Best 5 Whole House Tankless Water Heaters

The winter season is here and along with it, come high electric bills. Whole house tankless water heaters are a way to not only save money on your energy bill, but also keep the flow of hot water coming during those icy cold winter days. But which whole house heaters were rated the best by consumers?

I have here EXACTLY what you need to enjoy the cold winter season without freezing – the top 5 whole house water heaters of 2010!

#1: Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater

The Stiebel Eltron Tempra 24 Plus Electric Tankless Water Heater – this one tops our list! Without a doubt, it’s one of the best and most technologically advanced tankless water heaters you can lay your hands on.

This series – the Tempra 24 PLUS, has been redesigned from the ground up…beefed up and made even better with heavy duty electronics, a simple and single flowing sensor design, a hinged cover that gives you easier access, and this is topped off by the Advanced Flow Control, which is exclusive only to Tempra PLUS.

What made this whole house water heater stand out from your usual gas-type tankless water heater is that it’s way more affordable and installing it to your home is way easier. In fact, homeowners report an average cost savings of 15-20% or greater on their electric bill after installing the Tempra 24.

Here are some specs for you to check out:
- Control water temperature digitally
- 240 V, wattage of 24 kilowatts
- Maximum Water Temperature Increase: 92 degrees

Dimensions
- Weight: 15.4 pounds
- Very compact: only about the size of a picture frame (16.5'' wide by 14.5'' tall x 4.5'' depth)

#2: Bosch AE125 PowerStar 4 GPM Indoor Electric Tankless Water Heater

Bosch – we all know this is one of the tried and tested names when it comes to tools and home improvement gadgets. And the PowerStar water heater did NOT disappoint. The AE125 brings the performance you are looking for in tankless water heater models to applications where you need an electric unit.

It’s compact and it’s powerful. You can count on it to supply enough hot water from one application to another.

This electric whole house water heater is VERY suitable if you are living in a place where the annual underground water is below 60 degrees Fahrenheit. Another thing I really like about this model is that it can push out 4 gallons of HOT water every single minute! And it does it with an average energy efficiency rating of 94.

The package includes a solid copper heater exchange as well as a water heater. Check out the dimensions below:
- 15-1/2 by 15-1/4 by 4-1/2 inches
- 22 pounds
- 10-year limited warranty (which shows that Bosch really backs this water heater up) on heat exchanger and 1-year warranty on the parts.

#3: Bosch AE115 PowerStar 2.6 GPM Indoor Whole House Electric Tankless Water Heater

So you are looking for a whole house and electric water heater that could bring tankless performance to household applications where you usually need an electric water heater model?

Yeah?

If that’s the case then the Bosch AE115 PowerStar 2.6 GPM Indoor Whole House Water Heater is yours for the taking! Really compact with heavy duty performance – there’s really nothing more you can ask for from it. It’s built inside and out to serve you for a long time to come, save space, and be easily installed by mounting on your wall.

Pumping out 2.6 gallons of hot water every minute, you are sure to have more than enough for one household application at a time.

Here are some specs and dimensions that should get you thinking in the right direction:

- Comes with an average energy efficiency rating of 90 percent.
- Needs minimum electrical service to the home of 150 amps.
- 15-1/2-by-15-1/4-by-4-1/2-inches
- Weight of 20-pounds (REALLY light!)
- Electrical: 240/208-volts
- 17/13-kilowatts

#4: Stiebel Eltron Tempra 36 Plus Electric Tankless Whole House Water Heater

The Tempra PLUS – if you’re looking for whole house water heaters that are ahead of those models found in the market, then this line up of units from Stiebel is a name you should look up. For one thing, the Advanced Flow Control, which ensures you get temperature output regardless of how great your hot water demands are, is EXCLUSIVE only to Tempra PLUS.

This works by automatically tweaking the flow of water to get rid of unpleasant temperature fluctuations. And this guarantees you get constant satisfying experience no matter what time of the day – every time and all the time.

To make the deal even sweeter, a Flexible Water Heater Connector comes with the Tempra 36 PLUS…and you don’t have to spend even a single dime! When compared side by side with a gas type and tankless water heater, the Eltron Tempra 36 PLUS is more cost efficient, more affordable to install since it doesn’t need venting parts, etc.

In simpler terms, it outdoes your average tankless water heater in all angles.

Other niceties:
- Has a digital temperature control
- Tried, tested, and approved
- Doesn’t need any venting
- Showcases a sleek design that can fit anywhere
- Allows you to save well over 15 to 20 percent on the hot water portion of your monthly utility and electric bill

#5: Stiebel Eltron Tempra 12 Plus Electric Tankless Whole House Water Heater

Any whole house water heater from Stiebel, especially from the Tempra PLUS line up, is a force to be reckoned with. And the Tempra 12 PLUS is no exception! You see, his consistently heats the water instantaneously when you need it – and only when you need it! That means no energy is wasted for heating water that you don’t require.

Also, the Eltron Tempra 12 PLUS totally replaces the need for a conventional tank heater – and it gets the job done without disrupting your comfort and without compromising your hot water needs. Without a doubt, this is one of the most advanced tankless water heaters available on the market. Just like the previous Stiebel units above, this is beefed up with the proprietary Advanced Flow Control Technology, which works by adjusting the flow of water, which eliminates the unpleasant temperature fluctuation.