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Best Electric Water Heater Review 2017: Rheem. Tankless VS Tank. Gas or electric

Tankless water heaters that run on electricity are the most affordable variant for homeowners looking to change their system. As well as with gas-powered models, electric systems will save your cash on energy bills, and give you unaltered hot water on demand without the limitations of a tank!

No matter if you live alone in a studio apartment or in a bustling household with many bathrooms, there are tankless electric water heaters to suit any application! As your tankless plumbing experts, we’ve done the research to help you find your perfect unit!

Electricity is better than gas:

  • despite the fact that the gas is often a cheaper fuel, electric units are less expensive to buy
  • because of the absence of combustion, they’re a bit more reliable over the long term
  • they don’t need to be ventilated or installed outside the house
  • there is no need to pay the setup costs of ventilation and gas piping
  • you can get completely off the grid, and use them with solar panels

Rheem RTEX 13 Electric Tankless Water Heater, 4 GPM

The Rheem RTE 13 has been one of the most popular units on the market. We’ve recommended it ever since we put our first guide together. Now an updated version, the RTEX 13 is available! It’s just as efficacious, durable, and space-efficient as its predecessor. Plus, the new model adds a digital thermostat with user-friendly controls, as well as even more durable innards!

It would work similarly well for couples or roommates in one bathroom apartments where shower times are staggered. Your folks will also find that it’s a comfortable single-room option for a guest suite or washroom.

It has a maximum flow rate of 4 GPM, which is a lot for the price. This one is an ideal choice for a one-shower-at-a-time household, or for homes with dual showers that are equipped with 1.5 GPM (low flow) fixtures.

It’s one of the most compact options out there, and it fits in tight cramped spaces very easily-even in a small cupboard, or above the sink. This unit is “ultra compact,” so it can be installed almost anywhere, which is a good benefit for smaller residences.

The RTEX 13 is also cheap enough that energy savings will pay for the whole thing fairly quickly into the process–one reviewer claimed that it paid for itself (unit and install cost) in 17 months! That’s one of the best turnover periods out there.

While the previous model didn’t quite live up to Rheem’s legendary reputation for build quality and reliability, this model does! The RTEX13 hasn’t been on the market very long, but it seems much more rugged, and so far has a perfect reliability record!

This Rheem is a great choice for smaller households (1-2 people) without a tremendous demand for hot water, or for bigger households willing to do one hot water task at a time. If you need a compact solution for small-scale use, though, we don’t think you can do any better!

Buying Guide

Picking the right unit for your household is a matter of weighing your:

  • overall needs for hot water
  • the climate you live in
  • the unit price

For people who live in warmer climate, there is no need to use a lot of energy. That’s why such folks can spend less. Consequently people in warmer climates can get away with buying units with a lower gallons per minute (GPM) output, or at least get to enjoy more reliably high-flow rates that people in colder climates.

If you’re in a particularly cold spot, we recommend rounding your supply needs up by at least 30%, closer to 50% if you like to be totally assured of having supply. So, if you actually need 4 gallons per minute, you’ll actually want to look for a 5 or 6 GPM to compensate.

Gratefully, a lot of manufacturers make it easier by providing climate zone charts in their product listings. If you have a look at those, you can get a quick sense of what you can expect from each model in your area.

Another big factor to take into consideration is your household size and the average demand you’ll be placing on your system. Add up all your GPM (gallons per minute) usage requirements for a maximum usage scenario that you can use while you’re choosing your new equipment.

Think about how responsible of hot water use the people in your house are.

It’s additionally sensible to ask yourself whether or not you want to have to think about rationing your usage at all.


Be sure to consider the value of the installation into your purchase. Every unit has its own installation and conversion demands, and you ought to be aware of those costs as you work out your budget. Tankless electrical water heaters are cheaper and easier to put in than their gas equivalents. However, they still most likely need skilled facilitate unless you're a real DIY talent.


Always read the fine print, and make sure you’re going to be covered for the long term. Remember: it’s better to pay the extra money up front to have a certified installer work on your equipment if it saves you the price of buying a new one when something goes wrong!