Surely you have also noticed it: the energy bill has become one of the biggest concerns in the family budget. Whether because you are going to renovate your house or because your old boiler asks for a renewal plan, you find yourself facing the great current dilemma: aerothermal energy or gas boiler?
It is not just any decision. We are talking about an investment that will determine how much you are going to pay every month for the next 15 or 20 years. In this article we are going to bring both systems down to earth so that you understand, without complications, which of them will better take care of your pocket and your comfort.
Is aerothermal energy or gas boiler better? Key differences
To choose well, first you must understand that these two systems manufacture heat in very different ways.
The traditional gas boiler works by combustion; that is, it burns gas to heat the water in your radiators. It is a direct, powerful and well known system, but it depends on a fossil fuel whose price is volatile.
On the other hand, aerothermal energy is a clean technology that extracts free energy from the outside air (yes, even when it is cold) to acclimatize your house. It is like an air conditioner in reverse that, in addition to heating, can give you hot water.
Here are three key points to differentiate them:
- Space: While a boiler is compact and fits in a kitchen cabinet, aerothermal energy requires an outdoor unit (similar to an air conditioner) and, usually, an indoor water tank.
- Versatility: This is the great advantage of aerothermal energy. It is an all in one system: it gives you heating in winter and cooling in summer, something that the gas boiler simply cannot do.
- Sustainability: Aerothermal energy is considered renewable energy. If you seek to reduce the carbon footprint of your home, it is the winning option.
Cost and profitability comparison: Which is more worthwhile?
When deciding whether aerothermal energy or gas boiler is better, the economic factor is what usually tips the balance. But beware: do not look only at what you pay today, but at what you will save tomorrow.
| Factor | Gas Boiler | Aerothermal Energy |
| Initial investment | Low to Moderate | High |
| Monthly expense | High (depends on gas price) | Very low (high energy efficiency) |
| Maintenance | Mandatory and frequent | Minimum |
| Useful life | 10 to 12 years | 15 to 25 years |
| Performance | Up to 110% (condensing) | Up to 400% or 500% (COP) |
Aerothermal energy requires a more powerful initial investment, but its monthly energy savings are so drastic that, in a few years, the system pays for itself. For every kW of electricity it consumes, it can return up to 4 or 5 kW of heat. In comparison, the gas boiler will always consume energy that you have to pay for in full.
Aerothermal energy with gas boilers: The power of hybrid systems
What if you did not have to choose? There is a very smart intermediate option: aerothermal energy with gas boilers, also known as hybridization. Hybridization consists of installing a heat pump that works most of the time (due to its low consumption) and keeping the gas boiler as a backup system.
- When is it interesting? It is ideal for areas with extreme cold climates. When the temperature drops below minus 5ºC, the aerothermal system has to work harder; at that moment, the boiler kicks in to ensure you are never cold.
- Smart management: The system automatically chooses which energy source is cheaper at all times, automatically optimizing energy savings.
When to choose each system?
To finish clearing your doubts, we have summarized the ideal scenarios for each technology.
When to choose Aerothermal energy?
- Single family homes or villas with outdoor space.
- If you are going to install (or already have) underfloor heating or fancoils.
- If you want to completely eliminate the gas bill from your life.
- If you plan to install solar panels, since the combination is the ultimate savings.
When to keep or install a Gas Boiler?
- Small apartments in buildings where placing machines on the facade is not allowed.
- If you have a very tight initial budget and need an immediate solution.
- Homes with old high temperature radiators where you do not want to carry out a comprehensive reform.
Conclusion: Is aerothermal energy or gas boiler better?
In the end, the answer to whether aerothermal energy or gas boiler is better depends on your type of home, your climate zone and your investment capacity. The gas boiler remains a reliable and economical option to install, but aerothermal energy is, without a doubt, the technology of the future due to its efficiency and respect for the environment.
Both are mature and safe solutions that guarantee you the thermal comfort your family deserves. The important thing is that the decision is based on a real analysis of your consumption.
If you still have doubts, request a personalized energy study for your home and start saving today. You also have more information here if you need it: is aerothermal energy or natural gas better.
