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What You Need to Know About an Electric Heater Electric heaters are an excellent way to give a quick burst of warmth when you need it. They are usually rated for a specific size room and come with features like thermostats, overheat switches and timers. An electric heater converts electrical energy into heating in joules. The heating element uses nichrome wire, which is supported by ceramic insulation. Resistor The resistor is a device that reduces the voltage and resorbs some of it in the form of heat. It does this by converting electrical energy into thermal energy, and wasting just a fraction of power. This is a standard process found in electric light bulbs as well as heating elements. The thickness, material, and other properties of the resistor determine its resistance. It is crucial to remember that the greater the resistor's resistance, the more energy it can dissipate. This is because higher currents lead to more electrons in the resistor, and more electrons mean more collisions between them. The higher the temperature, the more collisions occur. In general, resistors have an maximum power rating they can safely dissipate typically between 1/8W (0.125W) and 1W. Resistors that have a high power rating can be distinguished by their larger packaging. The power rating of a resistor could be deduced from the packaging it is packaged in, or by comparing its physical dimension to other resistors with a known power rating. Electric heaters are a special type of power resistor designed to convert electricity into heat. They can generate convective or radiant heating by emitting infrared radiations. They are often used together with fans to increase the heating efficiency. If the maximum power rating of a resistor exceeds the power rating, the resistor will become hot and may damage the components around it. In extreme situations it could even become self-igniting and result in an ignition. To avoid this, a limiting resistor is recommended to be placed in the circuit. Heater resistors come with a color code which indicates their value as well as other data like manufacturing accuracy and temperature coefficient. A six-banded resistor, for instance, has five bands that represent its digits, and the sixth band will reveal the multiplier and tolerance. If you're interested in calculating the value of your resistor, there are a variety of online calculators that can be used. Coil Electric heating coils are the basis of any electrically powered appliance that makes use of heat to warm liquids or objects. These heaters convert electricity to heat by a process called conduction, and they can be shaped into a variety of shapes depending on the application. Electric heating coils are capable of producing a large amount of heat in a short amount of time which makes them ideal for applications that require fast temperatures or high levels of thermal efficiency. The heart of an electrical heating coil is a tightly twisted structure of metal wires. Keep Reading packed structure allows the maximum number of wires to be contained within the smallest space, thereby increasing conductivity. The coil is then insulated with various different materials, based on the needs of the application. For example the insulation of an electric heater used in liquid immersion could be made of a non-flammable material such as polyvinyl chloride (PVC) or polyester or polyimide, while a coil used for cryogenic applications is usually coated with molybdenum disilicide. In addition to offering protection against the elements, these materials also offer resistance to corrosion and oxidation making them suitable 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 balance of cost, oxidation resistance, and corrosion resistance. Since the metals used in a heating coil are exposed to corrosive and high-temperature environments, they need to be protected from damage. These protections include coatings, sealants, better ventilation and drainage, and regular inspections and maintenance. Moisture intrusion is another issue which needs to be taken care of. It can cause damage to heater's internal components and reduce its life span. Coils are also utilized in other equipments, including ovens or furnaces, as well water tanks. They can be cut into different shapes depending on the purpose and are typically printed on substrates like aluminum 6061-T6, mica sheets (muscovite, phlogopite or muscovite), or conductive plastic. They can be coated with a variety of materials to improve their appearance and performance, such as gold, silver and nickel. Thermostat You probably don't think about it however, your thermostat is an important part of your home comfort system. The thermostat's primary function is to turn off and on the heater, so that you can keep your desired temperature. It can also adjust the temperature to suit your routine. This is ideal for those who have an unpredictable schedule. The majority of thermostats are digital electronic models that can be programmed via a computer interface or smartphone app. Some models have a learning feature that adapts to your lifestyle. You'll never need to think about when you should be home for dinner. In the older thermostats that did not have digital technology, 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. Then, as the strip cooled, it bent back and snapped out of its initial position, which shut off the heating. Modern electronic thermostats have replaced the electromechanical ones with more precise technology that uses a temperature sensor and small relay to do the same thing. However, it's still easy to understand the workings of an electromechanical thermostat by examining its components. One of the main components is a thermometer coil, which has a piece of mercury in it. When you move the lever on the thermostat up or down, it rotates the coil and tilts the mercury switch one way or the other. If the mercury switch is tipped to the left, it will trigger a relay and turn on the heater. As the room heats the mercury turns to the right, which breaks the circuit. The heater then shuts down. When the room cools, the mercury returns to its original position and the heater comes back on. If you continue to change the temperature of your electric thermostat, the system may require overtime to keep up with your ever-changing preferences, which can cause it to use more energy than it needs to. Timer A wall heater timer lets you to program your lighting and heating. It comes with a built-in clock that will automatically turn on and off your lighting or heaters according to the time you set. It can also help you save money on your energy bills by avoiding unnecessary usage. These devices are primarily employed in homes, however they can also be found in commercial facilities and industrial places. They offer convenience, energy efficiency and security by controlling when electric circuits are turned on and off. They can be utilized to control appliances such as lights, water pumps and ovens. They are a great choice for those who wish to control their electrical appliances without the need for a complicated programming system or computer. Plugging a timer switch into an extension cord or outlet lets you set the timer. Then connect the appliance you wish to control. Based on the model, you can plug in multiple devices at the same time. Some models have a socket located in the middle of the timer, while others have the socket under or on the side of it. There are various plug-in switches for instance, those that can be controlled by smartphones or tablet. Most mechanical timers come with an hour and half-hour markers. They also have little teeth that you can pull outwards to set the “ON” time and push inward to set the “OFF” time. There are also models with multiple sets that allow you to set the times of turning off and on for different days of the week. Remember that mechanical timers may not always function correctly particularly if their internal clock is slightly off. If your timer does not turn on or off as it is supposed to, check the wiring for any problems and make sure that all pins are correctly inserted. If you still can't get it to function, it's best to consult a professional for help. You can also replace the timer by a new one. It is also recommended to keep the timer somewhere safe, away from pets and children.