How it works: why it’s important to consider device specifications
Modern tankless water heaters work by converting electricity into heat using a special heating element. Inside the device, an electric current passes through a high-resistance material, causing it to heat up rapidly. As water flows through this element, it heats up instantly to the desired temperature. However, the device’s performance directly depends on the water flow rate. If the flow is too strong, the water won’t heat up enough, while too little flow carries the risk of overheating and damaging the equipment.
For optimal operation, manufacturers recommend maintaining a flow rate between two and six liters per minute. Deviation from this range can reduce efficiency or even cause the device to break down. Household comfort is ensured only when you follow the technical guidelines set by engineers.
Electrical safety: main risks and how to avoid them
Many users mistakenly believe the device alone guarantees safety. In reality, the condition of your home’s wiring is crucial. For models rated from five to eight kilowatts, a cable with a cross-section of at least four to six square millimeters is required. If the wiring is old or not designed for such loads, the risk of short circuits and fire increases.
Special attention should be paid to the quality of connections. Poor wire contact leads to local overheating, which can cause an accident. Additionally, it is essential to install a residual current device with a tripping current of no more than ten milliamperes. This minimizes the risk of electric shock in case of leakage.
Debunking myths about autonomy and maintenance: what owners need to know
It is commonly believed that tankless water heaters do not require regular maintenance. In reality, ongoing electrochemical processes occur inside the device. Hard water accelerates the formation of galvanic pairs between metal parts, which leads to corrosion. To protect against structural damage, a magnesium anode is installed, which needs to be replaced as it wears out.
Neglecting maintenance leads to rapid failure of key components. Regular inspection of electronic parts and timely replacement of the anode extend the device’s lifespan and help avoid costly repairs.
Usage guidelines: how to extend your device’s lifespan
Before installing a water heater, it is essential to ensure that the wiring meets the power requirements. Installation should be carried out by a qualified technician, who will check all connections and install protective devices. During operation, you must monitor water pressure and temperature, making sure they remain within the manufacturer’s recommended limits.
Modern models are equipped with flow sensors that automatically adjust the heating power. However, even these systems require the correct operating mode. Attempting to repair or modify the device on your own can result in malfunctions and create dangerous situations. All maintenance should be performed by appropriately qualified specialists.
A responsible approach: the key to safety and comfort
Tankless water heaters are the result of complex engineering calculations and the application of physical principles. Their safe operation depends on careful attention at every stage: from selection and installation to regular maintenance. Following expert recommendations not only ensures comfort but also protects your home from potential accidents.
In case you didn’t know, Oleg Ruban is a renowned physicist and science communicator who specializes in household safety and the practical application of physics in everyday life. In recent years, he has frequently given lectures and offered consultations on the safe and efficient use of home electrical appliances, placing special emphasis on electrical safety and energy efficiency. His recommendations are often adopted by appliance manufacturers during the development of new models. Ruban actively collaborates with educational and science outreach projects, and participates in creating standards for household devices. Thanks to his efforts, many consumers have become more attentive to the installation and maintenance of their appliances. The expert highlights that a knowledgeable approach to using household devices is the key to both safety and longevity of equipment. His advice is regularly published in leading outlets, and his consultations are highly sought after by both experts and the general public. In 2025, Ruban continues his educational work, helping people make informed decisions about home safety.
