Hot Stats: Comparing Water Heater Efficiency for Savings

JB Thompson • December 22, 2023

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There are multiple reasons why water heater efficiency is important, such as they are a long-term investment, ensure the availability of hot water during harsh winters, consume less energy, provide enhanced performance when maintained properly, etc.

Wisconsin Public Service has warned the public that utility bills are going to be higher in the winter. On average, a customer spends $120 a month on heating in winter, as per WPS. With the help of an efficient water heater, you can keep your utility bills on the lower side.

Types of Water Heaters

The most common types of water heaters are:

Tankless Water Heaters: These water heaters don’t have a storage tank but rapidly heat water as it flows through the unit. The hot water is available on demand without any standby heat loss. Plus, they take up less space in your bathroom.

Storage Tank Heaters: These are the most common types of water heaters. They come with an insulated storage tank that stores the hot water and keeps it hot until unused. They take up a lot of space and are known for standby heat loss.

Here is a comparison of different water heater types:

Tankless Water Heater

  • It is a compact unit without a storage tank.
  • It is suitable for smaller spaces.
  • It reduces standby heat loss.


Storage Tank Water Heater

  • It has a large tank for storing water.
  • It is available in different sizes based on your needs.
  • It needs space for installation, which isn’t a good option if you don’t have space.



Energy Efficiency Ratings

Energy efficiency ratings such as Energy Factor are useful metrics used to assess the water heater efficiency.

Storage Tank Water Heaters

The EF measures the efficiency of such water heaters by measuring how efficiently the energy, i.e., gas or electricity, is converted into hot water. It ranges from 0.67-0.95, and a higher EF means higher efficiency.

Tankless Water Heaters

 Tankless water heaters have greater efficiency, typically ranging from 0.80-0.99, meaning they use less energy. Due to on-demand hot water availability and no heat loss, they are the second most efficient water heater types.

Cost of Operation Comparison

Here is the comparison of annual operating costs for different water heater types:

Storage Tank Water Heaters

With an EF rating ranging between 0.67 and 0.95, these water heaters have an annual operating cost of $450 to $600 due to high electricity usage and maintenance costs.

Tankless Water Heaters

Based on an EF rating between 0.80-0.99, these water heaters have an annual operating cost of $200-$450.

Environmental Impact

Storage Tank Water Heaters: They have moderate to high energy consumption, contributing to higher greenhouse emissions and a considerable carbon footprint.

Tankless Water Heaters: They have a low to moderate energy consumption, and compared to storage tank heaters, the greenhouse emissions are lower. The carbon footprint is also lower in comparison.

Lifespan and Maintenance Costs

Storage Tank Water Heater: They have a lifespan of 10-15 years, but regular maintenance, such as flushing the tank and clearing the sediment buildup, can ensure longevity.


Tankless water Heaters: Tankless water heaters have no components to clean and flush, and they last for 20+ years. They are known for their durability.



Maintenance requirements and associated costs:

Storage Tank Water Heaters: They require regular flushing and sediment cleaning. Calling a professional is the best advice, which might cost $100-$200 per service.


Tankless Water Heaters: Proper vent checks and potential parts replacement are required from time to time and might cost $100-$300 per service.


Future Trends in Water Heating

Integration of smart technologies allows remote monitoring, scheduling, and adjusting temperatures via mobile apps, a safe and energy-efficient alternative.


Hybrid water heaters are also making headlines as they come with dual-mode operation, so you can choose a preferred mode.


The focus is on water heater efficiency to reduce carbon footprint and harness the power of automation for additional savings.


Predictive maintenance can prevent inefficiencies and lengthen the lifespan of the equipment.


There is greater adoption of eco-friendly water heating technologies which align with sustainability goals.



Conclusion

In Green Bay winters, a water heater isn’t enough. You need an efficient water heater that meets your family’s needs and does not burn your money on utility bills. It is said that “many little things add up to big things”. Take the initiative towards a greener future by installing energy-efficient equipment.


Water heaters are an investment, and by investing in energy-efficient equipment, such as a tankless water heater, you can ensure hot water availability for your family without leaving a significant carbon footprint.