / 27.5 / 27.9,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_1997,AHS 1997: central / room / no AC shares of occupied units,category / (central + room + none),"AHS national PUF (s15), weighted tabulation",50.2 / 26.3 / 23.6,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_2001,AHS 2001: central / room / no AC shares of occupied units,category / (central + room + none),"AHS national PUF (s15), weighted tabulation",56.6 / 25.0 / 18.4,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_2005,AHS 2005: central / room / no AC shares of occupied units,category / (central + room + none),"AHS national PUF (s15), weighted tabulation",62.2 / 22.8 / 15.0,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_2009,AHS 2009: central / room / no AC shares of occupied units,category / (central + room + none),"AHS national PUF (s15), weighted tabulation",65.1 / 22.0 / 12.9,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_2013,AHS 2013: central / room / no AC shares of occupied units,category / (central + room + none),"AHS national PUF (s15), weighted tabulation",66.7 / 21.8 / 11.5,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_2015,AHS 2015: central / room / no AC shares of occupied units,category / (central + room + none),"AHS national PUF (s15), weighted tabulation",67.6 / 21.4 / 11.0,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_2017,AHS 2017: central / room / no AC shares of occupied units,category / total occupied (Table Creator),"rows 184, 185",69.5 / 20.9 / 9.6,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_2019,AHS 2019: central / room / no AC shares of occupied units,category / total occupied (Table Creator),"rows 188, 189",71.4 / 19.8 / 8.8,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_2021,AHS 2021: central / room / no AC shares of occupied units,category / total occupied (Table Creator),"rows 192, 193",72.4 / 20.0 / 7.6,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_2023,AHS 2023: central / room / no AC shares of occupied units,category / total occupied (Table Creator),"rows 196, 197",73.9 / 19.2 / 6.9,percent,AHS redesigned its sample in 2015 and its AC questions in 2015; 1985 to 2013 use AIR and AIRSYS
d_ahs_central_change,"Change in central AC share of occupied homes, AHS 1985 to 2023",central_share_2023 - central_share_1985,"d_ahs_1985, d_ahs_2023",40.6,percentage points,Survey redesign in 2015
d_ahs_central_growth_m,"Growth in occupied homes with central AC, AHS 1985 to 2023",central_2023 - central_1985,"d_ahs_1985, d_ahs_2023",69.0,million homes,
d_ahs_none_1985_m,"Occupied homes without AC, AHS 1985",PUF tabulation,s15,33.0,million homes,
d_ahs_2013_check,AHS 2013 PUF central AC tabulation minus published value,PUF - published,s15; rows 201,0.3,thousand units,"Validation: our tabulation reproduces the published 77,315"
d_validation_cells,"Published EIA state cells reproduced by our microdata tabulation (any AC, central, individual)",count of non-withheld cells where round(our share) = published share,s1 vs RECS 2020 microdata (s3),152,cells,0 mismatches; 1 withheld cell (Alaska central)
d_recs20_records,RECS 2020 microdata records used,row count,s3,18496,households,
d_recs24_records,RECS 2024 microdata records used,row count,s9,16676,households,
d_sample_range,"RECS 2020 sample households per state, smallest and largest",min and max of state sample counts,RECS 2020 microdata (s3),143 to 1152,households,
d_gap_recs_lace_us,"RECS 2020 no-AC share minus LACE 2023 no-AC share, US",no_ac_RECS - no_ac_LACE,d_recs_no_ac_pct; rows 202,4.4,percentage points,Different questions (uses vs has) and different years
d_gap_states_over5,States where the RECS 2020 no-AC share exceeds the LACE 2023 share by more than 5 points,count(no_ac_RECS - no_ac_LACE > 5),t1 columns,17,states,
d_r24_broken_m,"US homes unable to use AC in the past year because it was broken and repair or replacement was unaffordable, 2024",sum NWEIGHT where NOACBROKE=1,RECS 2024 microdata (s9),6.88,million homes,Preliminary RECS 2024; RSE 4.2%
d_r24_broken_pct,"Share of US homes unable to use AC because it was broken and unaffordable to fix, 2024",NOACBROKE homes / all homes,RECS 2024 microdata (s9),5.2,percent,Preliminary
d_r24_either_check,"RECS 2024 microdata total unable to use AC (broken or disconnected), check against HC11.1",sum NWEIGHT where NOACBROKE=1 or NOACEL=1,s9; rows 258,8.16,million homes,Matches published 8.16
d_corr_cdd_age,Correlation across states: 30-year cooling degree days vs share of central AC 15+ years old,Pearson r over states with >=100 central-AC sample homes and RSE <= 30%,RECS 2020 microdata (s3); 42 states,-0.69,correlation coefficient,"Association only, not a cause; CDD30YR_PUB is perturbed by EIA for privacy"
d_corr_n,States used in the cooling degree day correlation,count,RECS 2020 microdata (s3),42,states,
d_t3_Mobile home,"RECS 2020 AC shares, Mobile home",weighted shares within group,RECS 2020 microdata (s3),central 58.0 / no AC 11.2 / 15+ 19.4,percent,Survey estimate
d_t3_Single-family detached,"RECS 2020 AC shares, Single-family detached",weighted shares within group,RECS 2020 microdata (s3),central 75.3 / no AC 9.5 / 15+ 21.6,percent,Survey estimate
d_t3_Single-family attached,"RECS 2020 AC shares, Single-family attached",weighted shares within group,RECS 2020 microdata (s3),central 69.4 / no AC 11.8 / 15+ 21.8,percent,Survey estimate
"d_t3_Apartment, 2 to 4 units","RECS 2020 AC shares, Apartment, 2 to 4 units",weighted shares within group,RECS 2020 microdata (s3),central 41.0 / no AC 19.0 / 15+ 14.5,percent,Survey estimate
"d_t3_Apartment, 5 or more units","RECS 2020 AC shares, Apartment, 5 or more units",weighted shares within group,RECS 2020 microdata (s3),central 53.3 / no AC 14.3 / 15+ 36.5,percent,Survey estimate
d_t3_Owned,"RECS 2020 AC shares, Owned",weighted shares within group,RECS 2020 microdata (s3),central 74.7 / no AC 8.8 / 15+ 22.6,percent,Survey estimate
d_t3_Rented,"RECS 2020 AC shares, Rented",weighted shares within group,RECS 2020 microdata (s3),central 52.1 / no AC 16.5 / 15+ 25.2,percent,Survey estimate
d_div_West North Central,"Central AC 15+ years old share, West North Central",weighted share of central-main homes,RECS 2020 microdata (s3),30.5,percent,Survey estimate
d_div_New England,"Central AC 15+ years old share, New England",weighted share of central-main homes,RECS 2020 microdata (s3),30.4,percent,Survey estimate
d_div_Pacific,"Central AC 15+ years old share, Pacific",weighted share of central-main homes,RECS 2020 microdata (s3),29.1,percent,Survey estimate
d_div_East North Central,"Central AC 15+ years old share, East North Central",weighted share of central-main homes,RECS 2020 microdata (s3),28.7,percent,Survey estimate
d_div_Middle Atlantic,"Central AC 15+ years old share, Middle Atlantic",weighted share of central-main homes,RECS 2020 microdata (s3),28.0,percent,Survey estimate
d_div_Mountain North,"Central AC 15+ years old share, Mountain North",weighted share of central-main homes,RECS 2020 microdata (s3),24.4,percent,Survey estimate
d_div_Mountain South,"Central AC 15+ years old share, Mountain South",weighted share of central-main homes,RECS 2020 microdata (s3),19.7,percent,Survey estimate
d_div_East South Central,"Central AC 15+ years old share, East South Central",weighted share of central-main homes,RECS 2020 microdata (s3),19.5,percent,Survey estimate
d_div_South Atlantic,"Central AC 15+ years old share, South Atlantic",weighted share of central-main homes,RECS 2020 microdata (s3),18.0,percent,Survey estimate
d_div_West South Central,"Central AC 15+ years old share, West South Central",weighted share of central-main homes,RECS 2020 microdata (s3),17.7,percent,Survey estimate