{
  "provider": {
    "name": "CalculateEnergySavings.com",
    "source_url": "https://calculateenergysavings.com/",
    "terms_url": "https://calculateenergysavings.com/api-terms/",
    "terms_version": "2026-08-25"
  },
  "id": "water-heater-comparison",
  "name": "Water Heater Operating Cost Comparison",
  "description": "Compare annual water-heating energy and cost across electric, heat-pump, gas, oil, and other systems with editable efficiency and fuel-price inputs.",
  "status": "published",
  "callable": true,
  "version": "1.0.0",
  "url": "https://calculateenergysavings.com/calculators/water-heater-comparison/",
  "methodology_url": "https://calculateenergysavings.com/calculators/water-heater-comparison/#methodology",
  "api_url": "https://calculateenergysavings.com/api/v1/calculators/water-heater-comparison",
  "calculate_url": "https://calculateenergysavings.com/api/v1/calculators/water-heater-comparison/calculate",
  "input_schema": {
    "type": "object",
    "additionalProperties": false,
    "properties": {
      "dailyHotWaterGallons": {
        "type": "number",
        "default": 50
      },
      "temperatureRiseF": {
        "type": "number",
        "default": 70
      },
      "existingFuelType": {
        "type": "string",
        "default": "gas"
      },
      "existingUef": {
        "type": "number",
        "default": 0.64
      },
      "existingFuelPrice": {
        "type": "number",
        "default": 1.5
      },
      "proposedFuelType": {
        "type": "string",
        "default": "electric"
      },
      "proposedUef": {
        "type": "number",
        "default": 3.3
      },
      "proposedFuelPrice": {
        "type": "number",
        "default": 0.12
      },
      "electricityRate": {
        "type": "number",
        "default": 0.12
      },
      "annualMaintenanceSavings": {
        "type": "number",
        "default": 0
      },
      "installedCost": {
        "type": "number"
      },
      "incentiveAmount": {
        "type": "number",
        "default": 0
      },
      "projectLife": {
        "type": "number",
        "default": 12
      },
      "discountRatePercent": {
        "type": "number",
        "default": 7
      },
      "energyEscalationPercent": {
        "type": "number",
        "default": 2.5
      }
    }
  },
  "example_inputs": {
    "dailyHotWaterGallons": 50,
    "temperatureRiseF": 70,
    "existingFuelType": "gas",
    "existingUef": 0.64,
    "existingFuelPrice": 1.5,
    "proposedFuelType": "electric",
    "proposedUef": 3.3,
    "proposedFuelPrice": 0.12,
    "electricityRate": 0.12,
    "annualMaintenanceSavings": 0,
    "installedCost": "",
    "incentiveAmount": 0,
    "projectLife": 12,
    "discountRatePercent": 7,
    "energyEscalationPercent": 2.5
  },
  "source_url": null,
  "formulas": [],
  "disclaimer": "Screening estimate only. Verify measurements, assumptions, tariffs, equipment constraints, and applicable requirements before making a project or purchasing decision."
}