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MIZUDO

Natural Gas Tankless Water Heater, MIZUDO 4.0 GPM, 90,000 BTU Indoor Installation Instant Hot Water Heater, Gen 2

    • Based on 33 reviews
Condition: New
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$439.00 Why this price?

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This item's return window has been extended for the holiday season: Returnable until Jan 31, 2025

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Availability: In Stock.
Fulfilled by Amazon
Arrives Saturday, Dec 28
Order within 11 hours and 16 minutes
Available payment plans shown during checkout

Material Type: 4.0GPM | 90,000BTU


Style: Natural Gas


Features

  • Quality Certification: It has passed CSA certification and has protection functions such as overheating protection and accidental flameout protection. It meets national safety standards and protects the safety of you and your family in many aspects.
  • Endless Hot Water: No need to wait for the water tank to heat up, it provides endless hot water 24 hours a day, allowing you and your family to use a steady stream of hot water at multiple locations at any time.
  • Precise Temperature Control: The internal movement can keenly sense changes in water temperature and intelligently adjust the water temperature to ensure that the temperature difference is within 1F.
  • Quality Material: The built-in oxygen-free copper water tank has excellent thermal conductivity and anti-corrosion effects, allowing the water heater to have a longer service life and achieve durability.
  • Product Information: Dimensions are H 22.8'' x W 14.6'' x D 7.0''. Compared with tank water heaters, it can save more than 50% of space. The interface is universal 3/4"NPT, which is easy to install.

Brand: MIZUDO


Product Dimensions: 14.57"W x 22.76"H


Special Feature: Comfortech 2nd Generation, 24/7 Customer Service, Easy Installation, CSA Certified


Color: White


Wattage: 20 watts


Brand: ‎MIZUDO


Product Dimensions: ‎14.57"W x 22.76"H


Special Feature: ‎Comfortech 2nd Generation, 24/7 Customer Service, Easy Installation, CSA Certified


Color: ‎White


Wattage: ‎20 watts


Voltage: ‎120 Volts (AC)


Maximum Flow Rate: ‎4 Gallons Per Minute


Efficiency: ‎High


Mounting Type: ‎Wall


Is Electric: ‎No


Manufacturer: ‎Mizudo


Item Depth: ‎22.76 inches


Item Weight: ‎30.2 pounds


Country of Origin: ‎China


Item model number: ‎FDG-CS90AG-NG


Special Features: ‎Comfortech 2nd Generation, 24/7 Customer Service, Easy Installation, CSA Certified


Included Components: ‎Gas Water Hetaer x 1, Manual x 1, Perforated Paper x 1, Assembly Kit x 1, Warranty Card x 1


Batteries Included?: ‎No


Batteries Required?: ‎No


Date First Available: January 13, 2024


Frequently asked questions

If you place your order now, the estimated arrival date for this product is: Saturday, Dec 28

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.

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Leasing options through Acima may also be available during checkout.

Learn more about financing & leasing here.

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Top Amazon Reviews

    • Great heater for the money
Material Type: 5.1GPM | 120,000BTU Style: Propane
Review Image by Jeffz Jeffz
I installed this in the cabin we live in about a month ago and so far it's been working well for us. The distance from the heater to the various taps is fairly short and there is a bit of a lag getting hot water to the outlets,but I believe that is more of a result of the "water saving" fixtures we are stuck with these days and their flow restrictive nature. Water temp fluctuations have been minimal. Though we have noticed some due to the lower temp of the incoming water to the heater after the water has run for a period of time. We have very cold water from our well. The unit is a little noisy,but that is far from our concerns. My only real concern is the water heater cycling when running the washing machine when set to a warm wash temperature. It runs for such a short period that the water doesn't really get an opportunity to heat and I feel like the rapid cycling is probably not good for the heater. I feel this is more of an issue with the washer than the heater. Our solution was to run the washer on a hot setting and reduce the temperature on the water heater. Right now we just have a whole house filter installed in the inlet. We did have a Water Drop scale inhibitor installed,but it leaked and had to return it to Amazon for a replacement. Definitely on the homestead priority list as we have very hard water. All in all we have been pretty happy with the heater. Super easy install except for cutting a hole in the logs for the vent. ... show more
Reviewed in the United States on May 23, 2024 by Jeffz Jeffz
    • Great workmanship
Material Type: 4.0GPM | 90,000BTU Style: Propane
I installed a 5.1 gpm in my RV. Couldn’t be happier. This was #2. As the first one had an issue. Amazon took it back and sent a replacement the next day. Works perfectly. Customer service at Mizudo was extremely helpful and friendly. Good choice to make!
Reviewed in the United States on July 28, 2024 by Ira A.
    • Works Great!
Material Type: 4.0GPM | 90,000BTU Style: Natural Gas
Review Image by Jordan F. Jordan F.
I have a small 1200ft house with just my fiancé and I. This works great for our needs! Do research on the install as it’s not your normal water heater connections. I placed a larger 4” metal dryer vent hood through the exterior wall then routed the smaller vent pipe for the unit through it (vent pipe is smaller, 3”, so it doesn’t touch the homes walls). Water pressure is great, heat is very good, the only caveat is if your turning on and off your water (say washing your face) it’ll have to shoot out the cold water from restarting before it gets back to hot. Overall great purchase as it also should save money from not having a lite water heater 24/7. If you have hard water (I don’t) then maybe install a filter in line or flush your unit once a year with vinegar. ... show more
Reviewed in the United States on November 20, 2024 by Jordan F. Jordan F.
    • Broken
Material Type: 4.0GPM | 90,000BTU Style: Propane
Showed up not working had to trouble shoot and find wires inside unit weren't plugged in all the way. Now it randomly shuts down and stops working. And im out side the 30 day window to return.
Reviewed in the United States on September 4, 2024 by Saundra Veyna
    • Pretty Big
Material Type: 4.0GPM | 90,000BTU Style: Natural Gas
Recently had a power outage for four days due to a storm, and if one happens to have an all-electric tankless water heater, one had better also have some sort of a generator in one expects to have any hot water. Sometimes gas is the better option, and if such is the case for you, this unit, or one similar may be worth a look. For what it is, what it does, and what it costs: Four Stars I am the Totally Unbiased Reviewer Dude (T.U.R.D.) and that is how I see it. ... show more
Reviewed in the United States on April 15, 2024 by Totally Unbiased Reviewer Dude
    • Arrived Fast. Easy to Install. Great Seller
Material Type: 5.1GPM | 120,000BTU Style: Natural Gas
Review Image by Amazon Customer Amazon Customer
This arrived very fast, which is good because my tank water heater died. After reading the instructions and looking at the unit I realized that the installation is very straight forward and fairly simple for any good DIY'er. The hardest part was removing my old 50 gallon Tank Water Heater. It fired up the first time and is working perfectly. I am adding a 2 Stage water prefilter in a few days to prolong the life expectancy of the unit.I only had to deal with the seller 1 Time since purchased, and they were quick to respond and solved my only issue immediately. For those that live in high altitude areas, I would recommend this unit for a 2-Bath home. Both of my showers run very well at the same time @ 6000 ft above sea level. I had to get a 1/2"NG to 3/4"NG converter and new 3/4' NG Line to connect to the unit, and am having no issues with NG Supply under heavy load. It only takes up 1/4 the space that my old water heater did. I am very pleased with the uniy, the seller and the service. :-) ... show more
Reviewed in the United States on July 22, 2024 by Amazon Customer Amazon Customer
    • Package came damaged.
Material Type: 7.5GPM | 170,000BTU Style: Propane
Review Image by Gary Greif Gary Greif
Review Image by Gary Greif Gary Greif
Review Image by Gary Greif Gary Greif
Didn’t open until ready to install and discovered it was damaged
Reviewed in the United States on August 3, 2024 by Gary Greif Gary Greif
    • Saves a fortune
Material Type: 4.0GPM | 90,000BTU Style: Natural Gas
Plenty of hot water for a small household and so inexpensive.
Reviewed in the United States on October 3, 2024 by Andrew Yates

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