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Mizudo Natural Gas Tankless Water Heater 4.3 GPM, 100,000 BTU Indoor Installation Instant Hot Water heater

  • Based on 56 reviews
Condition: New
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$379.00 Why this price?
Holiday Deal · 19% off was $469.00

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Availability: In Stock.
Fulfilled by Amazon

Arrives Sunday, Dec 29
Order within 11 hours and 15 minutes
Available payment plans shown during checkout

Material Type: 4.3GPM 100,000BTU


Style: Natural Gas


Features

  • Instant Hot Water HeaterTankless water heaters can provide endless hot water on demand for 2- 3 water points.
  • Comfortable Bathing Experience4.3 GPM hot water flow, precise temperature control, no water temperature sandwich.
  • Premium design and DurableAdopt oxygen-free copper water tank, reduce heat loss, high efficiency and durability.
  • Compact DesignSave over 50% of available space compared to tank water heater.
  • Quality ServiceIf you encounter product quality problems, you can contact us by phone, email and message, and we will provide service according to the warranty policy.

Brand: MIZUDO


Product Dimensions: 7"W x 20.5"H


Brand: ‎MIZUDO


Product Dimensions: ‎7"W x 20.5"H


Manufacturer: ‎MIZUDO


Item Weight: ‎25.5 pounds


Item model number: ‎FDG-CS100W-NG


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: July 19, 2023


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Sunday, Dec 29

Yes, absolutely! You may return this product for a full refund within 30 days of receiving it.

To initiate a return, please visit our Returns Center.

View our full returns policy here.

  • Klarna Financing
  • Affirm Pay in 4
  • Affirm Financing
  • Afterpay Financing
  • PayTomorrow Financing
  • Financing through Apple Pay
Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

Top Amazon Reviews


  • It works
Material Type: 3.6GPM 80,000BTU Style: Natural Gas
Simple, straight forward installation.. Works as advertised..
Reviewed in the United States on October 9, 2023 by Bill Mayers

  • Great product.
Material Type: 3.6GPM 80,000BTU Style: Propane
Good unit. We installed at our remote cabin. Flow rate through the unit must remain strong or unit will shut off. Our supply is from a holding and with an RV style pressure demand pump. Adjust desired temperature with addition or reduction of cold water rather than reducing the hot or it may shut off. Supplies very hot water if needed. Well built. Installation guide made it easy to mount. ... show more
Reviewed in the United States on August 4, 2023 by Ed

  • Wet inside plastic bag!
Material Type: 3.6GPM 80,000BTU Style: Propane
We just opened this yesterday to see what parts would be needed for the installation. Everything was very well packaged, but I noticed that when we opened the plastic bag, the unit was in was wet! It looks like someone else used it and then decided to return it. I paid for a new unit!! Unfortunately, my husband insisted on going ahead with installing it on Sunday instead of sending it back!! If all goes well tomorrow, I will reevaluate my review. Why was it wet??? I truly am upset since this is an early Christmas present for my son and his family! UPDATE: Oct12, 2023- It works great! So far no problems. Though if you run the water too fast it turns cold! Guess you don't need high pressure when filling tub, but a nice shower has lots of hot water with pressure...unfortunately, this is just OK for showers. ... show more
Reviewed in the United States on June 24, 2023 by Deb

  • Surprisingly small and light weight.
Material Type: 3.6GPM 80,000BTU Style: Natural Gas
My five-star rating could change as this unit has only been up and running for a week. It was on sale for an irresistible price so I took a chance. It is rated higher than others at its non-sale price point, but it lacked the number of feedbacks that I would normally like to see. I eliminate dumb 1 and two star ratings but still pay attention to them. At 4.3 with no issues that seemed to be a roadblock for me, it was worth a try. I live alone so 3.6 gpm is more than enough flow rate, and 80,000 btu is plenty. Even two people could be using hot water simultaneously provided those outlets are low flow imho. It responds fast for my plumbing distances and stays on point with no temperature waffling...yet. My slight lack of confidence is based on the age old "you get what you pay for" mantra, but sometimes you get a gem. Other than awkward grammar at times, the instructions were pretty clear. MAKE SURE you have a gas line that matches or exceeds the btu rating of the unit. That was not clear in the instructions ... show more
Reviewed in the United States on August 25, 2023 by Carl Baldwin

  • It works
Material Type: 4.3GPM 100,000BTU Style: Natural Gas
Very economical, and function fine. Use is on 1 bathroom and kitchen, works great
Reviewed in the United States on November 9, 2023 by Albert Leigh

  • Doesn't work as advertised
Material Type: 4.3GPM 100,000BTU Style: Natural Gas
This states a flow rate of 4.5 gpm but only makes 2.4 gpm. It will run sink faucet fine but can't shower or fill A tub. I don't recommend this product at all. And Amazon customer service is an impotant waste of time. The company is failing big time and I am severely limiting my buying from them.
Reviewed in the United States on November 28, 2023 by Amazon Customer

  • Super Prompt Quick Delivery, QualityProduct and easy install
Material Type: 3.6GPM 80,000BTU Style: Natural Gas
Amazon is amazing and has Amazing Sellers ! Freaking Amazing
Reviewed in the United States on October 2, 2023 by looks like me...

  • Adequate for the specific needs of this house
Material Type: 4.3GPM 100,000BTU Style: Propane
The device appears to be performing as expected so far, especially in consideration of the fact that it's a bit underpowered for the size of the house and summer requirements are much less demanding than those of the winter. The system is adequate for my needs, thus far.
Reviewed in the United States on June 14, 2023 by DAN BROESKE

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