APUS Tankless Water Heater Electric 240V, 4500W Instant On Demand Hot Water Heaters, Under Sink Point of Use Water Heater, LED Digital Display, Ultra Compact for Kitchen, Bathroom, Laundry,Black
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Availability:
In Stock.
Arrives
Monday, Apr 27
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Features
- Instant Endless Hot Water: APUS 4.5KW, 220-240V tankless electric water heater delivers hot water in 3 secondsno preheating or waiting! With a temperature range of 85F131F, enjoy consistent, on-demand hot water for sinks, kitchens. Perfect for single-point use, it eliminates standby energy loss and wasteful tank storage
- Smart Energy Efficiency: Our self-modulating technology adjusts power (99.8% efficiency) based on water flow and temperature, reducing energy waste. Unlike traditional heaters, APUS only heats water when needed, saving up to 50% on electricity billsno more paying to keep a tank warm
- Touch Control & Compact Design: Adjust water temperature with precision using the LED touchscreensimple, responsive, and user-friendly. The ultra-slim design (8.7" x 6.5" x 2.6") fits effortlessly under sinks, or cramped spaces, making it ideal for apartments, kitchens, bathrooms, and commercial setups like salons or cafes. No wasted space, no clutterjust instant hot water where you need it
- The APUS tankless water heater is engineered for safe, reliable operation with built-in overheating protection, dry-burn prevention, and anti-leakage technology. Its advanced internal shockproof system (anti-electric wall design) ensures extra safety by preventing electrical hazards. The high-quality cast aluminum heating element enhances durability while resisting corrosion and scale buildup, delivering long-lasting performance and peace of mind
- Easy Installation & Reliable Support: Easy Installation & Reliable Support: Pre-drilled holes and 1/2" NPT fittings simplify setup. Hardwired for 240V (requires 30A double-pole breaker + 12AWG wire). Backed by 24/7 customer service for worry-free ownership
Brand: APUS
Power Source: Electric
Product Dimensions: 6.5"W x 8.66"H
Special Feature: Dry Combustion Protection, Flame Failure Protection, LED Display, Lightweight, Overheat Protection
Color: 4500W,Black
Power Source: Electric
Special Features: Dry Combustion Protection, Flame Failure Protection, LED Display, Lightweight, Overheat Protection
Wattage: 4500 watts
Voltage: 240 Volts
Maximum Temperature: 131 Degrees Fahrenheit
Efficiency: 99.8%
Mount Type: Wall; Cabinet
Is Electric: Yes
Smart Home Compatibility: Not Smart Home Compatible
Color: 4500W,Black
Style Name: 4500W
Material Type: Acrylonitrile Butadiene Styrene
Item Dimensions W x H: 6.5"W x 8.66"H
Item Weight: 3.5 Pounds
Brand Name: APUS
Model Number: AP-ADSF-45M06
Manufacturer: APUS
Included Components: Tankless Water Heater x1; Manual Instruction x1; Assembly Kit x1; Installation card x1
Unit Count: 1.0 Count
Frequently asked questions
If you place your order now, the estimated arrival date for this product is:
Monday, Apr 27
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
Color: 4500W,Black
We use this for a totally different purpose than an under the sink instant on hot water heater, but an extremely useful purpose; a dog washer, yes. We have 2 large breed German Shepherds that tolerate bathing very well. This is a low volume electric water heater, so it works well for what our intentions are. For me, this was an easy installation, but I am a certified plumber and electrician. I did all of this work myself and it should be noted that I have a watertight cover for the receptacle connections. Running the 240 volt receptacle to get it near the water heater was the most tedious part of the project. Aside from that, the heater was simple to put together. I got creative with the inlet and outlet connections, which can be viewed in the photos included with this review. We set the temperature to 95 degrees, which is a comfortable temperature for dog bathing. The inlet is from our adjacent standard garden hose. The outlet (hot water) is coupled with a short garden hose and a siphoned soaper, which triggers hot the water. When we are done soaping and scrubbing the dogs, we simply remove the soaper device and then rinse them with the warm water from the heater. Also, using the included mounting bracket, which is very clever, we simply lift the heater from the bracket and take it indoors until the next bath. We are thrilled with this arrangement and it is so very convenient, compared to what we have been using for the last few decades. (yes, different dogs, of course!) Overall, this tankless water heater is a good quality device, under the sink, or otherwise.
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Reviewed in the United States on April 19, 2026 by Candle Fire
Color: 4500W,Black
If you are not familiar with Amazon Vine, it is basically Amazon trading free* products for honest reviews. I do my best to make my reviews honest, real and value-oriented as if I had paid for each item I receive. * These items are not totally free as Vine members pay income tax on the items they receive. I only mention this because we Viners do have some skin in the game for each item we order. Why I ordered this item: I needed hot water at my kitchen sink without waiting for it to travel from my main water heater across the house. My kitchen is at the opposite end from the water heater and it takes forever to get hot water there. Likes: * The size is crazy good for fitting under a sink. It's maybe 9 inches wide and super thin, so it doesn't take up much space in the cabinet. * Hot water comes out in maybe 5 seconds once I turn the faucet on. That's zippy compared to waiting a full minute before. * The LED display is snazzy and shows the exact temperature. You can adjust it with the touch buttons right on the front. * I figured out the wiring and got the bracket mounted. The connections lined up where they should. * The aluminum case feels thick and the heating element looks like it won't break. No likes: * The wire colors are wonky and don't match standard US electrical colors. I had to double-check everything with a multimeter before connecting it. * Water temperature drops a bit when you crank the flow rate all the way up. It's fine for normal use but don't expect blazing hot water if you're filling a big pot quickly. * You need an electrician unless you're comfortable with 240V wiring. This isn't something you just plug into a wall outlet. Would I pay full price for this product: Yes Final thoughts: The compact size and quick heating make it perfect for kitchens where you just need hot water right there.
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Reviewed in the United States on April 22, 2026 by ReviewersAnonymous
Color: 4500W,Black
I am currently building a massive wooden deck in my backyard. I ambitiously decided to install a fully functional outdoor sink and a giant hot tub. I quickly realized a terrible plumbing reality. I completely forgot to run a hot water line outside before I started building. I faced a deeply troubling decision. I could either aggressively tear down my finished living room walls, or I could wash my hands in freezing cold water forever. I ordered this APUS electric tankless water heater to entirely avoid a messy indoor demolition project. The heavy cardboard box arrived exactly when I needed it. I pulled the ultra-compact black device out and immediately admired the sleek design. The unit features a very bright LED digital display. It perfectly fits into tiny spaces; I plan to mount it directly under my new outdoor sink. I wanted to test the internal mechanics before I officially installed it. I casually hooked the water heater directly up to my dirty green garden hose. I temporarily wired the heavy 240V electrical connection and nervously turned the water on. The powerful 4500W heating elements instantly roared to life. The cold hose water became surprisingly hot in mere seconds. The instant on-demand hot water capability is genuinely impressive. I stood in my muddy grass and happily washed my hands in boiling luxury. The bright LED display accurately showed the rising temperature while my dog watched in complete confusion. This compact machine completely solves my terrible deck planning mistakes. I will never need to smash my interior drywall with a heavy hammer just to wash my hands outside. I can simply connect this powerful heater under my outdoor counter and enjoy endless hot water. You should absolutely buy this APUS tankless water heater if you need a reliable point-of-use solution. It smoothly delivers hot water exactly where you need it and successfully protects your house from unnecessary destruction.
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Reviewed in the United States on April 16, 2026 by Captainron042