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    Efficient Water Heaters

    4.4 (772 reviews)
    Open 6:00 am - 10:00 pm
    Updated 1 week ago

    Get pricing & availability

    Response time

    10 minutes

    Response rate

    100%

    Services - Efficient Water Heaters

    Water heater installation

    Water heater repair

    Efficient Water Heaters Photos

    Recommended Reviews - Efficient Water Heaters

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    Reviews With Photos

    Old tank. Date was 2002.
    Robert Y.

    Great work. Props to Omar who worked on thanksgiving. They were rated good on yelp and their quote was in the middle of the three i received so I went with them. Upon arrival, he laid down tarps on my floors to protect against damage and dirt. He then did a removal of the old 50 gal tank, cleaned all the debris under and adjacent to the tank. After, he did a super clean install of the new one. All the flex pipes were routed nicely. Additionally if you look at the old tank, the gas line was installed doing a 180 to attach it to the tank. The new tank was done right. I am glad I went with Efficient Water Heaters and will definitely use them again if i am in need.

    Yelp Messages from Joseph, the owner

    A month ago I put out a call via Yelp to get my tankless water heater flushed. I got a number of instant replies and chose Efficient Water Heaters since they said they were experts in Navien brand tankess which sold me on using them and their quote was similar to others. I was doing some DIY research and saw that pumping vinegar through the system is how the system is typcially cleaned out. I was really concerned and screened for only natural products to be used. Joseph's reply via Yelp's message is below. I clearly asked and he tersely replied that he only used "natural" product and it was citrus based. Ok, great. I booked an appt. Well, once his tech got to our house and we asked to see this unknown "citrus" product that Joseph was annoyed that we asked twice about, it turns out it was Lime-Out -- A CHEMICAL and CAUSTIC agent! The Navien folks, when asked, even tell techs to NOT USE this product, it will damage the internal parts of your water heater!! We called Joseph to confront him on why he was having his tech use this and he HUNG UP ON US! He was also changing his pricing on us as well and luckily we had printouts of our text messaging with pricing from Yelp. The Lime-Out would have "worked" in that we wouldn't have known for months that the Lime was eating away at our water heater's innards plus we'd have trace amounts in our hot water lines in our home. The owner will say "Everything is false." No true. We short paid him by $81 for the work but we were trying to talk to him and he hung up on us so we couldn't. So unprofessional. I'm sending him a check for the rest, this wasn't about the money. I do want to say that he and his team do know about water heaters. This complaint is about him using the wrong product for flushing, one that would have damaged our water heater over time.

    Great service from Omar! A little bit later than our appointed time but they did call after and came at new specified time. Was not far from original time. From there everything went well. Installed in timely manner and communicated what needs to be done and the time for finish. As time progresses hoping to see the continued great service from them!

    40Gal installed a few months ago. Thankfully Marcos made it fit! Pic taken today, it is dusty now but it was clean when installed!
    Melanie S.

    Once again, excellent service! Jospeph answered my emergency call yesterday and today Omar came out to replace my water heater with a new tankless water heater. Excellent customer sevice, clean professional installation. I am extremely happy and feel this is an amazing company that I trust.

    New Water Heater

    Joe and Frank replaced my 20 year old water heater the morning after (on a Sunday) and it was professionally installed, cleaned and tested. The price was reasonable based on the range of quotes. Super thankful to Efficient Water Heaters for the prompt service and minimizing the inconvenience.

    Rheem standard water heater
    Marian Y.

    My water heater was old and leaking and need to be replaced asap. Joseph gave me the best quote out of the few I called. I relied on the Yelp reviews to give me a good sense of the better ones. Joseph was able to respond quickly to my questions. The appointment was made early the next morning. Joseph and his co-pilot were on time, finished the job in less than 2 hours, including cleaning up. I was also shown how to operate my new water heater. I would highly recommend this company to use for your urgent needs.

    Really Unreliable -- Would Not Recommend This company is seriously not punctual. Our first appointment was supposed to be 8-9 AM. Close to 9, I called them, and they suddenly told me they wouldn't come until 10 AM. I had other plans and was forced to move everything to the next day. Second appointment, we agreed on 9-10 AM, and I clearly stressed the importance of being on time. Still, they kept pushing it back: 8:47 AM -- changed to 10:30 AM. 10:16 AM -- changed again to 12 PM. Almost 1 PM -- still nobody; when I called, they told me 2 PM. At this point it's obvious they don't respect customers' time at all. Super frustrating experience. Would not recommend. According to the business owner's reply, continue commenting: This company is extremely dishonest and shows zero respect for customers' time. I even agreed to their ridiculous request to expand the original one-hour appointment window into a three-hour window. And still, they showed up four hours late, and I only found out about the delay because I called them -- that's when they suddenly told me it would be sometime after 2 PM. The technician who eventually arrived told me his boss only informed him about this job 20 minutes before. So the owner claiming "we communicated with you" and "we arrived on time" is simply not true. If a company cannot even manage its schedule properly, how can customers trust them with something as important as a water heater? Absolutely would not recommend.

    Brand new water heater! Omar was super fast very communicative the best

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    3 months ago

    Arrived quickly, found and fixed issue, fair pricing. Would happily work with this company again.

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    Joseph C.

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    1 month ago

    Installed a Bradford White water heater. Quick and efficient install. Quick reply from yelp project

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    1 month ago

    I called Efficient Water Heaters for my Rennai water heater maintenance. Joseph came on time and did the service. Great work! thanks!

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    4 months ago

    Great service. Responded very quickly scheduled the next day. Great follow up. Fair pricing I highly recommend efficient water heaters.

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    3 months ago

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    Joseph C.

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    4 months ago

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    3 months ago

    Went on site and installed a new water heater in a few hours today. Did a great job. Got the hot water working for everyone. Thanks!

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    Ask the Community - Efficient Water Heaters

    Is a permit required to replace an electric water heater in Sunnyvale that is same size as previous one? I read that only gas water heaters or major modifications requires permit in CA?

    Yes but optional. We never pressure anybody into pulling permits. We just offer them for an additional price. The reason why we don’t pull permits. Some of the times is because the owners themselves do not want the inspector at their home.

    How much would a natural gas tankless water heater installation cost?? I already have the water heater and an old 2011 gas water heater is currently installed.

    1500$. Cash only. Depends on what your looking for. Permits are more as well only if you want one

    How much to flush a gas water heater?

    150$. If you’d like to get on the schedule today and it’s easy accessible in the garage send over your full name, property address and your best telephone number. We will email you back and get somebody out there this afternoon thank you, Joseph… Read more

    What do they charge for a standard gas water installation? I hv the water heater already

    800$

    Don’t See Your Question? Ask Away!

    Review Highlights - Efficient Water Heaters

    Joseph and his team were very professional and quick in recommending a new unit and installed in within 1.

    Mentioned in 434 reviews

    Read more highlights

    Water Heaters Masters

    Water Heaters Masters

    (833 reviews)

    I am still in the research process for this project, but I can say how impressed I am with Water…read moreHeaters Masters. They responded to my request so fast I thought it was a bot, but it wasn't. A real person called and left a message. I called back to explain what I was interested in and he scheduled an appointment for that day (I think). I was assured that I'd be called or texted when the technician was on his way. I expected to have to wait the full 2-hour window I was given, but no! I was called about 5 minutes before the window started to see if I was still available. The technician arrived exactly on time, right at the start of the window! After a short explanation of my needs he just said "OK, let's take a look at the space and talk about it." He explained every step of what they'd do to install a tankless water heater, he looked at the whole area to check for pipes, electrical access, spacing inside and out for a condensation line - making feel very comfortable that it would be planned before the installation to avoid last minute issues. A big plus, he told me he'd be part of the installation team. He also told me I should go ahead and get another few quotes. I think these guys are confident they're giving the prices in the sweet spot of costs. Then we spent time just talking about landscaping and plants! I'm not in a hurry to start this project, it's on my list of improvements and I'm just starting to investigate. However, I'm extremely impressed with the service given at this stage, the thorough approach in explaining, and the honestly. I will get another quote, but the next one has a high bar to cross; not only the service, but Water Heaters Masters quote was WELL below the only other quote I had gotten so far. I have a very good feeling about WHM. I'll come back to let you know more when I've finished the whole project.

    After a frustrating experience with another company, I'm incredibly grateful I found this team…read more My water heater started leaking from the second floor into the first, and I needed help fast. From the moment I called, they were responsive, professional, and honest. They were able to come out within an hour, which was a huge relief given the situation. The technician quickly assessed the problem and gave me a straightforward, fair quote $2,300 to replace the water heater, which was significantly lower than what another company had tried to charge me. No pressure, no upselling, just clear communication and solid work. They completed the entire installation in about two hours, and everything has been working perfectly since. You can tell they know what they're doing and respect your time. What really stood out to me was their honesty. I asked what they would have charged to replace my laundry room valves (something I had just paid way too much for elsewhere), and they told me around $350. That level of transparency says a lot about their integrity. If you're looking for a company that is reliable, reasonably priced, and professional, I highly recommend them. I'll definitely be using them again for any future plumbing needs.

    Efficient Water Heaters - waterheaterinstallrepair - Updated May 2026

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