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Bosch AquaStar 6.4 GPM Indoor Tankless Natural Gas Water Heater #2400E NG | 
 enlarge | Brand: Bosch
Category: Home Improvement
List Price: $1,419.64
Buy New: $1,063.49
You Save: $356.15 (25%)
New (1) Refurbished (1) from $699.95
Rating:  11 reviews
Color: White
Media: Tools & Hardware
Shipping Weight (lbs): 49
Dimensions (in): 8.5 x 15.8 x 23.5
MPN: 2400E NG
Model: 2400E NG
UPC: 052575624006
EAN: 0052575624006
Availability: Usually ships in 1-2 business days
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| Features:
| • | Delivers up to 6.4 gallons per minute and supplies hot water for two applications | | • | Direct vent room-sealed combustion | | • | Built-in power vent for horizontal or vertical venting | | • | Endless hot water |
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| Editorial Reviews:
Amazon.com Product Description
The Bosch 2400E NG AquaStar 5.3 GPM tankless natural gas water heater can heat two major applications at once, so you never have to worry about running out of hot water again, no matter how many teenagers live in your house. Ideal for families needing to operate two major hot-water applications at the same time, this water heater is easy to install and has multiple venting options. With average life expectancy of more than 20 years and offering energy savings of up to 50 percent your family will thank you for years to come. This water heater includes a power vent for horizontal or vertical venting, an electronic ignition, and computer-adjusted fuel and air mixture for optimum performance. A 110-volt outlet is required for the vent and computer controls. Bosch backs its heater with a 12-year heat exchanger warranty and 2-year parts warranty.
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| Customer Reviews: Read 6 more reviews...
 Bosch will break your heart and empty your wallet October 17, 2008
Green Reviews (Philadelphia, PA United States)
Save your money.
I bought and received the Bosch from Amazon and didn't get what I bargained for. Prerequisite projects included:
1- installing a new oversized gas line ($350)
2- z-flex thimbles and wall venting for the Bosch exhaust gases($500)
3- Mounting the heater on the newly framed basement wall ($300)
4- New plumbing and PVC air intake ($400)
Since the heater needs a .8 gpm minimum flow to turn on its burner, you can't run faucets or showers on low settings, and tasks that call for short bursts of water need to run longer to pull hot water through the line from the unit to the faucet. It will definitely waste more water than the old tank.
The heater worked the first time out of the box, BUT it makes a loud whistling sound when a single shower or appliance is calling for hot water. How loud? You know those sirens the local volunteer fire companies use? Well, that's what the neighbors compare it to.
Now for the really disappointing part. Although online readers can figure out this is recurrently a problem by searching other's reviews in a few minutes, the folks at Bosch Water Heating in Waitsfield, VT acted like this is not a known problem nor did they have any helpful solutions. We had already done every diagnostic they recommended before contacting their technical support line.
After wasting over an hour with customer support , they offered to call a a different plumber out to troubleshoot the gas/air calibration of the unit as others have reported in their reviews. I questioned why that would work any better for me than for the others and the Tech rep just fell quiet.
Hmm, sounds like a similar problem that lots of others have now posted, with a similar ineffective suggested solution from Bosch. Why is Bosch treating us like they've never heard of this problem rather than just offing customers a fix, or better yet recalling these things off the market.
Problem from Day 1- Don't Buy September 22, 2008
David A. Urban
1 out of 1 found this review helpful
We had this unit installed by a professional plumber- and with all the venting necessary, a costly install. After our first unit had to be replaced because of a myriad of error codes, second unit was installed (we had to pay labor). Replacement unit created intermittent cold/scalding hot water problem, and plumber made another visit, where he installed a new gas line, thinking the unit was not getting enough gas. That didn't solve problem; turns out it was a flow restrictor in shower head- about a 15 minute fix.
It has worked fine for a year, but now I am getting EA and EC error codes, and we have to power the unit on and off to get hot water. Even that isn't working now. I am going to cut my losses and buy another one at this point- don't even want to look at that thing anymore.
Oh yeah- customer service is terrible, from what the plumbers have told me. They wait on hold while the clock ticks.
One of the worst products I have ever bought. Bosch should stick to electric razors.
2400EO August 4, 2008
Disgruntled Bosch Owner
1 out of 1 found this review helpful
1st unit had EC errors. Horrible support but finally shipped a replacement unit that worked 2 days before getting EA errors. Now in the process of trying to get a full return.
Support blamed incorrect installation and had me run a complete new gas line at a cost = to the cost of the unit as expected the problems did not go away.
Support wanted to know if it was possible the unit had been rained on because getting wet could cause these problems. HELLO It's and external unit! Of course it's been rained on.
Save yourself the trouble, choose another brand.
worst purchase ever July 30, 2008
Timothy Murray (Davenport, Ia USA)
1 out of 1 found this review helpful
We have a Bosch tankless water heater, model 2400E NG. Our original unit was purchased at Menards in 2005. The water heater has been replaced by Menards three times after each unit exhibited the same problem. At issue is that the unit will produce water temperatures in excess of 140 degrees F while set at 100 degrees (minimum setting). The water heaters work reasonably well when new, but within a few months begin to run more and more erratically.
All attempts to get warranty service or technical support from Bosch have failed. The problem appears to be related to the hot water temperature sensor or the sensor control loop. I have had some luck by re-seating the temp sensor on the copper pipe downstream of the heating element but within days of moving the sensor, the heater begins to act up again.
When we originally installed the water heater, we had to reconfigure our house's water supply pipes and install exhaust venting through a basement foundation wall at considerable expense. Switching back to a conventional heater will cost even more money.
For now, there are three adults living in our home that have become adept at making quick temperature adjustments during showers but I worry about someone, like a visiting child, eventually getting burned. The temperature spikes are so high that it's often impossible to add enough cold water to achieve a comfortable shower. To make things worse, the heater will shut off if we significantly reduce the hot water flow by adding much cold water to the mix. This problem appears to be worse in the summer when inlet temperatures are somewhat warmer. While there are not as many extreme temperature fluctuations in the winter, they never completely go away.
The web is full of reports from others regarding their problems with these heaters. I'm contacting the Consumer Products Safety Comission. These products are dangerous.
I can't possibly express the level of my frustration with Bosch. Please Amazon, stop carrying this junk.
Satan's water heater June 19, 2008
Not born yesterday (Illinois)
2 out of 2 found this review helpful
If I could give this a negative star I would. You could never let a small child take a shower with this thing even when it worked ok, any flow change and it goes completely cold or hot. What a piece of junk, customer service is non-existant. Three service calls and its still leaking, water so hot you can't stand it, trouble codes in the LCD screen, had the software updated. I had to have it replaced with old fashioned tank type heater and I am getting the states attorney involved, I'm out 2000 bucks over this thing. DO NOT BUY ONE!!!!!
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