Bioethanol fireplace: stylish, pricey and barely heats

Bioethanol fireplace: stylish, pricey and barely heats

Is a bioethanol fireplace worth it for heating a room without a flue? The figures used in the most detailed analyses of the debate say no: the kilowatt hour comes out at between €0.25 and €0.39, above electricity. Its appeal lies elsewhere. No building work, no pipe, no noise, and it looks good. The problem is that the heat it gives off is, at best, equivalent to two lit candles. And that won't heat a hovel in January.

The calculation that debunks the gadget

The real consumption of these devices is around 0.25 litres per hour, according to the figures shared in the discussion. With the price of bioethanol at around €2.56 per litre —the cheapest found, in 120-litre drums at €306.93— the kilowatt hour shoots up to €0.39. With methanol, things improve: it drops to €0.13 per kilowatt hour if you find it at €0.68 per litre, a price several consider suspiciously low.

The comparison with electricity leaves no room for doubt. The electric kilowatt hour sits at around €0.17, not counting the fixed capacity charge or equipment rental. Even the most optimistic methanol scenario comes in at €0.25 per kilowatt hour. The conclusion that keeps coming up is that this is a purely aesthetic object.

The problem of combustion in enclosed spaces

The absence of a flue is the main selling point and, at the same time, its biggest risk. Any combustion consumes oxygen and releases carbon dioxide. In a closed, oxygen-poor environment, burning produces carbon monoxide, which is toxic. The warning is clear: without ventilation, one day you'll get a nasty scare. The alternative suggested is to install a vent to the outside, which destroys the product's main advantage.

The smell is another point barely mentioned in the product specs. Bioethanol smells bad, according to those who have used it. With burning alcohol, the problem disappears, but another one appears: methanol is toxic and has a high vapour pressure, which increases the risk of flash fire. Storing 25-litre drums at home is considered reckless.

The alternative that actually heats: paraffin and butane

Against bioethanol, the paraffin heater stands out as an option with far more heating power. A 20-litre drum costs about €50 and consumption is around one litre every four hours. With that, an empty 60-square-metre home can be heated to 20 degrees in under an hour, something electricity can't manage. The problem is the constant wick adjustment: if it isn't regulated properly, it smells. And no heater does it automatically.

Subsidised butane is presented as the most competitive alternative without a flue. The catch is the humidity it generates, which forces you to consider a dehumidifier, adding electricity consumption and eating into some of the savings.

The price of bioethanol in Germany and the kilowatt-hour trap

The hope that bioethanol prices will fall rests on the German market, where prices of €1.5 per litre have been seen. With that figure, the fireplace could compete with electricity. But the most recent calculations, with updated data, keep the kilowatt hour at €0.25 in the best-case scenario. The conclusion is that it cannot compete with electricity today.

Methanol, sold as an industrial solvent, improves the numbers. Figures of €17 for 25 litres are mentioned, which works out at €0.68 per litre and a kilowatt hour at €0.13. That's roughly half the calculation made a year earlier, when methanol cost twice as much. At those prices, the alcohol fireplace would start to be competitive even against heating oil. The hassle, though, is enormous: storing drums, refilling the tank daily, lighting and extinguishing it, and a total absence of automatic regulation.

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In the end, the bioethanol fireplace is a decorative object that heats just enough to keep the room from smelling stuffy. The numbers don't add up. But it matches the curtains.