Under Sink Instantaneous Water Heaters

Shop all Instant Water Heaters

All Under Sink Instantaneous Water Heaters

At Heater Shop, we supply constant and efficient domestic hot water heating with instantaneous water heaters. Instant water heater appliances are compact in design and offer output high enough to heat the water.

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Product reviews

4.7100% Positive (3 reviews)

Ratings based on data collected by third party reviewing platform.


Trusted Customer
23 March 2021 09:18

Stiebel Eltron DEM 6 Set Instantaneous Unvented Water Heater

Not connected it up yet - waiting for electrician to add 40 amp MBO to consumer unit

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Item delivered BEFORE expected date


Lee Ellingworth, Leicester
4 January 2021 09:08

Stiebel Eltron DEM 3 Set Instantaneous Unvented Water Heater

Best price you will find anywhere!

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Really good service, very polite and knowledgeable and extremely quick delivery!

Thank you very much for the really wonderful feedback.


Trusted Customer
6 November 2018 22:04

Stiebel Eltron DEM 3 Set Instantaneous Unvented Water Heater

Efficient and helpful. Product delivered on time.

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Efficient and helpfulet.

Thank you for your really great 5 star review.

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