Editorial Product Review:Item Description:Includes 2400ES Natural Gas Tankless Water Heater - 2400ES-NG-RE.
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Buyer Reviews
Average Buyer Rating:

Customer Rating: 
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Pray you don't get a defect
I would generally agree with Peter J. Vaughan's assessment that is until there was a gas leak. I had the gas company over 4 times. They couldn't find a leak, but could smell one. After checking all the lines from the source to the unit they concluded that the lines were tight and not leaking. Cost $400.
They asked that I not use names, but the truth is the truth. I called Bosch technical support who would not talk to me, only a gas certified technician at the water heater... The tech took 45 minutes to figure that the control valve was bad. We called Bosch again at 455PM Eastern time to find out that they turn off the phones! I paid again.
The next morning I called the hotline again, went through the same dance until I spoke to the Manager Stan. They are gatekeepers; Stan let me by to Dwaine.
Dwaine granted that it is difficult for anyone not in the Eastern Time zone to speak to them and that they do not have any field warranty people. I pleaded my case and they are sending a replacement unit (after I gave them my credit card) standard UPS. I asked about all the labor I've paid due to THEIR DEFECT... Too bad, we only warrant the unit, you must pay the labor to remove and reinstall the unit.
Conclusion: Do Not buy any Bosch water heaters. According to the tech, he sees a 40-45% defect ratio, Too high and too expensive to risk. My total labor was $850 plus the original installation.
Customer Rating: 
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Some Getting Used To...
I wanted to write an honest review of this product since I couldn't find much online about on-demand hot water heaters. Our tank broke, flooding the basement, and we wanted to look into alternative ways to heat our water efficiently. We're in Boston and the tap water here is about 45 degrees.
The way this works is that when you turn on the hot water in the house, the unit senses the water flow and begins to heat up a set of pipes inside. As the water passes through, it's heated to about 122 degrees.
The pros:
- It works normally, just like before. I turn on hot water, I get hot water.
- You don't experience any standby losses of having a tank - Gas is only used when you are actually using hot water saving both money and energy.
- The water is very hot in the shower. We can also use the dishwasher OR the washing machine with the shower. All three would probably not work well.
- There's no footprint. You put this on the wall, and it's vented outside.
- If something breaks, you replace a part rather than the entire tank, saving time and money.
- If it breaks, there's no flooding!
- We received rebates from both the gas company and from the federal government through a tax credit for the "green" purchase.
The cons:
- It costs more than a traditional tank to both purchase and install. We paid about $1000 for the unit itself, and an additional $1000 to have it installed. We had to have someone drill a new vent (both out and intake), put in stainless steel and PVC piping, and re-route the hot water in our basement.
- It takes a few seconds to up to a minute for the water to heat up.
- It's more difficult to make incremental changes to water temperature.
- You cannot get a "trickle" of hot water. The unit needs a certain flow to start in order not to damage pipes.
All in all, we're extremely happy with this unit since the cons were more a matter of up front cost (but we'll save down the road) and lifestyle changes.