Heat pump calculator

CTC heat pump selection

Building and heating-system data

The selected value is a starting assumption. You can freely change “Specific consumption”.

Existing fuel consumption

Calorific value and boiler efficiency are starting values; refine them using bills, fuel-supplier data or boiler data.

Fuel type Season consumption, Lower heating value, Existing boiler efficiency, %

Fuel also covers hot waterEnable if seasonal consumption also includes water heating.

Fuel energy–

Boiler and system losses–

Heat delivered to building–

Formula: consumption × lower heating value × boiler efficiency.

Heated area, m² Specific consumption, kWh/m² per year

Calculated specific consumption–

Heating system Hot-water users Design outdoor temperature, °C Heating off above, °C Compressor covers down to Electricity price, €/kWh Ground heat output, W/m Max. active borehole, m

Monthly heat and electricity distributionHeat delivered to the building and heat-pump plus heater electricity consumption

HeatElectricity

Hot-water demand is calculated based on the number of people. The monthly split is a climate estimate; electric-heater use is concentrated in the coldest months.

Preliminary calculationFinal equipment selection and ground-loop type—horizontal or vertical—must be confirmed after a detailed assessment of building heat losses and ground conditions.

Heat pump calculator

CTC heat pump selection

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