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Heat Pump, Gas or District Heating Calculator

Compare heat pump, gas heating and district heating on the same heat-demand basis — including running cost, upfront cost, subsidy, carbon buffer and total cost.

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Inputs

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Heat pump, gas heating and district heating are compared on one heat-demand basis. You see annual running cost alongside total cost over the selected period, including upfront cost, subsidy and risk.

Display currencyChoose the currency symbol for entered amounts and results. No exchange-rate conversion is applied.

Annual heat demand (kWh)

Use consumption data, an energy-advice estimate or a heat-load assumption where possible. The same heat basis keeps the comparison fair.

Heat pump: seasonal performance factor (SPF)

SPF is the main efficiency lever. Flow temperature, insulation, heat emitters and hot-water demand can change it substantially.

Heat-pump electricity price ($/kWh)

Enter the expected unit price. Count own solar power only if it is realistically available when heat is needed.

Gas price ($/kWh)

Use your tariff unit price or a cautious scenario for future gas prices.

Gas boiler efficiency (%)

Efficiency accounts for the fact that not every kWh of gas becomes usable heat in the building.

Gas: carbon/risk buffer per year ($)

Optional allowance for carbon cost, price risk or expected additional charges. Use 0 if you want to compare gas without a risk buffer.

District heat price ($/kWh)

Use the unit price from the offer. Fixed fee, connection cost and price-adjustment clauses still need to be read alongside it.

Heat pump: fixed annual cost ($)

For example maintenance, meter charges or fixed tariff components.

Gas heating: fixed annual cost ($)

This may include base fee, maintenance, chimney inspection and recurring service charges.

District heating: fixed annual cost ($)

District-heating offers often include fixed or capacity fees. Enter them realistically because they can matter a lot at lower consumption.

Heat pump: upfront cost before subsidy ($)

Include equipment, installation, heat-emitter changes, hot water, related work and planning where they are part of the offer.

Heat pump: subsidy/grant ($)

Enter only subsidies that appear realistic for your project. The calculator does not check eligibility.

Gas heating: upfront cost ($)

Include boiler, installation, chimney work, hydraulics and required related work according to your scenario.

District heating: connection/upfront cost ($)

Use connection cost, transfer station and conversion cost where they apply in your offer.

Comparison period (years)

A longer period amplifies price and efficiency differences; a shorter period gives the upfront cost more weight.

FAQ

FAQ about Heat Pump, Gas or District Heating Calculator

Which heating system is cheapest in the comparison?

That depends on heat demand, energy prices, efficiency, fixed cost, upfront cost, subsidy and comparison period. The calculator shows the lowest-cost option under your assumptions, not a universal recommendation.

Why is there a carbon/risk buffer for gas?

Gas can be affected by carbon cost, regulation and price changes. The buffer makes that risk visible without claiming a specific future price path.

Why is subsidy entered separately?

Subsidies depend on the building, project, timing and programme. The calculator only includes the amount you enter; it does not check eligibility.

Does this replace heating system planning?

No. Technical feasibility, heat load, hydraulics, flow temperature, grid access, space, noise and subsidy eligibility need a professional check.