HFCs
Synthetic greenhouse gases
HFCs, or hydrofluorocarbons, are synthetic gases used primarily as refrigerants in air conditioning and cooling systems.
They replaced ozone-depleting chlorofluorocarbons (CFCs) but are themselves potent greenhouse gases, trapping far more heat than carbon dioxide.
International agreements now aim to phase them down: The building's cooling system was retrofitted to eliminate HFCs.
Heat-trapping atmospheric compound
- emissionsSubstances released into air
- warmingIncreasing in temperature
- climate impactEcological consequence of conditions
- troposphereLowest atmospheric layer
Carbon-halogen chemical compounds
- halocarbonsCarbon compounds containing halogens
- chemical stabilityResistance to molecular change
- non-flammableUnable to burn
- chlorine-freeContains no Cl
Suspended particles in gas
- propellantsThrust-producing chemicals
- solventsLiquids that dissolve substances
- fire-suppressionPutting out active flames
- semiconductorsPartially conductive materials
insulation · spray foam · industrial applications · polyurethane foam
Acrid nitrogen-hydrogen gas
Heat-transfer medium
- coolantTemperature-regulating fluid
- freonChlorofluorocarbon refrigerant brand
- chillerRefrigeration unit or horror
- ACElectrical current or cooling
air conditioning · compressor · evaporator · condenser · cold chain · temperature control · walk-in cooler · heat pump
Mandated numerical limits
- complianceAdhering to requirements
- enforcementCompelling compliance with rules
- bansOfficial restrictions imposed
- emission limitsPermitted pollution thresholds
certification · leak detection · reclamation · recovery · trade restrictions · illegal trade · monitoring
greenhouse gas
Heat-trapping atmospheric compound
- emissionsSubstances released into air
- warmingIncreasing in temperature
- climate impactEcological consequence of conditions
fluorocarbons
Carbon-halogen chemical compounds
- halocarbonsCarbon compounds containing halogens
- chemical stabilityResistance to molecular change
- non-flammableUnable to burn
aerosols
Suspended particles in gas
- propellantsThrust-producing chemicals
- solventsLiquids that dissolve substances
- fire-suppressionPutting out active flames
semiconductors · insulation · spray foam · industrial applications · polyurethane foam
ammonia
Acrid nitrogen-hydrogen gas
refrigerant
Heat-transfer medium
- coolantTemperature-regulating fluid
- freonChlorofluorocarbon refrigerant brand
- chillerRefrigeration unit or horror
AC · air conditioning · compressor · evaporator · condenser · cold chain · temperature control · walk-in cooler · heat pump · defrost
quotas
Mandated numerical limits
- complianceAdhering to requirements
- enforcementCompelling compliance with rules
- bansOfficial restrictions imposed
emission limits · certification · leak detection · reclamation · recovery · trade restrictions · illegal trade · monitoring
HFCsCFCs
Ozone-depleting compounds, abbreviated
chlorofluorocarbons · hydrochlorofluorocarbons · Freon · halons · carbon tetrachloride
HFCshydrocarbons
Carbon-hydrogen organic compounds
ammonia · propane · isobutane · carbon dioxide · water