The exergetic view of an electric heater considers the efficiency and quality of the energy conversion process. It takes into account the amount of useful work that can be obtained from the electricity input, as well as the amount of waste and irreversibilities generated during the heating process. This perspective allows for a more comprehensive analysis of the heater's performance, taking into consideration not only the input and output energy, but also the quality and potential usefulness of the energy. This can help in identifying opportunities for improving the efficiency and sustainability of the heating process. **

A tankless water heater with a mixer tap works by heating water on demand as it passes through the unit. When hot water is needed, the heater activates and heats the water as it flows through the system. The mixer tap then allows the user to adjust the temperature of the hot water by blending it with cold water to achieve the desired temperature. This system provides a continuous supply of hot water without the need for a storage tank, making it energy-efficient and space-saving. **

The water tap with an instantaneous water heater may keep running due to a malfunction in the heater's internal components. This could be caused by a faulty sensor, a damaged heating element, or a problem with the water flow control mechanism. Additionally, there may be an issue with the tap itself, such as a worn-out washer or a faulty valve, leading to a continuous flow of water. It is important to have a professional plumber inspect and repair the heater and tap to prevent water wastage and potential damage to the system. **

The best heater for you will depend on your specific needs and preferences. Consider factors such as the size of the space you need to heat, your budget, and whether you prefer a portable or fixed heater. Electric heaters are often a popular choice for their ease of use and efficiency, while propane heaters are a good option for outdoor spaces or areas without access to electricity. Ultimately, it's important to choose a heater that meets your heating requirements and fits within your budget. **

The cheapest infrared heater/electric heater can vary depending on the brand, model, and features. However, some of the most affordable options include compact infrared space heaters or basic electric fan heaters. These types of heaters are often designed for small spaces and can be found at budget-friendly prices. It's important to consider the heating capacity, energy efficiency, and safety features when choosing a budget-friendly infrared or electric heater. **

Based on the image provided, it appears to be a mixer tap. This is because it has separate controls for hot and cold water, allowing the user to adjust the temperature by mixing the two. Additionally, it does not have the typical display or controls of a shower thermostat or tankless water heater. **

The choice between a gas heater and an electric heater depends on various factors such as cost, energy efficiency, and safety. Gas heaters are often more cost-effective to operate but require proper ventilation to prevent carbon monoxide poisoning. Electric heaters are generally safer and easier to install but can be more expensive to run. Consider your specific needs and circumstances before making a decision between a gas or electric heater. **

The choice between a gas and a diesel heater depends on your specific needs and circumstances. Gas heaters are generally more efficient and cost-effective for smaller spaces, while diesel heaters are better for larger areas and can provide more consistent heat in extreme cold conditions. Gas heaters are also easier to install and maintain, while diesel heaters may require more regular maintenance and access to fuel. Ultimately, the better option will depend on factors such as the size of the space, the climate, and your specific heating needs. **