In the early days, when both water storage and instant electric water heaters were introduced to the market, the former quickly gained popularity while the latter struggled to find its place. However, times have changed. Recently, industry insiders from a major shopping mall reported that the market for instant electric water heaters is showing promising signs, with high demand and frequent sales.
An instant electric water heater, also known as a quick-heating model, works by placing a heating element inside a flow-through tank. The water flows back and forth through the tank, allowing the electric heating element to heat the water directly and repeatedly as it passes through. This process enables the water to reach the desired temperature quickly. Recent models have been improved with new designs, featuring high-efficiency semiconductor and nickel-chromium alloy heating elements, along with an external wraparound circulation tube system. These advancements result in faster heating and higher thermal efficiency. With just a few seconds of operation, hot water can be delivered continuously from the tap.
In contrast, traditional storage-type electric water heaters use a carbon heating rod to warm up the surrounding water, which then spreads throughout the tank. This indirect heating method leads to longer preheating times, especially during winter, where it may take up to two hours before hot water is available. Additionally, storage-type units are bulky and heavy, often taking up valuable space in small bathrooms. Their large tanks can make the room feel cramped and unattractive, even in larger homes.
Another key difference lies in energy consumption. While some people believe that higher power means higher electricity usage, this isn't always the case. Storage-type heaters consume energy continuously during preheating and insulation, leading to significant losses. On the other hand, instant electric water heaters operate at high power for a short duration, minimizing waste and resulting in lower overall consumption. Studies show that they can be 40-50% more energy-efficient than their storage counterparts.
Modern instant electric water heaters also feature advanced control systems. Unlike older models that relied on front-mounted valves to regulate water flow and temperature, newer versions use a rear-standard structure. This design allows for easier installation, better control over hot water output, and multi-channel water supply, making them ideal for kitchens, sinks, and showers.
Installation is another advantage of instant models. They are compact, lightweight, and easy to mount on the wall, unlike storage heaters, which are heavy and difficult to install. For example, the Aotelang fast electric water heater features a digital display and simple controls, allowing users to adjust temperature easily without complicated settings.
However, there are challenges. Instant electric water heaters require a strong electrical connection—typically a wire cross-section of at least 4 mm² and a capacity of 40A or more. Many older residential buildings still have outdated power systems, limiting their adoption. But as cities upgrade their power grids, the infrastructure is becoming more suitable for these modern units.
With safety features like overheating protection, pressure regulation, smoke detection, leakage prevention, and water-electricity separation, instant electric water heaters are continuously improving. Brands like Dr. Autland and Ariston are leading the way in innovation.
Overall, the future of instant electric water heaters looks bright. Like how color TVs replaced black-and-white ones, these units are expected to become the preferred choice for many households in the coming years.
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