As the days grow shorter and we seek cosiness indoors, many reach for candles to create a warm atmosphere. The majority of these candles are made from paraffin, a residual product of the petroleum industry that has served as the standard for ambient lighting for decades. While paraffin is practical and inexpensive to produce, there is a growing awareness regarding what actually occurs during combustion in our living rooms. When a candle burns, a chemical process transforms solid wax into gases and particles. If the flame becomes unstable or oxygen is insufficient, substances can be released that affect indoor air. For those striving for a conscious living environment without sacrificing the warmth of a real flame, understanding paraffin is essential. In this article, we examine the properties of this traditional fuel and explain why Tenderflame technology follows a fundamentally different process for creating ambience using a patented steel wick and Tenderfuel.
- Funnel Phase
- Awareness
- Cluster
- Candles
- Technology
- Patented steel wick
- Validation
- KIWA, RISE, TÜV
In short
- Paraffin is a byproduct of oil refining frequently used in candle production.
- Incomplete combustion of wax can release soot and particles into the living space.
- Added perfumes and dyes in paraffin candles can increase the load on indoor air.
- Tenderflame operates without wax, using the non-toxic liquid Tenderfuel instead.
- The steel wick ensures a stable burn without the soot formation typical of candles.
The origin of paraffin and its domestic use
Paraffin is a white or colourless soft solid derived from petroleum, coal, or oil shale. During the crude oil refining process, paraffin remains as a byproduct. Due to its low cost and ease of processing, it has become the primary raw material for the global candle industry. Most households contain candles consisting largely of this fossil fuel. Although it is a stable product at room temperature, its structure changes immediately once the wick is lit. The heat of the flame melts the wax, which is then drawn up through the cotton wick and evaporated. This process of evaporation and subsequent combustion is what sustains the flame. Because paraffin is a hydrocarbon compound, the quality of this combustion is directly dependent on the environment. Factors such as draughts, wick length, and oxygen supply determine how cleanly the flame burns. In a closed room, this can lead to an accumulation of substances, especially when multiple candles burn simultaneously over a long period. It is therefore important to look critically at what exactly we are igniting in our personal living spaces to maintain a pleasant environment.
- Byproduct of the fossil fuel industry
- Melts at relatively low temperatures for easy combustion
- Most common base for pillar candles and tea lights
Combustion products and indoor air influence
In an ideal, complete combustion of a candle, only water vapour and a minimal amount of substances should be released. In practice, however, combustion in a living room is rarely perfect. When a paraffin candle flickers due to a draught or a wick that is too long, incomplete combustion occurs. This is often visible as a thin black wisp of smoke rising from the flame: soot. Soot consists of microscopic carbon particles that remain suspended in the air and eventually settle on furniture, walls, and within our lungs. In addition to soot, volatile organic compounds can also be released when paraffin burns. The intensity of this increases when candles are equipped with synthetic fragrances or dyes, which in turn generate their own byproducts during heating. For individuals with increased sensitivity to air quality, this can lead to irritation. While concentrations during occasional use often remain within limits, daily use in poorly ventilated spaces creates a constant load on the indoor air. Understanding this process is the first step towards a conscious choice for alternatives that preserve the ambience while minimising emissions.
The risks of soot formation and deposition
A common complaint regarding the frequent burning of traditional wax products is the formation of a grey or black haze on ceilings and walls, often referred to as ghosting. This phenomenon is caused by the fine soot particles released when extinguishing the candle or during flickering. Because paraffin is an oil product, these soot particles are often oily in nature, making them easily adhere to surfaces and difficult to remove. Especially in modern, well-insulated homes with mechanical ventilation, these particles can spread quickly throughout the house. Sooting does not stop at visual damage to the interior; it is an indication that combustion is not proceeding optimally. Cotton wicks in paraffin candles must be constantly trimmed to limit sooting, but even with meticulous maintenance, the source of the flame remains a fossil wax that inevitably emits particles when heated. For those who value a clean interior and a fresh environment, moving to a system without melting wax represents a logical solution to counteract this specific form of pollution without sacrificing the cosiness of a living flame.
- Oily soot deposits on walls and ceilings
- Particulate matter concentration rises during incomplete combustion
- Wicks require constant maintenance to prevent smoking
Why Tenderflame uses no wax
Tenderflame has chosen a fundamentally different approach to creating ambient light. Unlike traditional candles or bio-ethanol fireplaces, Tenderflame does not use a flammable liquid or solid wax that can catch fire as a whole. The heart of the system is the patented steel wick. This stainless steel wick is designed so that it only burns in direct combination with Tenderfuel. Because there is no melting wax or consuming cotton wick, there is no soot formation as we know it from paraffin. The combustion is exceptionally clean and stable, resulting in a flame that does not smoke or sputter under normal conditions. The choice of a steel wick also means that the flame maintains the same height and intensity without the user needing to trim the wick. Consequently, the emission of unburned particles is kept to a minimum. This technological difference ensures that the experience of a real flame is preserved, while the disadvantages of traditional petroleum products like paraffin are entirely bypassed through a clever design and a specific fuel combination that requires no manual wick adjustment.
Safety and classification of Tenderfuel
A crucial aspect of Tenderfuel is the classification of the liquid itself. While many liquid fuels for ambient fireplaces, such as bio-ethanol, are highly flammable and potentially dangerous if spilled, Tenderfuel is not classified as flammable. The liquid only burns when it comes into contact with the steel wick that has been heated to a specific temperature. Outside of this configuration, nothing happens, which makes spilling fuel during filling significantly safer. Furthermore, Tenderfuel is not classified as toxic. It has been extensively tested by renowned institutions such as KIWA, the Swedish RISE, and the German TÜV. These tests confirm that the fuel is safe for use and storage. Because the fuel is not dangerous to the skin and does not emit harmful vapours at room temperature, it offers a reassuring alternative to both paraffin and traditional alcohol fuels. The system is specifically designed to minimise the risks associated with open fire in the home, with an emphasis on a controlled reaction between the fuel and the patented stainless steel components, providing peace of mind during use.
- Not classified as flammable or toxic
- Tested by KIWA, RISE, and TÜV
- Safe to store and handle at home
The importance of ventilation for indoor burning
Every process that consumes oxygen to produce a flame requires a form of air exchange. This applies to candles, open fireplaces, and also to Tenderflame. Although Tenderflame burns much cleaner than paraffin due to the use of Tenderfuel and the steel wick, the flame still consumes oxygen from the room. Therefore, it is essential to always consult the manual of the specific model for correct placement and usage instructions. Good basic ventilation is necessary to maintain a healthy living environment. In modern, airtight homes, this often means that a ventilation grille should be open or a window should be slightly ajar. Compared to paraffin candles, which quickly soot and emit harmful substances when oxygen is lacking, the Tenderflame flame remains more stable. However, the laws of physics remain in effect: combustion requires fresh air. By acting responsibly with ventilation and following the instructions provided in the model-specific guide, you create an environment where you can optimally enjoy the warmth and atmosphere without the air quality being unnecessarily affected by a lack of supply or stagnant air.
Maintenance and preventing sputtering
To ensure the cleanest burning experience, minimal maintenance of the Tenderflame system is required. A known phenomenon is the so-called sputtering or popping of the flame. This occurs when the Tenderfuel in the reservoir has not been used for a longer period and has absorbed moisture from the ambient air. When this moisture is heated, small steam particles are created that can make a popping sound. Although this is harmless, it can disturb the quiet atmosphere. To prevent this, we advise letting the fuel burn off completely or closing the reservoir with the included snuffer when the device is not in use. Should moisture have entered the fuel, the old liquid can easily be removed and replaced with fresh Tenderfuel. The old fuel can be safely poured down the drain. It is important when relighting to also pour a small amount of liquid directly over the steel wick. This ensures a smooth start to the combustion. By following these simple steps, the flame remains controlled and odourless, which is a significant difference from the sooty and smoky residues that an extinguished paraffin candle often leaves behind.
- Use the snuffer to minimise moisture absorption
- Sputtering is caused by harmless water vapour
- Easy maintenance by refreshing the fuel
Frequently asked questions
Should I be concerned about substances released from paraffin?
With occasional use and good ventilation, the risks are limited. However, paraffin is a petroleum product and incomplete combustion releases soot and particulate matter. For those with sensitive airways or those who burn ambient light daily, the cumulative emission of soot particles can have an adverse effect on indoor air quality. Tenderflame offers a cleaner alternative without wax emissions.
Why is Tenderfuel different from liquid paraffin?
Tenderfuel is not an oil, nor is it bio-ethanol. It is a specially developed liquid that is non-toxic and not readily combustible. While liquid paraffin catches fire easily and produces soot during combustion, Tenderfuel only burns on the patented steel wick. This makes the combustion much more complete and ensures no harmful soot particles are released into the living room.
How do I prevent soot stains on my walls from candles?
Soot stains are caused by flickering flames and extinguishing wax wicks. You can limit this by keeping wicks short and avoiding draughts. A permanent solution is switching to Tenderflame; since this system uses no wax and the steel wick does not consume itself, there is no oily soot formation characteristic of paraffin during normal operation.
Is the smell of burning paraffin harmful?
The typical candle smell often comes from volatile substances and synthetic perfumes in the wax. While not directly toxic in small quantities, these substances can load the air quality. Tenderflame burns odourless and neutral because the combustion on the steel wick is very efficient. This keeps the air in the house fresh, even after hours of use.
Can I use Tenderfuel in my old oil lamps?
No, absolutely not. Tenderfuel is specifically developed to work exclusively with the patented steel wick from Tenderflame. In a regular oil lamp with a cotton wick, Tenderfuel will not burn because the temperature of a cotton wick is not high enough to ignite the liquid. Use Tenderfuel only in the designated Tenderflame models to ensure safety and functionality.
Switch to a cleaner flame.
Enjoy the warmth and atmosphere of a real flame without the disadvantages of paraffin smoke or soot formation.
