id,name,formula,input_rows,result,unit,limitations
d1,"Share of US commercial air-conditioned floor area served by packaged units, 2018 (signature)","sum_i FINALWT_i x SQFT_i x COOLP_i/100 x PKGCP_EL_i / sum_k(pct-cooled_k,i) / sum_i FINALWT_i x SQFT_i x COOLP_i/100",11,51.7250,percent of cooled floor area,Allocation normalises each building's pct-cooled answers to 100 when two systems serve the same space (697 records); respondent estimates
d2,"Packaged-unit floor area served, 2018",d1 numerator,11,35309.7,million sq ft,Same as d1
d3,"Buildings with a packaged unit as main cooling equipment, 2018",sum FINALWT where MAINCL=2,56,2403.54,thousand buildings,RSE 4.6%
d4,"Packaged-main buildings with no building automation system, 2018",sum FINALWT where MAINCL=2 and EMCS=2,"92, 56",1878.77,thousand buildings,RSE 5.1%; share of packaged-main buildings = 78.17%; with BAS = 21.83%
d5,Gap between 'floorspace in buildings using packaged AC' and floorspace actually served by packaged AC,any-use floorspace share (PKGCL=1) minus packaged-served floor area / all floorspace,15,21.97,percentage points,Packaged-served area = 36.58% of all commercial floorspace
d6,"Share of heated floor area served by each heating equipment type, 2018",as d1 using HEATP and the *HP_* pct-heated variables,12,Packaged unit 38.90; Furnace 11.57; Boiler 24.59; Heat pump 6.96; Individual space heater 7.07; District steam or hot water 7.04; Other heating equipment 3.87,percent of heated floor area,"1,677 records report overlapping heating systems; normalised to 100"
d7,"HVAC share of commercial major-fuel energy use, 2018","(space heating + cooling + ventilation) / total, Table E1","110, 112, 114, 116",51.33,percent,"HVAC = 3484 trillion Btu; heating 31.93%, cooling 8.68%, ventilation 10.73% of total; microdata cross-check 51.34%"
d8,"HVAC share of energy use by building activity, 2018","(heat + cool + vent) / total per activity row, Table E1",Table E1 activity rows,Mercantile 44.60; Office 56.72; Education 60.77; Warehouse and storage 53.79; Health care 53.70; Lodging 39.46; Public assembly 68.78; Service 64.15; Food service 25.21; Food sales 22.75; Religious worship 64.77; Public order and safety 51.13; Other 39.02; Vacant 59.26,percent,Modeled end uses; Q cells excluded
d9,"Cooling and heating equipment types per conditioned building, 2018",sum of any-use building shares / share of buildings cooled (heated),"9, 10",cooling 1.18; heating 1.36; cooling share sum 91.97; heating share sum 112.32,types per building,Excludes 'other' equipment categories
d10,"BAS prevalence, largest vs smallest buildings, 2018","BAS share over 200,000 sq ft / BAS share 1,001 to 10,000 sq ft",size rows,7.02,ratio,Size class RSEs 3.0% and 9.9%
d11,2012 shares from published tables (for the 2012 vs 2018 comparison),table value / all buildings (or floorspace) x 100,"121, 122, 124, 125, 126, 127, 131",pkg AC bldg 34.35; pkg AC floor 51.84; chiller floor 19.57; HP cool bldg 12.45; pkg heat bldg 50.42; furnace bldg 13.59; boiler floor 25.77,percent,2018 questionnaire restructured equipment questions by energy source (s17); not a clean trend
d12,Pre-2000 buildings with an HVAC equipment upgrade since 2000,sum FINALWT (YRCONC<=7 and RENHVC=1) / sum FINALWT (YRCONC<=7),"108, 109",20.58,percent,"RSE 5.8%; renovation question, not equipment age"
d13,Record counts behind cleaning and exclusion steps,row counts in the 2018 microdata file,5,records not cooled 456; records with no cooling equipment answer 456; records with no heating equipment answer 429; records with BAS missing 243; records with MAINCL missing 456; records with MAINHT missing 429; cooling rows with overlapping percent-cooled answers 697; heating rows with overlapping percent-heated answers 1677; PKGHPH don't know records 369; pre-2000 cooled records 4331; pre-2000 cooled records missing NWMNCL 1617,records,Unweighted sample counts