Attack Electric Excellent vs. Easy: What's the Difference and Which One to Choose?
Attack Electric Excellent vs. Easy: complete guide to the differences and choosing the right model
When a customer first looks at the Attack Electric category, they will encounter two names: Excellent and Easy. At first glance, it seems simple – one is "excellent" and the other is "easy". But in practice, these are two functionally different products intended for different customers, different types of homes and different requirements for comfort and energy efficiency. After years of working with customers in the field of electric heating, it can be said with certainty that customers who choose a model without knowing these differences will return to it later – either regretting that they bought a too simple boiler, or on the contrary, that they paid extra for features they never used.
This article will cover the differences between the Excellent and Easy series systematically, from hardware through regulation to practical scenarios from real customer cases. At the end, you should be able to know exactly which model suits your situation.
What both series have in common: the foundation on which they are built
Before we get into the differences, it is fair to say what Attack Electric Excellent and Easy have in common – because the foundation is the same and solid.
Both series are electric boilers intended for a water circulation heating system (hydronics). They are not electric convector heaters or direct air heaters – the heating element is immersed in water, which circulates in the system and transfers heat through radiators or floor heating. Both models include a built-in circulation pump, expansion tank and safety valve. Both are approved for the Slovak market, meet the standards for electric boilers and are certified according to European directives.
Both series are installed on the wall (wall-mounted version), have compact dimensions and do not require a chimney or air supply for combustion – this is a given for an electric boiler. Both have a digital control panel with adjustable temperature and both operate within the same range of heating water temperature (usually 20–85 °C depending on the specific model and settings).
That's the common ground. Now to the differences, which are essential.
Excellent series: what distinguishes it and why it exists
The Excellent series is the pinnacle of the Attack Electric range. It is a boiler intended for customers who want a full replacement for a conventional gas boiler – with the same comfort, with power modulation, with the possibility of preparing hot utility water and with a sophisticated regulation. It is available in power variants: Attack Electric Excellent 8 / 7,5 kW, Attack Electric Excellent 15 kW and Attack Electric Excellent 24 / 22 kW.
Power modulation – why it is important
One of the key features of the Excellent series is smooth or multi-stage power modulation. What does this mean in practice? The boiler does not have to run at full power or be turned off – it can work at partial power, continuously adjust the heat production to current conditions and maintain the heating water temperature at an optimal level. For a model with a maximum power of 15 kW, the boiler can easily run at 6–7 kW on a mild autumn day and save electricity.
For comparison: cheaper simple boilers operate on the principle of "on/off" or switch between a few fixed power levels. This leads to cyclic operation, which loads the electrical installation and especially – in systems with floor heating with a large thermal inertia – to temperature fluctuations.
Equithermal regulation and external sensor
Excellent allows connecting an external temperature sensor and setting so-called equithermal regulation (sometimes referred to as "weather-controlled regulation"). The principle is simple: the colder it is outside, the higher the water temperature to the radiators the boiler sets, and vice versa. The boiler thus anticipates the needs of the house before the temperature in the rooms drops.
From practice, it is clear that houses with equithermal regulation achieve 10–15 % lower electricity consumption compared to the same house with a boiler without equithermal regulation, provided the equithermal curve is properly set. This is not a marketing figure – it is a physical reality confirmed by measurements and experienced installers.
Connecting a room regulator via eBUS
Excellent has an eBUS communication bus, via which a compatible room thermostat or weekly program regulator can be connected. The regulator communicates with the boiler digitally – not just as a simple switch (on/off), but as a partner that tells the boiler what room temperature it wants to achieve, and the boiler calculates for itself what water temperature it needs to set.
This function is particularly valuable for floor heating. The floor is a slow system – if the regulator just turns off the boiler when the desired room temperature is reached and turns it on again when the temperature drops, the floor reacts with an hour delay and the room alternates between "hot" and "cold" waves. With an eBUS regulator and properly set boiler, the floor is stably at the right temperature.
Domestic Hot Water (DHW) Preparation
Excellent can be supplemented with DHW Module Set for hot water preparation in an external tank. This module allows the boiler to control the DHW tank heating – either with DHW priority (classic approach, where the boiler first heats the tank and then focuses on heating), or with adjustable priority.
For more information on this topic, see the article "DHW Module for Electric Boiler: How Hot Water Preparation in an External Tank Works?" in this Knowledge Center. Here we only note that without this module and tank, the household would need a separate water heating system – an electric water heater, a heat pump for DHW, or another source. Excellent therefore offers the option of a single center for heating and water heating, which simplifies installation and operation for many customers.
Easy Range: What It Is and Who It Is For
Attack Electric Easy is represented in the range by the model Attack Electric Easy 8 with a power of 8 kW. It is a compact electric boiler with basic equipment – no modulation in the sense of continuous control, no weather compensation, no eBUS, and no possibility to connect a DHW module. It is a boiler intended for simple situations where the customer needs reliable electric heating without unnecessary complexity.
Who Is Easy Ideal For
From practice, we know that Easy is the best choice in these situations:
- Cottage or garden house – seasonal or occasional use, where it is not worth investing in sophisticated regulation. You turn the boiler on at the beginning of the season, set the temperature, and that's it.
- Small apartment or studio – if you have a one- or two-room apartment with an area up to 60–70 m² (well insulated), 8 kW is usually sufficient power and simple control is more of an advantage.
- Backup or supplementary source – Easy is sometimes used as a backup heat source for a heat pump (when the pump is insufficient in extreme cold) or as supplementary heating in part of the house.
- Rental property – if you rent out a property and do not want to complicate things, the simple control of Easy is less prone to incorrect manipulation by tenants.
- Limited budget – Easy is more affordable, and if your situation matches the above-mentioned cases, paying extra for Excellent does not make economic sense.
What Easy Lacks and What It Means in Practice
The absence of power modulation in Easy means that the boiler operates in fixed steps – either full power, one of the lower steps, or off. In practice, this does not matter in small houses or cottages – the thermostat will turn the boiler off when the temperature is reached and turn it on again when it drops. In simple radiator systems, this behavior is quite acceptable.
The absence of weather compensation is also not a problem in situations where the house reacts quickly to temperature changes (small spaces, fast radiators) or where heating is not continuous (a cottage used on weekends).
Where could it be a problem? If you were to use Easy in a family house with floor heating. The floor has a huge thermal capacity and a slow response time – a simple thermostat without weather compensation and without modulation cannot effectively control such a system. In such a situation, we would not recommend Easy.
Detailed technical parameter comparison
For those who like numbers and tables, here is a systematic comparison of key parameters of both series. Please note that exact values may vary depending on the specific model and we recommend always checking the product in the current catalog or technical documentation.
| Parameter | Excellent | Easy |
|---|---|---|
| Available outputs | 8 / 7,5 kW, 15 kW, 22 / 24 kW | 8 kW |
| Power modulation | Yes (multi-stage / continuous) | Stepwise / On-Off |
| Ecothermic regulation | Yes (external sensor) | No |
| eBUS communication | Yes | No |
| Domestic hot water preparation (module) | Yes (with TÚV module) | No |
| TÚV / heating priority | Adjustable | Not available |
| Suitable for floor heating | Yes (recommended) | With reservations / limited |
| Suitable for radiator systems | Yes | Yes |
| Energy efficiency of regulation | High (modulation + ecothermic) | Standard |
| Price (approximate) | Higher | Lower |
Electrical connection: what you need to know before purchase
An electric boiler is one of the most demanding household appliances in terms of electrical installation. Before choosing a model, you must be clear about what your electrical network allows. This is an area where customers often make mistakes.
The Easy 8 kW model operates with three-phase power supply 3×400 V, the current load on each phase is relatively low (about 12 A per phase) – this is usually feasible even in older houses without major reconstruction of the electrical installation, of course after consultation with an electrician and the distribution network operator.
The Excellent 15 kW or 22/24 kW are a different category. At 22 kW, the total consumption is almost 32 A at full power (three-phase), which requires corresponding circuit-breaker protection, cable route at least in the size of 6 mm² (ideally 10 mm²) and sufficient capacity of the connection from the distributor. In many older houses, it will be necessary to agree on increasing the circuit-breaker with the electricity distributor, which can take months. This administrative matter is independent of the boiler selection and must be resolved in advance.
Further practical advice can be found in the article "Installation of Attack Electric boiler: procedure, requirements and connection" in this Knowledge Center – there are details about conductor sizing, circuit-breakers and electricity meter switchboards.
Real-life scenarios from practice: which model do customers choose and why
Scenario 1: 120 m² family house, well insulated, floor heating
This is a classic case for Excellent. A well-insulated house with floor heating has low heat loss (estimated 5–9 kW at an outside temperature of –15 °C), but requires precise regulation. In this case, the customer usually chooses Excellent 15 kW with an external sensor, eBUS controller with a weekly program and possibly a TÚV module, if there is no other source of hot water in the house.
Result: the boiler runs at partial power most of the season (8–11 kW), the temperature in the house is stable, consumption is 10–18 % lower than it would be with a simple On/Off boiler of the same power. The customer returns saying that "the boiler is quiet, you can't even tell when it is running".
Scenario 2: 60 m² cottage, standard masonry building, steel radiators
Here, Easy 8 kW is the ideal choice. The cottage is used from Friday evening to Sunday, the customer has no interest in programmable regulation or ecothermic – he comes, turns the thermostat to 21 °C and in the morning it is warm. Simplicity of control and lower price are priorities. A radiator system with a fast response is suitable for On/Off operation.
Scenario 3: 65 m² two-room apartment in a panel building, renovation
It depends on the state of thermal insulation. In an unrenovated panel building of an old type, heat loss can reach 6–8 kW in the cold, in a well-insulated apartment with new windows it can be 3–4 kW. For both cases, Easy 8 kW would be sufficient in terms of power. The question is whether the customer wants hot water preparation from the boiler – if yes, Excellent is required. If the apartment has a water heater and only heating is needed, Easy is sufficient.
Scenario 4: Older family house 180 m², thermally not insulated, transition from gas
This is a case where you need to be careful. An older, non-insulated house can have a heat loss of 12–16 kW or even more. Easy 8 kW simply does not meet the requirement. The customer needs Excellent 22/24 kW. In addition, such a house without insulation will have higher costs with electric heating – before installing an electric boiler, it is recommended to invest in insulation. The article "What power of electric boiler do I need for my house?" in this Knowledge Center contains a calculation procedure.
Scenario 5: New construction with heat pump, electric boiler as a backup source
In this case, the customer does not need high power or complicated regulation from the electric boiler – the heat pump does 90 % of the work. The electric boiler comes into play only in the event of a pump failure or in extreme cold below –15 °C. Here, Easy 8 kW is again a reasonable choice as an economical backup without unnecessary functions that the customer would never use in backup mode.
Cost considerations: Is it worth paying extra for Excellent?
This is the question customers ask most often. The answer depends on the context. Let's look at a typical example:
The owner of a well-insulated 100 m² family house with floor heating is deciding between Easy 8 kW (lower purchase price) and Excellent 8 kW (higher price). Let's assume that the setpoint modulation and modulation with Excellent will save 12 % of electricity annually. With a consumption of 10,000 kWh/year and an electricity price of 0.18 €/kWh, the annual savings are 216 €. If the price difference between the models is, for example, 400–500 €, the payback period is less than 3 years. After this period, Excellent is cheaper in total costs.
Of course, the calculation depends on specific prices, the condition of the house, the accuracy of regulation settings, etc. For a cabin used 30 days a year, the same calculation will never favor Excellent – the savings are too small and the payback period too long.
If you are interested in this topic in more depth, the article "Regulation and setting of the Attack Electric electric boiler: how to save on electricity?" in this Knowledge Center deals with topics such as time programs, night setback, water temperature and their impact on consumption.
Accessories and expansion modules: what goes with what
Excellent is a modular system – it can be expanded. The base is the boiler itself, but it can be connected to:
- TÚV module set – allows control of an external hot water storage tank. The boiler switches between heating and heating the tank according to set priorities.
- Outdoor temperature sensor – a necessary condition for setpoint regulation. It is usually placed on the north wall of the house, out of direct sunlight and wind.
- eBUS regulator – a room thermostat with digital communication, weekly program and night setback. Different manufacturers offer eBUS compatible regulators.
To the Easy 8, a standard bimetal room thermostat (230 V switch) or a simpler digital thermostat can be connected. More sophisticated accessories from the Excellent ecosystem are not compatible.
Installation: what is different in each series
From the perspective of hydraulic connection, Excellent and Easy are essentially the same – inlet, outlet, filling, bleeding, safety valve, expansion tank. Both are mounted on the wall, both have similar dimensions and weight.
The difference is in the electrical installation and connection of accessories. Excellent requires an electrician with experience in eBUS connections (it is not complicated, but you need to know what you are doing) and if the TÚV module is added, additional wires for tank control must be connected. Easy is simpler in this respect – mains power and optionally one input for a thermostat.
Details on hydraulic and electrical connections are in the article "Installation of the Attack Electric electric boiler: procedure, requirements and connection" in this Knowledge Center.
Warranty and service aspects
Both series have a standard warranty period corresponding to current regulations. From the point of view of serviceability, Excellent is a bit more complex, as it contains more electronics (control board with eBUS interface, modulation, sensors). Easy has simpler electronics, which may mean cheaper repairs in case of failure.
In practice, reliability problems with Attack Electric boilers are rather exceptional with proper installation and regular system bleeding. The most common problem – boiler flooding with air from the system – affects both models equally. The articles "Common faults of Attack Electric electric boilers and how to solve them" and "Maintenance and service of the Attack Electric electric boiler: what and when to check?" in this Knowledge Center cover these topics in detail.
Most frequently asked questions (FAQ)
Can I later upgrade Easy to Excellent if I miss modulation or TÚV?
No, Easy and Excellent are not mutually upgradable. They are different products with different control boards and firmware. If you think you will want a TÚV module or setpoint regulation in a year or two, invest in Excellent from the beginning. Replacing the entire boiler after two years due to missing functionality is expensive and logistically unpleasant.
Is Easy 8 kW suitable for a family house, or only for apartments and cabins?
It depends on the house. For a well-insulated, smaller family house (up to about 80–90 m², low-energy standard), 8 kW may be sufficient in terms of power. For a standard family house without significant insulation and an area of 100 m² or more, 8 kW is usually insufficient power, and the absence of modulation and setpoint regulation worsens comfort and savings. In such a case, we recommend Excellent in a higher power.
Can I connect any thermostat to Excellent, or only a specific eBUS regulator?
Excellent has inputs on the terminal block for a standard thermostat (no-voltage contact) and for an eBUS regulator. You can connect a simple thermostat without eBUS – the boiler will work, but you will lose the benefits of digital communication (modulation via the regulator, displaying the boiler temperature on the regulator, etc.). To fully utilize the potential of Excellent, an eBUS compatible regulator is recommended. A list of compatible regulators should be provided by the seller or service technician.
How noisy is Excellent 15 kW compared to Easy 8 kW in operation?
Both boilers are relatively quiet – the main source of noise is the circulation pump and water flow. Excellent in modulated operation at lower power runs even quieter than at full power. Easy at full power can be slightly louder in terms of water flow, although it is still a very low noise level (<40 dB near the boiler). Neither model is suitable for installation in a bedroom – the recommended installation is in a boiler room, hallway or bathroom.
What happens during a power outage – are the settings preserved?
Excellent with its control electronics preserves the settings in memory even during a power outage (settings are stored in non-volatile memory). After power is restored, the boiler returns to the previous state without the need for re-setting. Easy has simpler electronics – it usually preserves basic settings, but it is advisable to check this in the manual of the specific model.
Is Excellent 22/24 kW worth it for a house where I have significantly oversized electrical power?
It is not a question of available power, but of the actual heat loss of the house. If your house needs only 10 kW, installing a 22 kW boiler is oversized and will result in frequent short-cycle operations. Excellent 22/24 kW models are suitable for large houses (180–250 m² and more), or for houses with large TÚV storage tanks, where the boiler needs to have the capacity to quickly heat a large volume of water. For most family houses up to 150 m², Excellent 15 kW is the right power choice. How to calculate the required power is explained in detail in the article "What power of electric boiler do I need for my house?"
Conclusion: a simple answer to a complex question
If it had to be summarized in one sentence: Easy is for simple situations where you care about low price and simple control; Excellent is for everyone who wants full heating with the comfort of a modern boiler and the potential for energy savings.
In practice, this means: if you heat a cabin, a small apartment or need a backup source, Easy 8 kW will do its job without problems. If you heat a family house, want floor heating, want to control hot water preparation from one place and want a boiler that adapts to the weather and saves you electricity – Excellent is the right choice, despite the higher purchase price.
One more practical tip: customers who are hesitating over the choice sometimes argue that "the installer will somehow set it up". The truth is that even the best installer cannot turn Easy into Excellent. The regulation is determined by the hardware and firmware of the boiler. Choosing the right model before purchase is therefore much more important than any settings after installation.
If you are still in doubt after reading this article, also look at other topics in this Knowledge Center – especially "How to choose an Attack Electric electric boiler: power, model and accessories" and "Electric boiler vs. gas boiler: when is electric heating worth it?" – these articles will help you place your choice in a broader context.
Do you have a question about this topic?
Having trouble deciding or dealing with a specific situation in your home? Write to us - we'll be happy to help.