# Electric Radiant Floor Calculator — Ireland

> Calculate the connected load and a scheduled-use energy scenario for electric resistance floor heating. EUR planning view; stated limitations apply.

Page: https://askcalculators.com/ie/radiant-floor/
Definition: https://askcalculators.com/ie/radiant-floor/definition.json
JSON Schema: https://askcalculators.com/ie/radiant-floor/schema.json
Version: 20.16.0
Maintained by: AskCalculators (software project; not a credentialed reviewer)
Qualified review: pending. Automated checks do not establish professional approval.
Page status: Live
Review status: Pending

## Use
Open the calculator page and enter values. Query-string parameters can restore and bookmark a calculation.
Example: https://askcalculators.com/ie/radiant-floor/?unitSystem=metric&area=12&wattsPerSqm=150&hours=4&days=180&dutyCycle=50&electricityRate=0.2&unitRate=0&laborCost=0&deliveryCost=0&otherCost=0&costMultiplier=1&spreadPercent=15&taxRate=0

## Inputs
- unitSystem: Measurement system; type=select; optional; default=metric; values=imperial|metric
- area: Heated floor area; type=number; required; default=12; min=0.01; max=1000000000000
- wattsPerSqm: Installed electric output, W/m²; type=number; required; default=150; min=1; max=500
- hours: Heating hours per day; type=number; required; default=4; min=0; max=24
- days: Heating days per year; type=number; required; default=180; min=0; max=366
- dutyCycle: Average on-time within scheduled hours; type=percent; required; default=50; min=0; max=100
- electricityRate: Electricity price per kWh; type=money; required; default=0.2; min=0; max=1000000000000
- unitRate: Material price per area unit; type=money; required; default=0; min=0; max=1000000000000
- laborCost: Total labor allowance; type=money; required; default=0; min=0; max=1000000000000
- deliveryCost: Delivery allowance; type=money; required; default=0; min=0; max=1000000000000
- otherCost: Other fixed costs; type=money; required; default=0; min=0; max=1000000000000
- costMultiplier: Material/labor multiplier; type=number; required; default=1; min=0.1; max=10
- spreadPercent: Low/high sensitivity around the entered total; type=percent; required; default=15; min=0; max=100
- taxRate: Explicit tax allowance; type=percent; required; default=0; min=0; max=100

## Outputs
- installedKw: Installed electrical load, kW; format=number
- annualKwh: Modeled annual electricity, kWh; format=number
- annualEnergyCost: Annual energy cost; format=currency
- materialCost: Material cost; format=currency
- laborCost: Labor allowance; format=currency
- deliveryCost: Delivery allowance; format=currency
- otherCost: Other specified costs; format=currency
- tax: Entered tax allowance; format=currency
- low: Low cost scenario; format=currency
- mid: Middle cost scenario; format=currency; primary
- high: High cost scenario; format=currency

## Formula
annual kWh = area × watts per square metre ÷ 1,000 × hours × days × duty fraction.

Inputs are converted to canonical units before evaluating this stated formula.

## Rules
- Empty optional inputs are undefined, not zero.
- Hidden conditional inputs are ignored.
- Do not invent missing required inputs.

Notice: Illustrative defaults are not local quotes or verified legal rules. Dated reference components and user-entered assumptions are explicitly distinguished. Professional review is pending.