Energy Saving Tip

5 min read

The heating question of the 2020s comes down to three words: heat pump or boiler? If you're replacing your heating system or upgrading for energy efficiency, you're probably staring at two bills and wondering which path saves you money. The truth is more nuanced than "heat pump good, gas bad." Heat pumps cost more upfront, but run cheaper than gas boilers. Gas boilers are cheaper to install, but every winter you'll pay more to heat your home. This article breaks down the real 2026 numbers so you can decide which system makes sense for your home and budget.

Heat Pump vs Gas Boiler: The Cost Snapshot

Let's start with the elephant in the room: heat pumps cost a lot more to install. You're looking at EUR 8,000-15,000 for a typical air source heat pump system, while a gas boiler runs EUR 2,500-4,000. That's a EUR 5,500-11,000 gap. But here's where it gets interesting: your running costs flip. A heat pump costs EUR 800-1,200 per year to heat a typical 100m² home, while gas costs EUR 1,400-2,000. Over a decade, that EUR 200-800 annual saving compounds into real money. Add government grants (EUR 5,000-8,000 in most EU countries), and the upfront gap shrinks to almost nothing.

Installation Costs: Why Heat Pumps Are Expensive

Heat pump installation is complex. You need outdoor and indoor units, refrigerant pipework, electrical upgrades (sometimes a 3-phase supply), and integration with your heating system. Here's what goes into the price:

Gas boilers, by contrast, are straightforward: remove the old boiler, install the new one, adjust the flue. A standard condensing boiler installation takes 4-6 hours and costs EUR 1,500-3,000 in labor plus EUR 1,000-1,500 for the boiler itself.

Running Costs: Where Heat Pumps Win

Let's assume your home needs 10,000 kWh of heat per year (typical for a 100-120m² property in Central Europe). Here's what you'll pay:

graph LR A[10,000 kWh Heat Needed] --> B{Heating System} B -->|Heat Pump
COP 3.5| C[2,857 kWh Electricity] B -->|Gas Boiler
90% Efficiency| D[11,111 kWh Gas] C -->|at EUR 0.28/kWh| E[EUR 800] D -->|at EUR 0.10/kWh| F[EUR 1,111] E --> G[Heat Pump Wins] F --> H[Gas Still Cheaper]

The math is simple but powerful. A heat pump with a COP (Coefficient of Performance) of 3.5 means it generates 3.5 kWh of heat for every 1 kWh of electricity it uses. A gas boiler at 90% efficiency needs 11,111 kWh of gas to deliver that same 10,000 kWh of heat. Electricity in the EU costs around EUR 0.25-0.30 per kWh (2026 rates, variable by country). Natural gas costs around EUR 0.08-0.12 per kWh. This means: Heat pump cost: 2,857 kWh × EUR 0.28 = EUR 800 Gas boiler cost: 11,111 kWh × EUR 0.10 = EUR 1,111 Annual saving with heat pump: EUR 311 Over 12 years (typical payback period), that's EUR 3,732 in savings—which nearly covers the EUR 5,500-11,000 installation premium.

The Real Payback Period

Payback period is the moment when cumulative savings equal the upfront cost difference. It's not instant, but it's shorter than you might think, especially with government grants.

This is crucial: most EU countries offer grants of EUR 5,000-8,000 for heat pump installation. Germany's KfW program offers up to EUR 7,500, the UK's Boiler Upgrade Scheme offers EUR 5,000. Poland, Czech Republic, and Slovakia all have government programs. These grants drastically cut the payback period from 15 years to 2-3 years or even zero.

How Heat Pump Efficiency Works

Heat pump efficiency is measured by COP (Coefficient of Performance), not percentage. This confuses people. A gas boiler at 95% AFUE (Annual Fuel Utilization Efficiency) sounds good, but a heat pump with COP 3.5 is fundamentally more efficient because it moves heat instead of generating it.

Think of it this way: a gas boiler is like lighting money on fire—you burn fuel to create heat. A heat pump is like moving heat from outside into your home, using electricity as the tool. At temperatures above -15°C (common in Central Europe), a heat pump is always more efficient thermodynamically.

Even in deep winter, a heat pump is still twice as efficient as a gas boiler. This is thermodynamic law, not marketing hype. The "2.3 to 3.5 times more efficient" claim you hear is real—not the exaggerated "35 times" sometimes quoted online.

Electricity Tariffs: The Hidden Cost

Here's a secret most heat pump salespeople won't tell you: if you switch to a heat pump, your electricity tariff matters enormously. Standard consumer tariffs (EUR 0.25-0.30/kWh) make sense. Economy tariffs (EUR 0.12-0.18/kWh) during off-peak hours make heat pumps even cheaper. Time-of-use tariffs that charge EUR 0.08/kWh at night and EUR 0.40/kWh during peak hours require smart scheduling.

Many EU electricity suppliers offer heat pump tariffs—lower rates during off-peak hours specifically because heat pumps can store heat in a tank during cheap hours and use it during expensive hours. If you're considering a heat pump, check with your supplier whether they offer reduced rates. In some cases, a dedicated heat pump tariff (EUR 0.16-0.20/kWh) can reduce running costs by another 30%.

graph TD A[Heat Pump Running Cost] --> B{Electricity Tariff} B -->|Standard Tariff
EUR 0.28/kWh| C[EUR 800/year] B -->|Heat Pump Tariff
EUR 0.16/kWh| D[EUR 457/year] B -->|Economy Night Rate
EUR 0.12/kWh| E[EUR 343/year] C --> F[35% saving vs gas] D --> G[59% saving vs gas] E --> H[69% saving vs gas]

The tariff choice can swing your savings from EUR 311/year (standard tariff) to EUR 768/year (heat pump tariff). That changes the payback period from 20 years to 8 years.

Maintenance and Lifespan

Maintenance costs are similar between systems, but heat pumps last longer.

Over 20 years, a heat pump's higher reliability means fewer repairs and a lower total cost of ownership. A gas boiler, replaced every 13 years, costs two boiler replacements versus one heat pump. That's another EUR 5,000+ in favor of the heat pump.

Government Grants and Incentives

This is the game-changer. Most EU countries now offer substantial grants for heat pump installation, treating them as critical climate infrastructure. Here's what's available (2026):

Check your local government energy efficiency programs. Many also offer interest-free loans on top of grants, making the upfront cost negligible. A EUR 10,000 heat pump installation with a EUR 6,000 grant and a EUR 4,000 zero-interest loan over 5 years costs nearly nothing per month.

When Gas Boilers Still Make Sense

Heat pumps aren't universally better. Gas boilers are still the right choice in these scenarios:

Real-World Savings Example

Let's walk through a concrete example: a 110m² apartment in Prague with annual heating demand of 12,000 kWh (typical for Central Europe).

After payback, the heat pump saves EUR 645 per year forever. Over the next 5 years (25 years total), the grant-assisted installation saves EUR 3,225 (5 years × EUR 645 minus payback period). The decision becomes clear: heat pump wins.

FAQ: Heat Pump vs Gas Boiler Costs

Assessment: Is a Heat Pump Right for You?

What's your annual heating demand?

What's your local electricity cost vs gas cost?

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The Verdict: What You Should Do

Heat pumps cost more upfront but pay for themselves through energy savings over 8-15 years. With government grants, payback shrinks to 3-5 years. Gas boilers are cheaper to install but more expensive to run, especially if electricity tariffs fall (as they're projected to by 2030). The decision boils down to three questions: 1. Can you afford the upfront cost (EUR 8,000-15,000 or EUR 2,000-7,000 with grants)? 2. Will you stay in your home for 10+ years to recoup savings? 3. Are you serious about reducing your carbon footprint? If you answer yes to all three, heat pump wins. If you rent, have minimal capital, or plan to move within 5 years, gas boiler still makes financial sense.

One final point: the energy transition is accelerating. New gas boiler installation is being phased out in many EU countries by 2030-2035. If you install a gas boiler now, you may face retrofit costs in a decade. A heat pump installed today future-proofs your home for the next 20 years.

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Dr. Tomas Horvath, PhD
Dr. Tomas Horvath, PhD

Environmental engineer.

The EnergyVision Team combines energy engineers, data scientists, and sustainability experts dedicated to helping households and businesses reduce energy costs through AI-powered insights and practical advice....