|Feature||Low end of|
|High end of
|Installed cost of a tank-type water heater||$900||$1300|
|Installed cost of a tankless water heater|
( average: $3000 for a non-condensing unit
and $3500 for a condensing unit )
|Average hot water use per house was|
41 gallons per day
|20 gpd||62 gpd|
|Efficiency rating for tested rank-type heater||0.60||0.60
|Measured efficiency of a rank-type heater||0.49||0.49|
|Efficiency rating for tested tankless heaters||0.82||0.95|
|Measured efficiency of tankless heaters||0.62||0.89|
|Percentage gas saved by tankless heaters|
compared to tank-type heater
( average, 37% )
|23 %||55 %|
|Energy saved by tankless heaters,|
considering electricity use as well
as gas use
|19 %||53 %|
|Annual natural gas savings||42 therms||95 therms|
|Annual dollar savings|
(at $0.96 per therm)
|Simple payback period (assuming an|
average installed cost of $3000 for
a non-condensing tankless water
heater and $3500 for a condensing
gas water heater)
|21 years||71 years|
Don’t wait until your hot water goes out to replace your water heater. Whether you’re planning ahead or facing a problem with your current unit, this video walks you through how to buy a storage-tank water heater.
It is important to replace the existing water heater with one that is compatible with your home. Here are the primary considerations in selecting a water heater. It is very important to note whether your water heater is gas or electric.
Gas water heaters
First, let’s talk about gas. Natural gas is far more common than liquid propane. Natural gas is delivered to the home from underground piping. Propane is typically used in areas without natural gas and is stored as a liquid in a tank. The vast majority of gas water heaters use a vertical vent, or chimney. Some also attach to the vertical venting of your HVAC system. If your water heater has a horizontal vent through the wall, you will need a specialized power vent, or direct vent, model.
Electric water heaters
Electric water heaters use an electrical heating element, and do not require any venting.
Before coming into the store, calling our dedicated hotline, or shopping online, it would be best to measure the height and width of your current water heater and note its tank capacity. Also keep in mind that it needs to fit through your doorways and maybe fitting into a tight space, like a closet or crawlspace.
Here’s a couple of other things to consider– depending on the number of people in your household and the size of your home, you may need more hot water. Consider a water heater with greater tank capacity and a faster recovery rate that is compatible with your home.
Water heaters come with different warranty options, as well as a variety of extended protection agreements. Consider which one would work best for you. Check to see if the water heater you’re looking at purchasing is ENERGY STAR qualified. They save money over time and may be eligible for state tax incentives and local utility rebates.
To recap: note your water heater’s fuel type– either gas or electric. If gas, check whether your water heater uses natural gas or liquid propane and the type of ventilation. Make sure to choose a water heater that will fit in your home. Note your current water heater’s capacity, dimensions, and its location. Lastly, consider whether you need more hot water, the right warranty for you, and whether you want a more energy efficient unit. Those are the basics on how to select a storage-tank water heater.