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Explore the mechanisms and advantages of direct and indirect hot water tanks to choose the right device for your needs in the following article.
1. Pros and Cons of Using Direct and Indirect Hot Water Tanks
Explore the mechanisms and advantages of direct and indirect hot water tanks to choose the right device for your needs in the following article.
Hot water tanks (or hot and cold tanks) are indispensable household appliances in the winter, especially in northern provinces, particularly in families with the elderly, young children, and infants. They provide hot water effortlessly for bathing and hair washing. Hot water can also be used for dishwashing and cooking.
However, among the commonly used types of hot water tanks today, direct and indirect hot water tanks, which one is the suitable choice for your family's needs? Let's find out in the article below.
Indirect hot and cold tank
Indirect hot water tanks are the most common type in the market today. Their advantage is the large capacity; separate water inlet/outlet, allowing for multiple uses and suitable for larger families.
Indirect hot water tanks can be used with bathtubs and washbasins for various purposes. These tanks are equipped with ELCB shock protection and automatic power cut-off in case of overpressure, ensuring user safety from electric shocks or fires.
However, this type of hot water tank is bulky and large-sized. The installation time is long, requiring a sturdy support rack and spacious bathroom. Additionally, due to the need to heat a large volume of water, indirect hot water tanks also require a longer heating time, typically from 15 to 30 minutes, before hot water is available for use.
Direct hot and cold tank
Comparison between Direct and Indirect Hot Water Tanks
When it comes to hot water tanks, the choice between direct and indirect models involves factors such as quick heating, compact design, and cost-effectiveness. Direct tanks, operating through direct resistance heating, offer fast water heating in just a few minutes. They boast a small, diverse, and affordable design, making them easy to install with built-in anti-bacterial showerheads. However, their drawback includes a limited capacity, requiring stable voltage for direct use. In cases of weak water pressure, an additional booster pump is necessary. Direct tanks are primarily suitable for shower use. On the other hand, indirect tanks are recommended for small households or those with low incomes due to their compact size, fast heating, and cost-effectiveness. They are more energy-efficient than indirect tanks, aligning with usage needs and avoiding hot water wastage. Despite their limited maximum water temperature (45-55°C), direct tanks may not be ideal for regions with harsh cold conditions, unlike indirect tanks that can heat water up to 80°C, catering to a broader range of needs, especially in colder Northern provinces. The large capacity of indirect tanks is advantageous for households with diverse and frequent hot water usage needs, including bathing, dishwashing, and laundry.
