Mistakes Everyone Makes When Buying A Water Heater

Figuring out which water heater is right for you can be a daunting process. Weighing cost against quality, especially with inflation affecting prices, can be challenging. Deciding on your water heater's size, type, and fuel type doesn't have to be hard, though. Knowing your peak demand for hot water on an average day can help you make the right decision. 

Richard Tretheway, a plumbing and heating expert from This Old House, says, "Size a water heater for your demand 363 days a year, not the one or two days that you've got 25 relatives visiting. Otherwise, you'll end up with an energy-gobbling beast in the basement." This and many other common mistakes can cost you when choosing your new hot water heater. Knowing your way around sizes, fuel type, configuration, and climate and insulation concerns can make a world of difference when choosing the right water heater, so here are some mistakes to avoid when making your selection.

Water heaters are more than just giant tanks in your basement. There are many advancements in heating methods that can save you money. According to Ygrene, the types of water heaters in the U.S. are: conventional, tankless, heat pump, solar, and condensing. Conventional water heaters use more energy than other types because they constantly heat a supply of water. In contrast, on-demand type systems like tankless water heaters heat water on an as-needed basis. 

While heat pump water heaters tend to be the most efficient, they require lots of space and can only be operated in temperatures between 40 and 90 degrees. Solar hot water systems operate on sunlight, so unless you live in a mostly sunny climate, you'll be relying on your regular electric service the rest of the time. While condensing models are more efficient than traditional water heaters, they can be expensive to install and require a lot of space. Knowing your spatial constraints, zoning ordinances, and energy constraints will help you make a well-informed decision about what kind of water heater to purchase.

The climate where you and your water heater are located makes a difference in water temperature and efficiency. For instance, solar-powered water heaters are very efficient when they get enough sun, but if you live in an area with less sunshine, these systems will need a back-up power source to run, as per Homenish. Because they have storage tanks, they keep a supply of water heated all the time, meaning that if you're using your home's electricity as a back-up, you're paying the same during that time as you would for a conventional hot water heater. 

Areas where temperatures get cold will also need to factor in insulation costs. In addition to weather and temperature, the minerals in your water supply can affect the life of your water heater. Calcium build-up and scale can cause deterioration in your water tank, and even sometimes in your tankless system. Regular maintenance is important to protect your hot water system and avoid these environmental factors.

The amount of water you need to use affects the size of the water heater. Conventional water heaters can range in size from about 30 to 80 gallons, and Home Inspection Insider recommends calculating that each person in your household represents about 10 to 15 gallons of water usage. However, some water heaters recover faster, so they can heat more water more quickly. For example, an electric water heater that serves a family of five would need an 80-gallon tank, but you only need a 50-gallon tank for a gas-powered unit. 

For tankless water heaters, you need to measure the flow rate of the water going through your household and factor in the rate of temperature increase that your water heater can handle. Running a washing machine will use two gallons per minute (GPM), while your average faucet uses 1.5 GPM. To calculate the temperature needed, subtract the temperature of the water coming into your house, which is 50 degrees on average, from the desired temperature of your hot water, which is usually about 100 to 120 degrees. If you want to use the washer and faucet simultaneously, you need a tankless water heater that can produce water at 50 to 70 degrees at a rate of 3.5 GPM. The more efficient your appliances are, the less flow your water heater will need to keep up with.

Some water heaters can last longer than others. According to the International Association of Certified Home Inspectors, factors that can affect the lifespan of a water heater are the minerals in your municipal water supply, the volume of hot water that runs through the system, and the correct installation of the unit. The basic rule of thumb is to determine if the parts required to fix your existing water heater amount to more than 10% of the cost of buying a new one. If they do, it's time to replace your unit. Taking this into account can help you figure out how much money your unit will ultimately cost over time.

The average lifespan of a tankless on-demand water heater is twice that of an average conventional model, according to Energy Saver. This can amount to savings on replacement and maintenance costs in the long run, so taking lifespan into account is a good idea when choosing the type of water heater to buy.

Water heaters aren't for DIYers unless you have some experience. While you might want to save some money by skipping the plumber, this can cause expensive problems down the road. Angi warns that some common mistakes can result in gas leaks, carbon monoxide poisoning from improper venting, fire from gas leaks, or improperly installed wiring. Water leaks can also damage your home, costing a bundle to fix. If your water heater is installed improperly, it might be difficult or impossible to do regular maintenance. 

You could also find yourself on the wrong side of local building codes, or without the correct permits for your job. If any of these pitfalls occur, your homeowner's insurance and warranty won't cover a botched, unlicensed DIY job. While there are tutorials that explain how to install a hot water heater, the systems involved require a degree of experience and are best left to professionals.

A high-efficiency water heater can add value to your home and increase the resale price. According to Effective Agents, the number one improvement you can do to improve your home's resale value is installing a tankless on-demand water heater. Not only is it an environmentally sustainable improvement, but it can also make your home more attractive to future buyers who want to save on future utility bills. The extra space can also be a draw, sometimes adding an extra closet where the big water tank used to be. 

While it may take quite some time to recoup the costs of converting a conventional water heater to a tankless one, the rewards could be shorter-term if you plan to sell your home. Homes with a tankless water heater system bring in 4% more on average and sell 43 days sooner, says Better Housekeeper. That makes tankless hot water heaters a major advantage when you want to sell your home.

Hot water heaters are a big purchase. Spending some time looking at all of your options before choosing one is a good idea. Consumer Reports has gathered helpful data on the different types of water heaters, their costs, and life expectancy. They point out that looking into the warranty of the system you intend to install is important. If your water heater fails after the warranty is expired, the cost to repair or replace it will be significantly higher. 

Water heater tests are conducted under what is considered heavy use circumstances, meaning that the units are put to their maximum capacity to check their performance. Most households with less than six people won't go through more than 80 gallons of water in a day, but testing the performance of water heaters at their limits gives you a better idea of how they will run from day to day. Comparing efficiency, durability, and maintenance costs will mean making the best long-term decision on a water heater.