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What You Need to Know About an Electric Heater Electric heaters can provide warm air quickly when required. They are typically rated according to the size of the room and have features such as thermostats, an overheat switch and timers. Electric heaters convert electrical energy into joule heating. The heating element is composed of the nichrome wire as well as ceramic insulators. Resistor The resistor is an electrical component that impedes the flow of current in circuits by reducing its voltage and absorbing some of it as heat. It transforms electrical energy into thermal that is discarded in one watt. This process is found in many electrical light bulbs and heating elements. The thickness, material and other characteristics of the resistor determine its resistance. It is crucial to remember that the higher the resistor's resistance, the greater energy it can dissipate. This is because higher resistances generate more electrons, and more collisions. The more collisions that occur, the greater the temperature. In general resistors have an maximum power rating they can safely dissipate, which is usually somewhere between 1/8W (0.125W) and 1W. Resistors that have a high power rating can be recognized by their larger packaging. The maximum power rating of a resistor could be deduced from the packaging it comes in or by comparing its physical dimensions to other resistors that have an established power rating. Electric heaters are specialized types of power resistors made to convert electrical energy into warmth. They produce convective heat through the circulation of air around the resistor or radiant heat by emitting infrared radiation. They are often employed in conjunction with fans to boost the efficiency of heating. If the maximum power rating of the resistor is exceeded, it will heat up. This could cause damage to other components. In extreme cases, it may even reach a point of self-ignition and cause an explosion. To prevent this, it is recommended that a resistor is installed to limit the current. The heater resistors are identified with a color code that indicates its value, along with other information, like manufacturing accuracy and temperature coefficient. For example, a six-banded resistor will have the first five bands that reveal its digits, and then the sixth band tells you its multiplier and tolerance. If you'd like to calculate the value of your resistor, there are a variety of online calculators to use. Coil Electric heating coils are at the center of any electrically powered device which makes use of heat to heat liquids or objects. These heaters convert electricity to heat by a process called conduction, and they can be formed into a variety of shapes depending on the application. Electric heating coils also generate a significant amount of heat in a short amount of time, which makes them ideal for applications that require rapid temperature changes or high thermal efficiency. The core of an electric heating coil is an intricately wound structure made of wires made of metal. This structure is tightly packed, allowing for the most wires to fit into an area of a smaller size, thus increasing conductivity. The coil can be protected in a variety ways, based on the purpose. For instance, the insulation of an electric heater used for liquid immersion can be made of a non-flammable material such as polyvinyl chloride (PVC), polyester, or polyimide, while a coil used in cryogenic applications is usually insulated with molybdenum disilicide. In addition to providing protection against the elements, these materials also provide resistance to corrosion and oxidation, making them ideal for a wide range of industrial applications. Stainless steel is the most common element for a heater coil, but nickel-chrome and iron-chromium-aluminum alloys are also commonly used. These alloys offer a great choice for balancing cost, corrosion resistance and resistance to oxidation. Metals in a heating element are exposed to extreme temperatures and harsh environments. blog must be protected. This protection includes sealants and coatings, better drainage and ventilation, regular maintenance and inspections. Moisture ingress is a different issue that needs to be addressed because it can cause damage to the internal elements of a heater and decrease its life expectancy. Coils can also be used in other devices, such as ovens, furnaces, and water tanks. They can be made into a variety of shapes to meet the requirements of the and are typically printed on substrates such as aluminum 6061-T6, muscovite or phlogopite mica sheets, or conductive plastic. They can be coated with a variety of materials to improve their appearance and performance, including gold, silver and nickel. Thermostat While you probably don't think about it often, your thermostat is a crucial element of your home's comfort system. The thermostat's main function is to turn the heater ON and OFF to ensure that it can maintain your preferred temperature setting. It can also adjust the temperature according to your daily routine. This is great for those with an unpredictable schedule. The most popular type of thermostat is the electronic digital model that you can program through the smartphone app or computer interface. Some of the latest models include a learning function that automatically adapts to your personal preferences and you won't have to wonder what time you're supposed to be home for dinner. In older thermostats without digital the electrical circuit was controlled by a bi-metal coil, or metal strip that would expand or contract depending on the temperature. When the strip expanded or contracted it was tipped by a mercury switch, activating the relay which turned on the heating. As the strip cooled it bent backwards and then snapped back to its original position. This shut off the heating. Modern electronic thermostats are more precise than electromechanical ones, which use the use of a temperature sensor and a tiny relay. However, it's still possible to understand the mechanics of an electromechanical thermostat by examining its components. A thermometer coil with mercury inside is one of the most crucial components. When you pull the lever of the thermostat up or down, it rotates the coil and tilts the mercury switch one way or the other. If the mercury switch tips to the left the current flows through it and energizes the relay that turns on the heater. However, as the room gets hotter, the mercury shifts to the right and breaks the circuit, so that the heater shuts off. As electric wood burners down the mercury reverts to its original position. The heater then turns on. If you continue to change the temperature on your electronic thermostat, the system may have to work overtime to keep up with your ever-changing preferences, causing it to use up more energy than it has to. Timer A wall heater timer is an efficient device that allows you to schedule your heating and lighting. Unlike traditional manual timers, it is equipped with a built-in timer that will automatically activate and turn off your lights or heaters at the scheduled time. It can also save you money on your energy costs by preventing unnecessary use. They are typically utilized in homes however, they can also be found in commercial and industrial facilities. By controlling when circuits are turned on and off, they offer convenience, energy efficiency, and security. blog can be connected to appliances such as water pumps, lights, and ovens. They are a great choice for those who want to manage their electrical appliances without the need for a sophisticated programming system or computer. You can set a timer switch by connecting it to an outlet or extension cord. Connect the appliance you wish to control. Depending on the model, you can also connect several devices simultaneously. Some models have the socket located in the middle of the timer whereas others have the socket on the side or underneath it. There are a variety of plug-in timer switches, including ones that can be controlled with a smartphone or tablet. Most mechanical timers feature a dial with hour and half-hour marks. You can also utilize the teeth to set an “ON” and “OFF” time. There are models with multiple sets that allow you to alter the times of turning off and on for different days of the week. It's important to remember that mechanical timers do not always work as expected, particularly if the internal clock gets a bit off. If your timer isn't turning on or off as it should, check the wiring for any issues and make sure that all pins are pressed in correctly. If you're unable to fix it, it's best that you contact an expert. Alternately, you can replace the timer with a fresh one. It is also recommended to keep the timer in a safe place away from pets and children.