{
 "utility": "Duke Energy Carolinas",
 "utility_legal_name": "Duke Energy Carolinas, LLC",
 "eia_id": 5416,
 "state": "SC",
 "state_name": "South Carolina",
 "url": "https://meterwise.app/sc/duke-energy-carolinas/heat-pump-vs-furnace/",
 "markdown_url": "https://meterwise.app/sc/duke-energy-carolinas/heat-pump-vs-furnace/index.md",
 "json_url": "https://meterwise.app/data/v1/utilities/sc/duke-energy-carolinas.json",
 "json_path": "data/v1/utilities/sc/duke-energy-carolinas.json",
 "updated": "2026-11-10",
 "zip_codes_served": 194,
 "quick_answer": "As of November 2026, for a typical 1,800 sq ft gas-heated home on Duke Energy Carolinas electricity rates in South Carolina that needs a new furnace and AC: It depends on your quotes. A heat pump saves about $210 a year to run, so it comes out ahead over 15 years if its quote is no more than $3,100 above the quote for a new furnace and AC.",
 "verdict": "depends on quotes",
 "verdict_code": "depends",
 "assumptions": {
  "floor_area_sqft": 1800,
  "insulation": "average",
  "scenario": "furnace and AC both need replacing",
  "heating_fuel": "gas",
  "lifetime_years": 15
 },
 "electricity": {
  "price_per_kwh_typical_bill": 0.1621,
  "winter_extra_kwh_price": 0.1415,
  "state_average_per_kwh": 0.1583,
  "vs_state_average_pct": 2,
  "source": "utility tariff (U.S. Utility Rate Database)",
  "tariff": "Residential Service (RES-55) Single Phase",
  "tariff_effective": "2026-02-01",
  "note": "Electricity: Residential Service (RES-55) Single Phase tariff for Duke Energy Carolinas, effective 2026-02-01, from the U.S. Utility Rate Database, applied tier by tier to the extra kWh."
 },
 "climate": {
  "station": "Spartanburg 3 Sse",
  "heating_degree_days": 3015,
  "cooling_degree_days": 1664,
  "normals": "NOAA 1991-2020"
 },
 "heating_fuel": {
  "default": "gas",
  "price_per_therm_gas": 1.634,
  "local_mix": {
   "electric": 0.606,
   "gas": 0.328,
   "oil": 0.008,
   "other": 0.02,
   "propane": 0.037
  }
 },
 "heat_pump": {
  "option": "Heat pump (replaces both)",
  "annual_saving_vs_like_for_like": 208,
  "break_even_quote_gap": 3117
 },
 "options": [
  {
   "id": "like",
   "option": "New gas furnace + new AC",
   "installed_typical": 11086,
   "installed_low": 8676,
   "installed_high": 13496,
   "rebates": 0,
   "energy_cost_per_year": 791,
   "electricity_kwh_per_year": 2143,
   "fuel_per_year": "288 therms",
   "total_15_years": 22944
  },
  {
   "id": "hp",
   "option": "Heat pump (replaces both)",
   "installed_typical": 11086,
   "installed_low": 7712,
   "installed_high": 14460,
   "rebates": 0,
   "energy_cost_per_year": 583,
   "electricity_kwh_per_year": 4010,
   "fuel_per_year": null,
   "total_15_years": 19827
  },
  {
   "id": "hp_cold",
   "option": "High-efficiency cold-climate heat pump",
   "installed_typical": 14460,
   "installed_low": 10604,
   "installed_high": 19280,
   "rebates": 0,
   "energy_cost_per_year": 457,
   "electricity_kwh_per_year": 3155,
   "fuel_per_year": null,
   "total_15_years": 21321
  }
 ],
 "rebates_checked": false,
 "rebate_programs": [],
 "license": "https://creativecommons.org/licenses/by/4.0/",
 "citation": "MeterWise, \"Heat pump vs. gas furnace and AC on Duke Energy Carolinas rates (SC)\", updated 2026-11-10, https://meterwise.app/sc/duke-energy-carolinas/heat-pump-vs-furnace/"
}