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While there are a myriad of factors to consider when weighing whether to replace your water heater, the most important one tends to be age. Traditional water heaters generally have a lifespan of 10-15 years, while tankless systems can last 20 years or more. However, your water heater may wear down earlier depending on the quality of your water heater.

Technically, yes. Electric and gas water heaters can explode, if the temperature and pressure relief valves malfunction. You will also want to watch out for gas leaks, if gas is the fuel that your unit runs on. However, the good news is that these problems are extremely rare—especially if you call an experienced technician right away when something seems off with your unit. With regular water heater repairs and maintenance, your household will remain completely safe and your water heater will run at maximum efficiency for years to come.

Your water heater’s EF, or Energy Factor rating, is the measurement of its overall energy efficiency. EF is calculated by comparing the total amount of energy it takes to heat your water with the unit’s daily energy consumption. The higher your water heater’s EF rating is, the lower your operating costs will usually be. While water heaters with a higher EF are generally more expensive to install, they are often a good investment because of the long-term savings they provide in utility bills. It is also worth mentioning that different water heaters will have different EFs depending on their fuel types. Tank heaters can be powered by natural gas, electricity, oil, propane, and solar power. Tankless models, for the most part, can only be powered by natural gas or electricity. Size is also a factor in EF, which is why smaller, tankless units – especially when used in smaller homes – tend to be so energy-efficient.