Bosch AquaStar 125B NG Natural Gas Tankless Water Heater

Bosch AquaStar 125B NG Natural Gas Tankless Water Heater

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  • Excellent! If you understand what you are getting.

    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

  • Is This The Way Of The Future?

    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

  • Bosch AquaStar 125B Tankless Water Heaters... Meet High Demand North Americans

    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

  • Bosch Aquastar 125 -- The modern solution to hot water

    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

  • When Size Really Matters: Tanks to Bosch, we're back in hot water

    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

  • Endless hot showers... How could you not love this thing?!

    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

  • Just installed mine. I like it so far.

    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

  • Bosch 125B

    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

  • nice if you are looking for low price, but quality is not there

    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

  • Bosch AquaStar 125B NG Natural Gas Tankless Water Heater

    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

  • WARNING - things you should know about a tankless heater

    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

  • I like it but I had to fix it

    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

  • Don't waste your money .

    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

  • Bosch Support is a Nightmare

    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

  • Ok Unit, If you're handy

    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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