Pros and Cons of Different Water Heater Designs

The need for hot water at home will take you to an electronics store and traverse through the various options of water heaters. Since the market has introduced several designs for the water heaters, choosing one would be quite a task. All types have their pros and cons, making it harder for you to weigh out the best one. It isn’t always the best heater that serves you well; you must be able to pick the right one for your home. Your choice should depend on your needs, home’s architecture, and budget. Let us look at two types of water heaters and their advantages and disadvantages.

1.     Storage Hot Water Heaters

This type of water heater has a tank to hold the water, meaning the capacity of the tank determines the amount of water available for a period of time. The tank insulation keeps the water warm for some time even after the electricity supply is cut off. Tanks without a high insulation factor can be covered with a water heater blanket to keep the temperature consistent. The heater features a pressure control valve and a temperature control valve. Although most families use storage water heaters for residential purposes, these tanks cannot hold much water for a long time.


  • A wide range of sizes are offered with the storage water heaters, usually ranging from 20 to 80 gallons. It is best to choose the capacity according to your family’s needs. Since the tank’s size is an issue that hassles most users, opting for the type that can serve at least day’s hot water requirements would be ideal.
  • Easy to install and mostly inexpensive.
  • These heaters offer an average energy factor rating of 0.67.


  • The size is at times a concern, but since the NAECA standards have scaled up the capacity by increasing the massiveness of the tank, you will need more space to accommodate it.
  • When using these heaters for extended periods, they only supply a limited amount of water.
  • Radiant heat loss can cause around 15% of energy loss in these tanks.
  • The life expectancy of these heaters is around 10 years.

2.     Tankless Hot Water Heaters

As opposed to the storage water heaters, this type of heater doesn’t have a tank. Super-heated coils are used in this heater to fill the water and heat it as soon as you need it. Tankless heaters are ideal when you have a huge family and require an instant hot water supply. Households using natural gas can effectively place tankless heaters, but more gas would be required if larger sizes are to be used.


  • Around 20%-30% lower energy consumption than storage water tanks.
  • With the minimal space requirement and stable installation costs, this heater meets all the NAECA standards.
  • Minimal standby energy waste is produced.
  • It can be mounted on a wall and will provide a virtually endless water supply.
  • The average life expectancy of tankless water heaters is 20 years or more.


  • According to the size of the unit, the hot water flow rate will be limited.
  • Tankless water heater installations are more expensive and complicated.

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