{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$id": "https://askcalculators.com/uk/energy-audit/schema.json",
  "title": "Home Energy Audit Savings Calculator — United Kingdom inputs",
  "description": "Evaluate an audit recommendation using a specified reduction in energy spending. The Irish optional baseline uses Electric Ireland EnergySaver 14 DD/online-bill tariff variants with separately dated PSO periods, not a national average or a future-price guarantee. GBP planning view; stated limitations apply.",
  "type": "object",
  "properties": {
    "annualEnergyCost": {
      "title": "Manual baseline: annual energy spending",
      "type": "number",
      "description": "Illustrative starting value; replace with your own evidence.",
      "default": 2400,
      "minimum": 0,
      "maximum": 1000000000000,
      "x-step": 0.01,
      "x-prefix": "GBP",
      "x-unit": "currency"
    },
    "savingPercent": {
      "title": "Audit-supported variable-spending reduction assumption",
      "type": "number",
      "description": "Illustrative starting value; replace with your own evidence.",
      "default": 20,
      "minimum": 0,
      "maximum": 100,
      "x-step": 0.1,
      "x-unit": "percent"
    },
    "projectCost": {
      "title": "Project price",
      "type": "number",
      "description": "Illustrative starting value; replace with your own evidence.",
      "default": 5000,
      "minimum": 0,
      "maximum": 1000000000000,
      "x-step": 0.01,
      "x-prefix": "GBP",
      "x-unit": "currency"
    },
    "incentive": {
      "title": "Confirmed eligible incentive",
      "type": "number",
      "description": "Illustrative starting value; replace with your own evidence.",
      "default": 0,
      "minimum": 0,
      "maximum": 1000000000000,
      "x-step": 0.01,
      "x-prefix": "GBP",
      "x-unit": "currency"
    },
    "extraMaintenance": {
      "title": "Additional annual maintenance",
      "type": "number",
      "description": "Illustrative starting value; replace with your own evidence.",
      "default": 0,
      "minimum": 0,
      "maximum": 1000000000000,
      "x-step": 0.01,
      "x-prefix": "GBP",
      "x-unit": "currency"
    },
    "years": {
      "title": "Analysis years",
      "type": "number",
      "description": "Illustrative starting value; replace with your own evidence.",
      "default": 15,
      "minimum": 1,
      "maximum": 50,
      "x-step": 1,
      "multipleOf": 1
    },
    "discountRate": {
      "title": "Discount rate",
      "type": "number",
      "description": "Illustrative starting value; replace with your own evidence.",
      "default": 4,
      "minimum": 0,
      "maximum": 50,
      "x-step": 0.1,
      "x-unit": "percent"
    }
  },
  "required": [
    "annualEnergyCost",
    "savingPercent",
    "projectCost",
    "incentive",
    "extraMaintenance",
    "years",
    "discountRate"
  ],
  "additionalProperties": false,
  "x-askcalculators": {
    "version": "20.16.0",
    "calculatorUrl": "https://askcalculators.com/uk/energy-audit/",
    "queryExample": "https://askcalculators.com/uk/energy-audit/?annualEnergyCost=2400&savingPercent=20&projectCost=5000&incentive=0&extraMaintenance=0&years=15&discountRate=4",
    "migrationStatus": "new",
    "reviewStatus": "pending",
    "pageStatus": "live",
    "workStatus": "pending",
    "formula": {
      "expression": "Annual net saving = eligible variable energy spending × reduction fraction − additional maintenance. Fixed standing charges and PSO are not reduced by a consumption-saving percentage.",
      "note": "Inputs are converted to canonical units before evaluating this stated formula."
    },
    "quality": {
      "availability": "live",
      "technicalReviewRecord": "/reviews/v20-uk-energy-audit.json",
      "qualifiedReview": "pending",
      "qualifiedReviewer": null,
      "qualifiedReviewDate": null,
      "formulaVersion": "20.16.0",
      "referenceCoverage": "references-listed",
      "releaseTestScope": "Catalog and regression checks are not a professional formula audit; consult release evidence.",
      "historicalMetadataDate": "",
      "historicalMetadataNotice": "The imported date is not evidence of a completed human review."
    },
    "outputs": {
      "baselineCost": {
        "title": "Entered or modeled baseline annual spending",
        "type": "number",
        "x-format": "currency",
        "x-currency": "GBP",
        "x-digits": 2
      },
      "fixedCost": {
        "title": "Tariff standing charge and PSO, not reduced by energy efficiency",
        "type": "number",
        "x-format": "currency",
        "x-currency": "GBP",
        "x-digits": 2
      },
      "capital": {
        "title": "Net capital cost",
        "type": "number",
        "x-format": "currency",
        "x-currency": "GBP",
        "x-digits": 2
      },
      "annualSaving": {
        "title": "First-year net saving",
        "type": "number",
        "x-format": "currency",
        "x-currency": "GBP",
        "x-digits": 2
      },
      "payback": {
        "title": "Simple payback, years",
        "type": "number",
        "x-format": "number",
        "x-digits": 2,
        "x-primary": true
      },
      "npv": {
        "title": "Discounted net value",
        "type": "number",
        "x-format": "currency",
        "x-currency": "GBP",
        "x-digits": 2
      }
    }
  }
}