4.5 kW 110v Electric Tankless Water Heater Ultra - Instant On-Demand Under-Sink Point-of-Use Heater for Bars, Hair Salons, Touch, CSA Certified with LED Digital Display
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30-day refund/replacement
To qualify for a full refund, items must be returned in their original, unused condition. If an item is returned in a used, damaged, or materially different state, you may be granted a partial refund.
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Availability:
In Stock.
Arrives
Wednesday, Oct 1
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Model: RE45K-U (4.5kW)
Features
- NOTEMake sure this undersink water heater is sized to fit your hot water needs: 4.5 kW; circuit breaker required: 1 x single pole breaker 40 amps, 110-120 V AC, no plugs. Electric water heater dimension: 9.06" x 2.34" x 6.7"; water connection: 1/2" NPT.
- UNDER SINK INSTANT WATER HEATERThis Uses a 4.5KW heating system 24/7, so instant hot/warm water is continuously supplied to your entire home at a preset temperature when needed. No standby energy consumption. No need to wait for the tank to fill.
- ADVANCED SAFETY PROTECTION SYSTEM With CSA certification, it is safe as per Canadian and US Standards. Features over-heating protection, low water flow protection, dry combustion protection, anti-freezing protection, high water pressure protection, and flame failure device.IPX4 waterproof. Stainless steel heating element, no water storage, prevents sediment/scale accumulation.
- VISUAL CONTROL FUNCTIONThe tankless water heater is equipped with a digital display and a touch control panel, so setting the temperature is easy. The intelligent display temperature is convenient for setting the appropriate temperature for different seasons and for using hot water.
- SMALL AND CONVENIENTCompared to tank water heaters, the mini tankless water heater is compact and does not take up space. It can be installed anywhere near the water outlet to avoid space waste and hygiene problems. Tankless water heaters support three installation methods: horizontal, vertical, and inclined installation. They are suitable for under sinks, kitchens, bars, hair salons, and communities.
Brand: Ranein
Power Source: Electric
Product Dimensions: 9.06"W x 6.7"H
Color: Gray
Wattage: 4.5 KW
Brand: Ranein
Power Source: Electric
Product Dimensions: 9.06"W x 6.7"H
Color: Gray
Wattage: 4.5 KW
Voltage: 110 Volts
Efficiency: High Efficiency
Mounting Type: Wall
Is Electric: Yes
Manufacturer: Ranein
Item Weight: 4.13 pounds
Item model number: RE45K-U (4.5kW)
Included Components: water heater
Batteries Included?: No
Batteries Required?: No
Date First Available: February 13, 2025
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Wednesday, Oct 1
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.
To initiate a return, please visit our Returns Center.
View our full returns policy here.
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Top Amazon Reviews
Model: RE8K (8kW)
I recently purchased the Ranein 8kw water heater for our guest house. We are using this for a single shower and two sinks. The unit arrived quickly. It was easy to install and has a very thorough display with what seems to be high quality components. We used the template to place the mounting screws and mounted it under our kitchen sink. So far it works great, the price was excellent, the water temperature will get much hotter than we need it at this time. We did not experience any leakage after install. I expect this will be a great addition to our guest house.
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Reviewed in the United States on July 7, 2025 by Eric
Model: RE13K (13kW)
Why did you pick this product vs others?: This product is an excellent excellent by affordable works. Great throughout the whole house. Have no problems. Whatsoever, I found it by reading the reviews so you can trust the good ones. Or you can trust the bad ones.
Reviewed in the United States on July 8, 2025 by Tony Varlas
Model: RE8K-U (8kW)
Ordered the Ranein 8KD tankless electric water heater in our small cabin. It was an easy install and get the water plenty hot enough to shower as well. Very pleased with the product!
Reviewed in the United States on July 13, 2025 by Wesley Wilbers
Update: Was contacted through Amazon by the company after we already started the refund process. I deletes the email. Then was called on the phone by the company in the middle of my work day. Told them if the contract myself or my husband again we will take legal action for harassment. I say it again DO NOT BUY FROM THIS COMPANY. We bought this product hooked it up. Tried to program it, all it did was beep. Tried you tube videos and even videos from their web site. Then Tried to live chat them only got a robot for over 2 hours. Tried to call them, left 10 messages. Emailed them 3 times. Left messages on their Facebook, Instagram and Twitter or X. Nothing. Product is being removed from our house and returned. DO NOT BUY THIS PRODUCT!!!!!!!! Only gave it one star because I couldn't post this. Again DO NOT BUY THIS!!!!!!!!
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Reviewed in the United States on August 9, 2024 by Amy Glovier
I had the unit installed by professionals, a plumber and an electrician. Installation was pricey. When all was done it wouldn’t turn on. With electrician standing by I called customer service several times but reached voicemail. I left a few messages. I also sent an email asking for an immediate call back. This was at 1:30 EST on a weekday. The electrician kept messing with it, shutting off breaker, unplugging the circuit board, etc and thankfully it finally came on. That was two days ago and the company has not returned my calls or even my email. The water heater works but customer service is lacking if there is a problem. I’m giving three stars since it’s working now, fortunately. If I had to have the electrician make another house call and had to take cold showers while waiting for a response it would be zero stars.
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Reviewed in the United States on October 11, 2024 by Marathon Mama
Model: RE8K (8kW)
This water heater is an affordable option to anyone needing to replace theirs. It was an easy install. The water heater is small in size and fits just about anywhere.
Reviewed in the United States on July 14, 2025 by Shaun Ramsay
Model: RE13K (13kW)
nice quality. Good price. Haven’t installed yet but we have another one in cottage and love it !
Reviewed in the United States on July 7, 2025 by Rachel Young Combs
This 14 kw unit is about the largest I could put on to the existing 60 amp double throw breaker circuit. It seems well built and produces the hot water that we need but has kicked offline with an "E1" error more than once which, according to the manual indicates insufficient flow for the set temperature. Flipping the breaker off and on resolves the immediate lack of hot water. If it happens again, I'll try setting the temperature slightly lower, at 120F instead of 122F. It could be that our house uses an on-demand pump to drive water around the house, including to this on-demand heater.
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Reviewed in the United States on July 18, 2024 by Mary F. Phillips