{
  "provider": {
    "name": "CalculateEnergySavings.com",
    "source_url": "https://calculateenergysavings.com/",
    "terms_url": "https://calculateenergysavings.com/api-terms/",
    "terms_version": "2026-08-25"
  },
  "id": "packaged-rtu",
  "name": "Packaged Rooftop Unit Replacement Savings Calculator",
  "description": "Compare packaged-unit cooling energy at equivalent capacity, seasonal efficiency, and operating hours.",
  "status": "published",
  "callable": true,
  "version": "1.0.0",
  "url": "https://calculateenergysavings.com/calculators/packaged-rtu/",
  "methodology_url": "https://calculateenergysavings.com/calculators/packaged-rtu/#methodology",
  "api_url": "https://calculateenergysavings.com/api/v1/calculators/packaged-rtu",
  "calculate_url": "https://calculateenergysavings.com/api/v1/calculators/packaged-rtu/calculate",
  "input_schema": {
    "type": "object",
    "additionalProperties": false,
    "properties": {
      "tons": {
        "type": "number",
        "default": 20,
        "title": "Cooling capacity",
        "x-unit": "tons"
      },
      "existingEer": {
        "type": "number",
        "default": 9,
        "title": "Existing EER",
        "x-unit": "Btu/Wh"
      },
      "proposedEer": {
        "type": "number",
        "default": 12,
        "title": "Proposed EER",
        "x-unit": "Btu/Wh"
      },
      "hours": {
        "type": "number",
        "default": 1800,
        "title": "Equivalent full-load hours",
        "x-unit": "hrs/year"
      },
      "electricityRate": {
        "type": "number",
        "default": 0.12
      },
      "demandCharge": {
        "type": "number",
        "default": 0,
        "title": "Demand charge",
        "x-unit": "$/kW-month"
      },
      "demandMonths": {
        "type": "number",
        "default": 6,
        "title": "Demand months",
        "x-unit": "months/year"
      },
      "installedCost": {
        "type": "number"
      },
      "incentiveAmount": {
        "type": "number",
        "default": 0
      },
      "annualMaintenanceSavings": {
        "type": "number",
        "default": 0
      },
      "projectLife": {
        "type": "number",
        "default": 15
      },
      "discountRatePercent": {
        "type": "number",
        "default": 7
      },
      "energyEscalationPercent": {
        "type": "number",
        "default": 2.5
      }
    }
  },
  "example_inputs": {
    "tons": 20,
    "existingEer": 9,
    "proposedEer": 12,
    "hours": 1800,
    "electricityRate": 0.12,
    "demandCharge": 0,
    "demandMonths": 6,
    "installedCost": "",
    "incentiveAmount": 0,
    "annualMaintenanceSavings": 0,
    "projectLife": 15,
    "discountRatePercent": 7,
    "energyEscalationPercent": 2.5
  },
  "source_url": "https://www.energy.gov/cmei/femp/energy-and-water-management-software-tools",
  "formulas": [
    "Input kW = tons × 12 ÷ EER.",
    "Annual energy = input kW × equivalent full-load hours."
  ],
  "disclaimer": "Screening estimate only. Verify measurements, assumptions, tariffs, equipment constraints, and applicable requirements before making a project or purchasing decision."
}