# Heat Pump Sizing Calculator — Ireland

> Translate an already assessed design load into a manufacturer-rating requirement at the local cold-weather performance point. EUR planning view; stated limitations apply.

Page: https://askcalculators.com/ie/heat-pump-sizing/
Definition: https://askcalculators.com/ie/heat-pump-sizing/definition.json
JSON Schema: https://askcalculators.com/ie/heat-pump-sizing/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/heat-pump-sizing/?unitSystem=metric&designHeatLoss=8&coolingLoad=4&coldCapacityRetention=75&designMargin=5&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
- designHeatLoss: Professionally assessed design heat loss; type=number; required; default=8; min=0.01; max=1000000000000
- coolingLoad: Assessed design cooling load; type=number; required; default=4; min=0; max=1000000000000
- coldCapacityRetention: Rated heating capacity retained at local design temperature; type=percent; required; default=75; min=0; max=100
- designMargin: Explicit design allowance; type=percent; required; default=5; min=0; max=50
- unitRate: Material price per kW of rated thermal capacity; 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
- requiredKw: Required rated heating capacity; format=number; primary
- selectedKw: Larger heating/cooling capacity requirement; format=number
- tons: Cooling-equivalent refrigeration tons; format=number
- 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
rated heating capacity = design heat loss × (1 + allowance) ÷ capacity retained at design temperature.

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.