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Tronic mini-tank es4 4-Gallons Lowboy 6-year Limited Warranty 1440-Watt 1 Element Point Of Use Electric Water Heater

Ratings & Reviews for Bosch Tronic mini-tank es4 4-Gallons Lowboy 6-year Limited Warranty 1440-Watt 1 Element Point Of Use Electric Water Heater

4.3
180
Review
 4.3 out of 5
180 Reviews


75% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

The product provides instant hot water and is generally well-received for its compact size. However, some users have reported issues with the pressure relief valve leaking and the need for frequent maintenance. The small 4-gallon capacity may also not be sufficient for all users' needs. Overall, the product is considered a good quality option, but customers should be aware of the maintenance requirements and potential capacity limitations.

Customer review summary generated by AI, including incentivized reviews.
180 Customer Reviews

Would Recommend

Capacity is 3.7 gallons, but it does not seem to generate that much hot water before it is no Longer hot.

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Broken

Would Recommend

package arrived broken.

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Response from Bosch Thermotechnology

Carlos, We at Bosch are sorry to hear that the Lowe's contracted carrier delivered your Lowe's purchased Bosch item in an unacceptable condi... Read More

Bosch ThermotechnologySeptember 21, 2026

Great Water Heater

Excellent for under kitchen sink for fast hot water when your on demand is on the opposite end of the house.

September 13, 2026
Verified Purchaser
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Instant hot water

Would Recommend

It is nice to have instant hot water from the Bosch mini tank at the kitchen sink, rather than waiting for the hot water to arrive from the outdoor tankless water heater.

September 4, 2026
Verified Purchaser
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Leaked less than 2 years

Would Not Recommend

This caused severe damage to my hardwood floor

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Response from Bosch Thermotechnology

We are sorry to hear about your concerns of the Bosch model ES2.5. Bosch warrants that the Water Heater Inner Tank (“Inner Tank”) shall remain free... Read More

Bosch ThermotechnologyAugust 26, 2026

Leaks from bottom split line

Would Not Recommend

After 7 years of use my Bosch 2.5 gallon water heater started leaking from the bottom split line. I ordered an identical model from Lowe’s and installed it. After 5 weeks of use the new unit began leaking from the same location. I verified none of the water line connections were not leaking and it was indeed leaking out the bottom split line. Bosch refused to replace it under the 3 year warranty because it wasn’t installed by a certified plumber. I’m not going to pay a plumber $400 to install a ...

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use soft water and filter it

Would Recommend

size

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Needs parts list

Would Recommend

Found there was a missing part, plug for alternate mounting position when the unit was filled and water flowed from the side outlet for the pressure release valve. No lististing of parts in manual and this was first time it wasn't in the box. Had two other purchases.

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Response from Bosch Thermotechnology

OkcDancer, The “Use and Care Manual” on this product detail page links to the parts list for this product. Please call customer support at 1-800-283-... Read More

Bosch ThermotechnologyJune 10, 2026

Bosch

Would Recommend

I recommend the Bosch heater to everyone. Instant hot water to sink. Install under the sink. No more waiting for hot water.

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Would buy again

Would Recommend

Easy install plugs right in and gets hot water to the sink quick

May 21, 2026
Verified Purchaser
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Nice little unit

Would Recommend

I liked the size of this product and it appeared to get good reviews

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bad product

Would Not Recommend

It won't turn on. I asked for a refund, but Lowe's refused because 30 days had passed and told me to contact Bosch. This is so frustrating.

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Response from Bosch Thermotechnology

Douglas, We apologize for the problems you have experienced. You may wish to contact our Technical Support at 800-283-3787 Monday – Thursday, 8AM ... Read More

Bosch ThermotechnologyMay 4, 2026

Compact and works amazing

Compact

April 30, 2026
Verified Purchaser
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Water Heater

Would Recommend

I always urchase the Bosch ware heater, has water temperature control and has never failed me yet

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