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Description
Mini 3.5-1 Point-of-Use Electric Tankless Water HeaterStiebel Eltron Mini compact tankless point of use models excel at supplying warm water at a constant temperature for hand washing at a sink. They are ideal for residential or commercial hand washing sink applications. The model must be carefully matched to the flow rate of the sink for proper operation. Mini tankless water heaters heat water instantaneously and endlessly at 99% efficiency as it flows through the unit. Unlike tank water heaters, they
Stiebel Eltron Mini compact tankless point-of-use models excel at supplying warm water at a constant temperature for hand washing at a sink. They are ideal for residential or commercial hand-washing sink applications. The model must be carefully matched to the flow rate of the sink for proper operation. Mini tankless water heaters heat water instantaneously and endlessly at 99% efficiency as it flows through the unit. Unlike tank water heaters, they save energy because they have no stand-by energy losses. The sleek, small design allows installation with the unit visible. Venting is unnecessary. Use the Sizing Guide and Technical Data Chart to determine the correct size for your application. Call Stiebel Eltron at 800.582.8423 with any questions. Meticulously engineered and carefully manufactured, Mini tankless water heaters are designed for years of trouble-free and energy-saving usage.- California residents
- Mini 3.5-1 is designed to provide warm water around 90° to 100° for hand washing at a standard flow (0.66 GPM) lavatory sink
- Mini 3.5-1 is shipped with a 0.66 GPM pressure compensating flow reducer/aerator that fits most faucets and should be installed
- Excels at supplying warm water at a constant temperature for hand washing at a sink but must be carefully matched to the flow rate of the sink to operate properly
- Requires hard-wired 120-Volt electric service, 1 dedicated 30 Amp breaker, 10-Gauge copper wiring, and has 3/8 in. compression plumbing connections
- Not designed for use at a kitchen sink or a shower, or as a booster heater for any application
- Because venting is not necessary, installation can be near the sink to save water and wait time for hot water
- Can be installed above or below the sink with water fittings pointing either up or down
- Uses standard flex connections for easy installation
- Made in Germany
- Professional installation recommended
Features
| Item Weight | 3.44 |
| Minimum Activation Rate (gpm) | .40 |
| Flow Rate @ 45 F Rise (gallons/min) | .53 gal (US)/min |
| Uniform Energy Factor | 0 |
| Flow Rate @ 55 F Rise (gallons/min) | .43 |
| Application Type | Point of Use |
| Pack Size | 1 |
| Finish Family | White |
| Returnable | 180-Day |
| Heat Exchanger Warranty | 2 Year |
| Commercial/Residential | Commercial,Residential |
| Required Volt Connection | 120 volt |
| Flow Rate @ 35 F Rise (gallons/min) | 0.68 gal (US)/min |
| Amperage (amps) | 29 |
| Fuel Type | Electric |
| Indoor/Outdoor | Indoor |
| Wattage (watts) | 3.5 |
| Maximum Temperature (F) | 122 |
| Minimum Temperature (F) | 86 |
| Product Weight (lb.) | 3.44 lb |
| Flow Rate @ 65 F Rise (gallons/min) | 0 |
| Water Heater Features | Wall Mounted |
| Wattage (watts)2 | 3.5 |
| Product Width (in.) | 20 in |
| Product Height (in.) | 48.375 in |
| Product Depth (in.) | 20.5 in |
| Water Connection Size (in.) | 3/4 |
| Certifications and Listings | CSA Listed,ETL Listed,UL Certified |
| Labor Warranty | No Warranty |
| Part Warranty | 3 Year |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Very pleased with my purchase
Color: Brown, Size: Mid Back
Easy to put together - instructions are good - excellent quality and the chair is comfortable. Far from being flimsy it's a heavy chair which rolls perfectly as needed. You won't find that many good chairs (if any!) at this excellent price. As always the ultimate question is: would I buy it again? The answer is YES, definitively. Great purchase.
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Reviewed in the United States on May 23, 2026
★★★★★ 5
superb, worth 2x the pricez
Color: Brown, Size: High Back
While this may appear to be an average run of the mill copycat sort of generic office chair, it's actually very comfortable with perfect lumbar support. Looks great, and the leather (or leather equivalent) feels durable. This sucker will last me in my WFH setup for years I do not doubt. Save yourself a few hundred bucks getting this versus some "premium" office chair... I doubt you'll notice much if any difference.
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Reviewed in the United States on May 5, 2026
★★★★★ 5
22 year old gamer approved.
Color: Black, Size: Mid Back
So far so good!! I bought this chair for my gamer son, he sat the springs out of his last one, so this one making it this long has me very pleased. It was easy to put together, and the quality is pretty notable, especially the wheels, super smooth rolling. It was definitely worth what we paid for it, and he finds it very comfortable, providing plenty of back support, and a stable seat for hours of gaming.
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Reviewed in the United States on May 10, 2026
★★★★★ 3
The back of the chair is not supportive
Color: Brown, Size: Mid Back
Really nice casters that truly roll quietly. The faux leather is stitched well and sturdy. The only problem i have is that the back is not adjustable and gives 0 back support. The whole back of the chair is hollow inside so your lumbar gets no help. The seat is comfy but super wide like a lot of other reviews mentioned
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Reviewed in the United States on February 22, 2026
★★★★★ 5
Stick with Name Brands
Color: Grey
Product arrived as described. I am 47, 5'9" and 195 lbs. I suffer from lower back pain. I am a graphic designer that spends hours in front of the computer. I purchased a less expensive chair, but it made my back feel like it was on fire and I was hobbling around the home like an elderly man. It wa sa gaming chair, with a cool look, but horribly uncomfortable—about $75 less than this chair.
I decided on Serta due to the brand recognition and quality of build. The chair arrived without blemish. It's very easy to assemble, taking me about 20 mins. I am very pleased with the look and quality of the leather. The seat cushion and back rest is quite comfortable. Firm, but soft, not too firm, but not too soft. I spend long hours at my desk and so far my back feels great. No burning, no hobbling. It's worth the extra $50-100 in cost. Happy customer.
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Reviewed in the United States on January 17, 2026