Tankless Water Heater Savings Calculator

Tankless water heaters are a popular choice for many households looking to save energy and money. By only heating water as it is needed, tankless water heaters can provide significant savings on energy bills compared to traditional tank-style water heaters. However, determining the exact savings can be difficult without accurate information about your specific household usage and energy costs. That's where our Tankless Water Heater Savings Calculator comes in.

Using data about your household and water usage, our calculator can estimate how much you could save by switching to a tankless water heater. So whether you're considering a switch to a tankless water heater or just curious about the potential savings, our calculator can help you make an informed decision.

Tankless Water Heater Savings Calculator

Calculate your potential savings by switching to a tankless water heater.

Tankless Water Heater Savings Results
Current Water Heater Size0
Current Water Heater Efficiency0
New Water Heater Efficiency0
Energy Cost0
Average Daily Usage0
Number of Years of Use0
Current Annual Cost0
New Annual Cost0
Annual Savings0
Lifetime Savings0

assessing the potential savings from a tankless water heater is essential for energy-efficient hot water supply. Our tankless water heater savings calculator simplifies this assessment. To gain insights into related calculations, such as electric tankless water heater sizing, link it with our electric tankless water heater calculator. This tandem approach provides comprehensive resources for hot water system evaluation.

Tankless Water Heater Savings Calculator: How to Use It

Tankless water heaters are becoming increasingly popular as people try to find ways to reduce their energy consumption and save money. The Tankless Water Heater Savings Calculator is a tool that can help you estimate your potential savings if you switch from a traditional water heater to a tankless one. In this article, we will explain how to use the Tankless Water Heater Savings Calculator.

Input Fields

To use the Tankless Water Heater Savings Calculator, you will need to provide the following input data:

  • Current water heater size (gallons): This refers to the size of your current water heater in gallons. The larger your water heater, the more energy it will consume to keep the water hot.
  • Current water heater efficiency (%): This refers to the efficiency of your current water heater. The less efficient your water heater, the more energy it will consume.
  • New water heater efficiency (%): This refers to the efficiency of the tankless water heater you plan to purchase. Tankless water heaters are generally more efficient than traditional water heaters.
  • Energy cost ($/kWh): This is the cost of energy per kilowatt-hour in your area.
  • Average daily usage (gallons): This is the average amount of hot water you use daily in gallons.
  • Number of years of use: This is the number of years you plan to use the tankless water heater.

Output Fields

The Tankless Water Heater Savings Calculator provides the following output data:

  • Current Annual Cost: This is the estimated annual cost of operating your current water heater.
  • New Annual Cost: This is the estimated annual cost of operating your new tankless water heater.
  • Annual Savings: This is the estimated amount of money you could save annually by switching to a tankless water heater.
  • Lifetime Savings: This is the estimated amount of money you could save over the lifetime of your tankless water heater.

Formula

The formula used by the Tankless Water Heater Savings Calculator is:

  • Current Annual Cost = (365 * oldGallon * 8.34 * (1 / oldEfficiency - 1) * energyCost) / 100
  • New Annual Cost = (365 * usage * 8.34 * (1 / newEfficiency - 1) * energyCost) / 100
  • Annual Savings = Current Annual Cost - New Annual Cost
  • Lifetime Savings = Annual Savings * years

Example Let's say you currently have a 50-gallon water heater with an efficiency of 70% and you plan to switch to a tankless water heater with an efficiency of 90%. Your energy cost is $0.15/kWh, and you use an average of 20 gallons of hot water per day. You plan to use the tankless water heater for 10 years.

Using the Tankless Water Heater Savings Calculator, you would input the following values:

  • Current water heater size (gallons): 50
  • Current water heater efficiency (%): 70
  • New water heater efficiency (%): 90
  • Energy cost ($/kWh): 0.15
  • Average daily usage (gallons): 20
  • Number of years of use: 10

The calculator would then output the following values:

  • Current Annual Cost: $562.60
  • New Annual Cost: $231.00
  • Annual Savings: $331.60
  • Lifetime Savings: $3,316.00
Current Water Heater SizeCurrent Water Heater EfficiencyNew Water Heater EfficiencyEnergy CostAverage Daily UsageNumber of Years of UseCurrent Annual CostNew Annual CostAnnual SavingsLifetime Savings
5060%95%$0.105010$455.63$145.13$310.50$3,105.00
8075%98%$0.127515$1,240.50$482.84$757.66$11,364.90
4050%80%$0.08305$186.89$72.73$114.16$570.80
6080%90%$0.156020$1,211.70$678.66$533.04$10,660.80

In conclusion, the "Tankless Water Heater Savings Calculator" is a valuable tool for anyone interested in switching to a tankless water heater. By entering the required input data, the calculator can provide users with valuable insights into their potential savings, including annual and lifetime savings. To ensure accurate results, it is important to provide precise data regarding current water heater size, efficiency, energy cost, average daily usage, and number of years of use. By following the instructions outlined in this post, users can make informed decisions about whether to make the switch to a tankless water heater and enjoy significant savings over time.

About the Author


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Siam Anik
Plumbing Engineer

Siam Anik is a Bangladeshi plumbing engineer who graduated with a degree in mechanical engineering and has over 7 years of experience in the plumbing industry.