Frequently Asked Questions About SunBit

The SunBit heating system typically costs €14,350–22,300 (VAT 0 %) depending on the property's heating capacity needs and equipment choices. The price is in line with other modern heating methods such as geothermal, and the system typically pays for itself in 3–6 years through mining income.

Larger properties are priced individually.

The example price of €14,350 (VAT 0 %) includes the Bitcoin Boiler system, the mining unit, and delivery and installation. Depending on the property, a separate water tank and condenser may also be needed, bringing the price to approximately €18,150 (VAT 0 %).

The installation package typically includes the Bitcoin Boiler, one or two mining units depending on the home's heating needs, a water tank, an outdoor unit (condenser), and delivery and installation. The final package is always tailored to the property.

The income comes from Bitcoin mining: the mining units process transactions on the Bitcoin network and are rewarded in bitcoin for this work. The reward consists of newly created bitcoins and the transaction fees from network activity.

New mining units produce on average around €0.10–0.15/kWh, which covers their electricity costs — the heat is created for free as a byproduct.

Even older units, around 5 years old, have historically still produced around 6–12 cents/kWh depending on market conditions.

SunBit lowers your net heating costs, because you pay for the electricity to produce heat but receive mining income back at the same time.

Calculate your potential savings for your specific property with our calculator.

The mining units consume electricity, but the same amount of energy would go into heating anyway — the difference is that with SunBit, producing heat also generates mining income.

When mining is profitable, the system can be run at full power even when there is no heating demand. In that case electricity consumption rises, but mining income rises more — the more the units run, the more you save. In practice, mining income covers the energy costs of heating in most cases, making heat production free for you.

You buy the system for yourself just like any other heating system, and it heats your home through your water-circulating system exactly like any other water-circulating heating. The difference is that the heat comes from Bitcoin mining: essentially 100 % of the energy the units use is converted into heat, which is directed to heating your home. SunBit handles all the technical remote management for you.

You receive 90 % of the mining income, and SunBit charges 10 % for the remote management service.

No. SunBit handles the installation, upkeep, maintenance, and mining-related remote management for you — you need no experience with Bitcoin. You use the system just like any other heating.

The Bitcoin Boiler suits properties with water-circulating radiators or underfloor heating — for example alongside oil heating or replacing an electric boiler. The solution scales from detached houses to large properties.

On the commercial side it suits properties with continuous heat or hot-water demand, such as spas, hotels, housing companies, industrial halls, greenhouses, and farms. The steadier and larger the heating demand, the faster the system pays for itself.

Yes, and especially well. Instead of selling electricity, you use your surplus energy yourself for mining, which can multiply the compensation from your surplus production by more than five times compared to selling it to the grid.

The Bitcoin Boiler has an estimated lifespan of around 20 years. The mining units typically last 5–8 years, after which it makes sense to replace them.

The reason for replacement is not breakdown but progress: mining units keep improving, and at some point mining with a new unit produces more than keeping the old one running. Replacement is therefore an economic choice, not a necessity.

The Bitcoin Boiler is almost silent — its sound level is comparable to a conventional heating system. The outdoor unit's condenser is comparable in size, appearance, and sound to a standard air-source heat pump's outdoor unit.

In summer, when spot electricity is cheap, the units can be kept at full power and the excess waste heat is blown outside through the condenser.

Alternatively, the system can be run according to heating demand, so that in summer essentially only domestic hot water is heated. The equipment reads the heating demand itself and automatically shuts down the miners when no heat is needed.

The system heats your home regardless of the price of bitcoin — heating is not tied to the market and works like any other heating system. Market conditions only affect the mining income, that is, how quickly the system pays for itself.

If the price of bitcoin rises, mining becomes more profitable and produces more — the payback period can then shorten to 2–3 years at best. If the price falls, income decreases and payback takes longer, but heating works normally the whole time.

You own the system and the mining income yourself (90 % of the income is paid to you).

As a private individual, profit from mining is generally taxed as earned income. You can usually deduct the equipment's electricity costs and make deductions from the equipment's purchase price. As a company, mining profit is taxed under normal corporate tax, standard depreciation can be applied to the equipment, and electricity consumption is deductible.

We are not tax advisors and do not provide binding tax advice. Taxation always depends on your own situation — confirm your own circumstances with the Finnish Tax Administration or your own accountant.

The profitability of mining can easily be defined by comparing the average price of electricity used for mining to the average reward earned from it. Historically, mining has been quite lucrative – around 20–30 cents/kWh. This means that as long as the total electricity cost remained below that return, mining was profitable. SunBit's conservative estimate for mining yield is 10–15 cents/kWh, which is influenced by Bitcoin's price development and the network's hashrate.

For a SunBit customer, however, the current profitability of mining is significantly less critical than it is for a professional miner. A professional miner must shut down their equipment when the yield falls below the cost of electricity. A SunBit customer would buy the same heat anyway, so mining is not an additional expense but a byproduct of heating. The heating works the same way regardless of the Bitcoin price. The mining yield is a bonus that reduces your heating bill – and at best, covers it entirely or even generates a profit.

In the calculator, you can adjust both the Bitcoin price and the hashrate to see how the calculation looks in different scenarios.

Bitcoin mining is a computational process performed by computers that maintains and secures the Bitcoin network and processes its transactions. Miners are rewarded in bitcoin for this work.

The computation wastes no energy: all the electricity the units use is released as heat, which is what makes mining possible to harness for heating.

Hashrate tells you how much computing power there is in the Bitcoin network in total. It is the combined power of every mining device in the world.

The network distributes the yield in proportion to the current computing power. When total network power grows, the share of bitcoin rewards for a single device shrinks. When total power falls, the same device earns more bitcoin. The network adjusts mining difficulty automatically, so that new bitcoin is created at a steady pace regardless of how many people are mining.

Hashrate and the Bitcoin price usually follow each other. When the price rises, mining becomes more profitable and more devices join the network. When the price falls, some miners shut their devices down, total network power drops and mining becomes easier for those who remain. That is why mining can stay profitable even when the Bitcoin price falls.

The income is paid by default in bitcoin, directly to your own Bitcoin wallet. If you don't have a wallet, SunBit helps you create one — the process is quick and simple, and our partner is a Finnish wallet service provider.

For business customers, a model can be tailored where the mined bitcoins are automatically converted to euros and paid directly to a bank account.

Bitcoin is digital money that operates on the internet and is based on blockchain technology. Bitcoin is not owned by any bank or state, but is maintained by a worldwide, distributed network of computers. There is only a certain maximum number of bitcoins, and anyone can send or receive them directly without intermediaries.

In this way, Bitcoin solves the problem where the value and control of money depend on banks and states. Traditional money can be printed more, which lowers its value and raises prices over time. In addition, transfers always require an intermediary that can block or delay them. Bitcoin removes these intermediaries, and its supply cannot be increased centrally — or at all.

What matters for SunBit, however, is that mining Bitcoin produces heat that can be used to heat households and properties.

Read more about Bitcoin on Wikipedia