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Jun 22 '11
Pros: Endless supply of hot water. Space saving design.
Cons: No one seems to know how to service them. Endless repairs.
Summary: We bought our Bosch Tankless water heater five years ago after building our first new home. We had two teenage daughters, and were excited about the endless supply of hot water and were impressed with the Energystar ratings. Well, it didn't take long ... read more
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May 12 '10
Pros: Small footprint, water heats quite quickly and never runs out, decent gas savings.
Cons: Proper installation is key, routine maintenance is required, you will spend more up front.
Summary: I purchased a new Bosch 125B NG for about $300 on a great sale. It replaced my old 40gal tank heater from the early 1990's that was starting to leak. On the whole, I could not be happier with the unit. My wife and I are thrilled! But, as others have ... read more
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Jan 22 '10
Pros: A very long hot shower is always available.
Cons: Lack of qualified companies that install or fix a unit that has quit.
Summary: Warning – Technical Support at Bosch is an absolute nightmare! Before you buy this product, do yourself a huge favor and call their customer support line to see how long it takes to get the help you need. I averaged sixteen minutes to ... read more
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Dec 30 '09
Pros: Endless hot water when it works!
Cons: Unreliable, inconvenient, over-engineered.
Summary: I built my dream house and immediately planned for a tank-less water heater. Designed the plumbing system for it, had a special place built in the house for it, and decided on Bosch because of their good reputation in the automotive industry. One morning ... read more
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Dec 18 '09
Pros: Constant hot water. Nice for taking really long showers or when company is over.
Cons: Just read the main review.
Summary: I've owned this model for about 5 years now, after buying it to replace a worn out 40 gallon tank. Buyer beware...the $500 purchase price does not reflect the full price to get this unit up and running. You can offset many of the costs if ... read more
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Sep 15 '09
Pros: hot water all the time
no tank so you have extra storage space
hangs on the wall
Cons: maintennance is high-quality of plastic parts and glues are questionable-expensive parts
Summary: this unit is less than 4 years old - every year for 4 years the carbon builds up so it has to be regularly cleaned in order so that it can ignite -On a second visit the plumber decided to give me his steel cleaner and he showed me ... read more
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Oct 27 '08
Pros: Lowest cost in it's class. Hmmm it's the only one in it's class...
Cons: . If you like Russian autos, you'll love this.
Summary: Having installed tankless for decades my experience says use this for one fixture at a time and do your homework before purchasing any tankless. If you do not feel you can service this, do not purchase it. In hard water after a few years of no service, ... read more
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May 13 '08
Pros: Available at Lowes for a good price
Cons: Bosch said I should PAY a plumber to repair new heater!
Summary: My first Bosh water heater I bought from Lowes. I paid $150 to have it installed and we were not able to get it lit. After it would not light I called Bosch they wanted me to pay for a plumber to come out and repair it.I asked the operator if they would ... read more
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Apr 22 '08
Pros: Endless hot water.
Cons: Hard to control temperature + other high costs.
Summary: I have had this unit for about 6 years. I was happy once I go over the installation and it was all said and done. We did enjoy not running out of ho water but there are some huge trade offs. You will immediately notice that you cannot control the amount ... read more
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Mar 22 '08
Pros: tankless
Cons: 2 holes to the outside, quality is poor, size, breaks often.
Summary: had it for quite some time and would not buy it again. Too little for more than 1 bedroom house, breaks often, repairs and replacement parts are not so easy to find and expensive. when installing have to make 2 holes to the outside because it needs to ... read more
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Mar 06 '08
Pros: you have Pro & has done 5 installs/give him your info-he'll know.
Cons: No Pro you're taking chances. if it was your wifes suggestion, you might have chance.
Summary: My experience was in my own home. I could hardly wait for my water heater to go out... my 40gal. track-house unit lasted 18yrs. I purchased mine from home-depot, and bought the highest output rated unit they had. My problem was wife and Daughter.. It ... read more
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Mar 01 '08
Pros: Pros: Endless (but limited volume of) hot water, smaller than tank.
Cons: Cons: Temperature surges, expensive, maintenance
Summary: Note: I don’t own this hot water heater, but I own a similar one. The comments I make here apply to all tankless heaters, regardless of brand. These are things you should consider before making a purchase. They are also things you won’t hear from the ... read more
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Jan 23 '08
Pros: Space and energy savings in the long run.
Cons: Installation hard, won't notice any savings right away, can't to many things at once.
Summary: When I moved into my house over a year ago the first thing that I had to do was replace all of the plumbing. Then I noticed that I needed a new water heater. We originally had a 40 gallon heater. I really would like to have a 50 gallon one. I shopped ... read more
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Jan 11 '08
Pros: It saves space. It's cheaper than any other tankless heaters I've seen. It's energy efficient.
Cons: Difficult installation. Temperature varies. Faucet must be fully on to operate (no hot water trickle).
Summary: The following review was my initial opinion of the Aquastar 125B. I have updated the title and pros/cons to better suit my current opinion but I'll leave the review alone because I think it helps illustrate how this heater can take some dialing in and ... read more
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Dec 18 '07
Pros: Good for the environment, save energy, no standby losses, compact.
Cons: Often don't meet high water demands of North Americans, need maintenance plans factored in.
Summary: Tankless, gas-fired, instantaneous water heaters have been trying to break into the North American markets since the late 1970's and early 1980's. It therefore isn't "new" technology, as countries like England, Germany, and Japan have all been ... read more
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Nov 05 '07
Pros: none
Cons: EVERYTHING! wastes water, won't stay lit, unethical tech support behavior
Summary: Since the purchase of this faulty water heater, it has never worked right and has been a persistent problem. It can shut off 3 times during a single shower, or the pilot light may extinguish when not even in use. For years I have been on the phone ... read more
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May 13 '07
Pros: Energy savings, space savings, continuous hot water on demand, long life, earthquake safe.
Cons: I had one service call during the last eight years.
Summary: I have used a Bosch Aquastar 125 in my home serving a family of four for more than 8 years. This water heater works like a spa water heater by heating water as it senses water passing through a heating chamber. It is "on" only while the water is ... read more
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Dec 30 '06
Pros: good for cottages, one person house holds, for spatially challenged areas.
Cons: Horrible: Output GPM, COST of Unit, installation, maintenance.
Summary: I've installed one in my home also. At first I was satisfied, but now I have grown annoyed with the heater. No one else in the household can use the hot water while you’re in the shower, or else you will get doused with cold water. Also, it takes ... read more
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Dec 10 '06
Pros: Absolutely NONE
Cons: Expensive, wastes water, no tech support, EXPENSIVE to call plumbers who know NOTHING
Summary: I just built my "dream home of a lifetime" - Chattahoochee Riverfront in the North Georgia Mountains. We wanted our home to be top quality, state-of-the-art. We did research (Not as much as we SHOULD have, turned out) and bought the Bosch Tankless ... read more
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Nov 28 '06
Pros: space saver, illusion of continuous hot water
Cons: cost, high maint., poor performance, horrible service, low water pressure.
Summary: The 125 has a plastic water valve, replacement part is $150 for another piece of plastic. Mine exploded less than 3 years after installation, but after the 2 yr warranty on parts had expired. The box gloats of a 15 yr. warranty if professionally ... read more
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Nov 12 '06
Pros: small size, no pilot light
Cons: water not HOT, no service, and too expensive for a boat anchor, probably floats.
Summary: I have a Bosch AuqaStar and installed it to save money and "do the right thing energy-wise". What a mistake. I could have bought at least conventional water heater for what I paid for the tankless. I could live with that if it was a money saver. It ... read more
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Oct 08 '06
Pros: Inexpensive for a gas tankless. Works well. Saves space.
Cons: Pilot light instead of electric start. A lot of work to install. Require maintenance.
Summary: After 11 years, my 50gal gas water heater started leaking. I shopped around for alternatives, and decided that tankless was too expensive. I was at Lowe's to buy a new tank for $338, when I saw the Bosch 125B on clearance for $369. It's normally $499, ... read more
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Aug 17 '05
Pros: Smallest hot water heater, unlimited hot water, runs two showers at once.
Cons: Cost, Maintenance and Installation
Summary: I like this thing. Sure it's expensive, requires maintenance and was a real challenge to install, but it saved a ton of space. I now have a hot water heater, microwave, dishwasher, a little counter space and 3 shelves in the same space that used to ... read more
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Aug 11 '05
Pros: Constant hot water if you like to be scalded.
Cons: Demands consistent cold supply water
Summary: At first we thought "what a great idea... saving money and energy", but the cons out weight the pros of this unit. We bought the Bosch Aquastar 125BNG tankless water heater from Home Depot to replace our still running 21 year old 40 gallon water heater. ... read more
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Mar 04 '05
Pros: All fixtures are low flow we can run two showers simultaneously with no problem.
Cons: WARNING: Check CEC web site required maintenance every 2-5 years. High maintenance cost!!!!
Summary: Had this product installed in a new house when built. Cost was a little higher than conventional hot water heater, but I believed that they would be outweighed by the long term benefits. Having been stationed in Germany for seven years, I had a lot of ... read more
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Feb 18 '05
Pros: Takes up next to no space, endless hot water
Cons: A bit difficult to install yourself
Summary: Here’s the scenario: One Sunday morning, I took my usual shower and noticed the water was tepid, not hot like I prefer. As I got ready to leave the house, I mentioned to DH that either The Child had run us out of hot water (yet again) when he took ... read more
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Oct 20 '11
Pros: small
Cons: TERRIBLE customer service, faulty product not once but twice!
Summary: We have not even been in our newly built home for 3 years and we have already had to replace the unit not once but twice!! Last summer we went 1 month with constant problems and little to no hot water before finally diagnosing the problem-- the whole
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Mar 07 '11
Pros: Plenty of hot water, once it gets there.
Cons: Tremendous waste of water. High repair costs. Forget customer service.
Summary: We have had our tankless water heater from Bosch for a little over three years. In that time we have noticed very little decrease in our natural gas usage, but a hugh increase in our water and sewage bills. While the company portends that
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Oct 17 '10
Pros: Storage size
Cons: Hot water not consistent.
Summary: We bought a Bosch 250 about 3 years ago. Unit was costly and installation was expensive. As with many of the complaints you've probably read, I cannot run hot water anywhere else in the house if I plan to use the shower. Since the
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Jan 18 '10
Pros: Lower cost of energy when they work
Cons: They are absolutely unreliable and the company provides unacceptable support.
Summary: From a current owner of a Bosch Tankless Water Heater. Do not buy one. The first unit we installed failed often with EA errors (No flame ionization detected with water flow) and had to be replaced. The second unit worked for a year
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Jul 02 '09
Pros: endless hot water.
Cons: less flow and one shower a time.
Summary: I had this water heater for 10 years. The reason I got this water heater is that I am not strong enough to handle 50 gallon water tank. My son helped me remove the old tank and still dented on the garage floor. Took me couple hours to install
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Apr 26 '09
Pros: No wait between showers/baths.
Trouble-free operation
Less expensive to operate.
Cons: Can be more expensive start taking REALLY LONG showers.
Summary: This unit was a bit of a pain to install because of the larger vent requirement, but wasn't a major issue.I have owned this water heater for 9 years, and have never had any trouble with it. I do have to adjust the temperature twice a year, once
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Feb 10 '09
Pros: Never a problem other than that.
Cons: Heat exchanger replacement costs $250.00 or silver solder repair $60.00.
Summary: Owned for 10 years--only bursts in winter. Used double wall vent pipe, six foot horizontal run before exterior wall penetration and vertical run six foot outside. Return line burst three times in past in same location. Is it cold
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Jul 29 '08
Pros: saves lots of energy when you can only take a 3 minute warm shower
Cons: Sometimes I need more than 3 minutes of warm water, replace old gas lines
Summary: I have seen similar reviews from people who have had the same experience as me. The water starts cold, warms up, then becomes scalding hot (without me changing from the "warm" setting), and when I try to put it back to warm, it shuts off all hot water.
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Feb 26 '08
Pros: Lots of HOT WATER
Cons: Non-returnable new parts, no money savings and could fail
in a short time.
Summary: I purchase a Bosch Aquastar system hoping to save money. So far the system Cost has outweighed any benefits. The system cost with taxes nearly US Dollars $2000.00 The installation for Pipes (certain size and stainless still exhaust installation by
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Jan 30 '08
Pros: Space saving and saves energy.
No electricity required.
Cons: Costs more than a tank water heater.
Summary: Endless hot water in the shower / bath and I was surprised how much money it saves me. I switched from an electric hot water heater with a tank and I am saving about 30% on the energy. This is a reliable unit. I have it installed in a pumphouse with
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Dec 28 '07
Pros: Endless hot water. Energy savings. Takes up almost no space.
Cons: Somewhat more complicated than your ordinary tank heater.
Summary: After replacing an old conventional water heater, we have depended on the Bosch 125B for over one year. Like with all technical products it is important to understand how they work. It is fair to say that a tankless heater is more complicated than one
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Aug 22 '07
Pros: Takes up little space, can't shower and run water in other areas at same time.
Cons: Terrible customer service, hardly any licensed repairmen, expensive.
Summary: We've had our Bosch for just under 3 years and it worked fine until the last six months. Suddenly the hot water is only intermittent. My husband, who is a licensed plumber, installed the unit and called customer service to get advice on what might be
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Jul 12 '07
Pros: none..does take less space
Cons: read above
Summary: Customer service is horrible for one..Takes forever to get tech support...They battery on the phone runs down or the lunch hr is used up.. The product is lousy for another..the housing around the control panel cracked and water was seeping out causing
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Jan 14 '07
Pros: Nice idea when it works
Cons: bad company {both Bosch and Solarbiz}, many error codes have to reset often
Summary: Nice idea bad company: I bought two of these units {Bosch 240sx} from an online dealer {Solarbiz} (Big mistake: I would suggest buying from the same people who are to install the unit) He didn't want to know me when I had a problem after the sale. He
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Dec 24 '06
Pros: space saver
Cons: tempermental, doesnt work holidays or weekends. tech support sucks
Summary: what a mistake, a $1,000.0 plus mistake. i installed this 7 months ago. the first week is made a loud whislting noise through the vent the whole neighborhood could hear. I called the tech line, waited on the phone for 1 hour. he told me to make an
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Oct 24 '06
Pros: None
Cons: Too many to mention here.
Summary: Tankless water heaters should be avoided like the plague. Any gas savings will be offset by enormously increased water bills. In addition, you get to stand around at the sink or shower waiting for the water to heat up -- what used to take seconds in our
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May 21 '06
Pros: Endless hot water; space saving; reliable.
Cons: Must not flush toilet/fill washer while someone is showering - reduces cold water pressure.
Summary: I had this water heater (then made by e.l.m.) installed early in 1995. I had it professionally installed as I did not even have a gas outlet or flue in the room. It has been worth it's weight in gold; we have showered by candlelight when the power was
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May 05 '06
Pros: Energy efficient. Never run out of hot water!
Cons: Sensitive to water pressure--turning on too much cold water and the heater shuts off.
Summary: I have had my AquaStar 125B for 3 years. I bought it mainly to save space as my 30 gallon was blocking part of the door into my utility room. I had it professionally installed but even this was a difficult and lengthy process. The installer had to
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Dec 16 '05
Pros: it is tankless
Cons: very high maintenance and expensive to maintain
Summary: It is nice when it works, but it breaks down a lot. Most plumbers don't know how to fix it, and even if they are willing to learn they charge you the hourly rate for their education. Service from the manufacturer's representative is quite poor. Parts are
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Sep 29 '05
Pros: limitless hot water, silent, saves energy, compact
Cons: handheld showers can go cold if the pressure isn't constant
Summary: We got our tankless hot water heater about two years ago primarily to do our bit to help the environment by cutting down on energy use. We have been happy with it so far with no problems. It does indeed give limitless hot water although sometimes the
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Jun 26 '05
Pros: Compact size, delivers continous flow of hot water when working.
Cons: High maintainence, energy factor of the 125b is the same as well-insulated tank.
Summary: Installed a 125b 3.5 years ago. I choose tankless due to the need to install a unit in a small space and the potential energy savings. The unit generally works well but the pilot light goes out about 3 times a year with the need to clean the pilot
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Jun 05 '05
Pros: Tankless concept looks great on paper
Cons: 1.Water temperature fluctuates,cost too high
Summary: Talk about planned obsolescence-We purchased an Aquastar 240fx just 2 years and 4 months ago. The only ting that's under warrenty after that is the heat exchanger.The unit came up with a flashing light and cold water yesterday. I was on hold almost an
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Apr 22 '05
Pros: size (NO bulky tank), endless hot water even with power outage, low bills, low maintenance
Cons: short duration of decreased water flow if another appliance/person uses at same time
Summary: Have had the unit for 6 plus years in our vacation house we use every other weekend. I LOVE IT! PROS: --No more fear of using up all the hot water when someone is taking a bath behind you. --Hot water even if the electric power goes out! --The first
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Apr 12 '05
Pros: Provides all the hot water I need,energy efficient and space saving.
Cons: Installation is time consuming.
Summary: I purchased a 110 gallon therapy tub and my 40 gallon heater just didn't cut it. The recovery time took almost 2 hours to fill at a 108 deg temp. After installing the 125B I filled the tub with 110 deg water in 40 min. The installation was harder and
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Mar 04 '05
Pros: Small space required for installation
Cons: Expensive to buy, install and maintain. Very limited service support for the product.
Summary: I have owned an Aqua Star 125 for 8 years. Just recently converted back to a high efficiency water tank. During my period of ownership, I experienced high maintenance costs, poor service, and a lack of support from the manufacturer with problems.
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