Under sink unvented water heater
Under sink unvented water heater for sale on Ireland's largest auction and classifieds sites
Electric water heater under - 8l, - £64.52
Mini tank water • Heater trailer kitchen • Under sink counter - Free postage - New and Used
Mini tank water • Heater trailer kitchen • Under sink counter - Free postage - New and Used
Under sink tankless water - under, - £91.61
- Free postage - New and Used
- Free postage - New and Used
110v 120v 1440 1500w small - 110v-120v, - £177.92
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
110v 120v 1440 1500w - 110v-120v, 1440-1500w - £188.79
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
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Gallon electric tank - electric, - £239.99
Sink water heater • Power 1440w more • Travel from your - Free postage - New and Used
Sink water heater • Power 1440w more • Travel from your - Free postage - New and Used
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48 listings · from £22.95 · avg £230.65
⚠️ These listings were last updated more than 10 days ago.
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Browse 48 under sink unvented water heater listings currently in our index. Prices range from £22.95 to £900, with an average of £230.65. Whether you are hunting for a bargain or looking for a top-spec model, the selection below covers all price points — new, used and refurbished. More about under sink unvented water heater →
Gallon point of use - 6.5, - £249.99
Instant hot water • More waiting power • Where you need - Free postage - New and Used
Instant hot water • More waiting power • Where you need - Free postage - New and Used
Gallon water heater under - 4, - £190.67
Fill water before • First power use • Otherwise will cause - Free postage - New and Used
Fill water before • First power use • Otherwise will cause - Free postage - New and Used
4kw electric water - 4kw, - £59.17
Package included electric • Water heater remote • Control english manual - Free postage - New and Used
Package included electric • Water heater remote • Control english manual - Free postage - New and Used
110v 115v 120v - 110v/115v/120v, 1400-1500w - £143.44
Safe durable longevity • Made stainless steel • Never rust anti - Free postage - New and Used
Safe durable longevity • Made stainless steel • Never rust anti - Free postage - New and Used
110v 115v 120v - 110v/115v/120v, 1400-1500w - £138.88
Safe durable longevitymade • Stainless steel never • Rust anti leakage - Free postage - New and Used
Safe durable longevitymade • Stainless steel never • Rust anti leakage - Free postage - New and Used
5kw electric water heater - electric, - £73.95
Specifications color white • Shape rectangle material • 304 stainless steel - Free postage - New and Used
Specifications color white • Shape rectangle material • 304 stainless steel - Free postage - New and Used
Gallon vertical under sink - vertical, - £135.59
Rated power 1500w • You worry about • Not having enough - Free postage - New and Used
Rated power 1500w • You worry about • Not having enough - Free postage - New and Used
4kw electric water heater - water, - £58.58
Package included electric • Water heater remote • Control english manual - Free postage - New and Used
Package included electric • Water heater remote • Control english manual - Free postage - New and Used
110v 120v 1440 1500w - 110v-120v, 1440-1500w - £208.96
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
Quick heating 1500w under sink - 1500w, - £182.19
Under sink water • Rapid heating 1500w • Heater say goodbye - Free postage - New and Used
Under sink water • Rapid heating 1500w • Heater say goodbye - Free postage - New and Used
110v 120v 1440 1500w small - 110v-120v, - £269.99
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
Electric water heater 36kw - electric, 27/36kw - £730.39
Tankless water heater • Brings you unprecedented • Uses die cast - Free postage - New and Used
Tankless water heater • Brings you unprecedented • Uses die cast - Free postage - New and Used
Gallon water heater - gallon, - £185.59
Fill water before • First power use • Otherwise will cause - Free postage - New and Used
Fill water before • First power use • Otherwise will cause - Free postage - New and Used
110v 120v 1440 1500w small - 110v-120v, 1440-1500w - £156.71
110v 120v 1440 • 1500w under sink • Tank 2.5 gallon - Free postage - New and Used
110v 120v 1440 • 1500w under sink • Tank 2.5 gallon - Free postage - New and Used
4kw electric water - electric, heater - £59.17
Package included electric • Water heater remote • Control english manual - Free postage - New and Used
Package included electric • Water heater remote • Control english manual - Free postage - New and Used
Quick heating 1500w - quick, - £175.96
Under sink water • Rapid heating 1500w • Heater say goodbye - Free postage - New and Used
Under sink water • Rapid heating 1500w • Heater say goodbye - Free postage - New and Used
4kw electric water heater - water, - £59.17
Package included electric • Water heater remote • Control english manual - Free postage - New and Used
Package included electric • Water heater remote • Control english manual - Free postage - New and Used
Water heater - water, - £220.00
Instant flow model • Water heater wide • Variety uses pressure - Free postage - New and Used
Instant flow model • Water heater wide • Variety uses pressure - Free postage - New and Used
Under sink electric water - sink, - £181.49
Say goodbye lukewarm • Water hello new • Era convenience why - Free postage - New and Used
Say goodbye lukewarm • Water hello new • Era convenience why - Free postage - New and Used
3000w efficient tankless - 3000w, - £112.99
Water heater • 3000w efficient tankless • Mini instant hot - Free postage - New and Used
Water heater • 3000w efficient tankless • Mini instant hot - Free postage - New and Used
110v 120v 1440 - 1440-1500w, small - £164.30
Real compact design • Water heater cooridates • Scenes decor under - Free postage - New and Used
Real compact design • Water heater cooridates • Scenes decor under - Free postage - New and Used
110v 120v 1440 1500w small - 110v-120v, - £219.99
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
Rapid temperature recovery • Water heater made • From thick 304 - Free postage - New and Used
Compact adjustable water - adjustable, - £51.99
Specifications color white • Style modern shape • Rectangle material brass - Free postage - New and Used
Specifications color white • Style modern shape • Rectangle material brass - Free postage - New and Used
110v 120v 1440 1500w - 110v-120v, 1440-1500w - £119.61
Healthy water quality • Multiple safety protections • Over temperature protection - Free postage - New and Used
Healthy water quality • Multiple safety protections • Over temperature protection - Free postage - New and Used
Gallon tank water heater - tank, - £140.29
Tank water heater • Under sink instant • 1500w 120v kitchen - Free postage - New and Used
Tank water heater • Under sink instant • 1500w 120v kitchen - Free postage - New and Used
Gallon under sink water - gallon, - £258.18
Under sink water • Heater are you • Tired waiting hot - Free postage - New and Used
Under sink water • Heater are you • Tired waiting hot - Free postage - New and Used
127v 1350w water heater - 127v/1350w, - £22.95
Portable water heater • Includes heavy duty • Lightweight unit efficiently - Free postage - New and Used
Portable water heater • Includes heavy duty • Lightweight unit efficiently - Free postage - New and Used
Compact electric water heater - water, - £223.99
Electric water heater • 1.3 gallon under • Sink model say - Free postage - New and Used
Electric water heater • 1.3 gallon under • Sink model say - Free postage - New and Used
High efficiency under sink - under, - £220.40
Say goodbye waiting • Hello convenience 2.5 • Gallons instant heat - Free postage - New and Used
Say goodbye waiting • Hello convenience 2.5 • Gallons instant heat - Free postage - New and Used
Tankless electric water - electric, - £489.37
Hot water heater • Under sink demand • Bathroom kitchen office - Free postage - New and Used
Hot water heater • Under sink demand • Bathroom kitchen office - Free postage - New and Used
Tankless electric water - electric, - £515.56
Hot water heater • Under sink demand • Bathroom kitchen office - Free postage - New and Used
Hot water heater • Under sink demand • Bathroom kitchen office - Free postage - New and Used
Brand new water heater - water, - £900.00
- Free postage - New and Used
- Free postage - New and Used
5kw electric instant hot - 1.5kw, - £67.62
Specification rated voltage • 110v cetification fcc • Power 1500w maximum - Free postage - New and Used
Specification rated voltage • 110v cetification fcc • Power 1500w maximum - Free postage - New and Used
Gallon water heater under - 4, - £152.24
Water heater • Under sink instant • Heaters 1500w 110v - Free postage - New and Used
Water heater • Under sink instant • Heaters 1500w 110v - Free postage - New and Used
Tankless water heater electric - heater, - £225.39
Et060n2 6kw mini • Point use tankless • Electric water heater - Free postage - New and Used
Et060n2 6kw mini • Point use tankless • Electric water heater - Free postage - New and Used
Tankless electric water heater - water, - £507.93
Hot water heater • Under sink demand • Bathroom kitchen office - Free postage - New and Used
Hot water heater • Under sink demand • Bathroom kitchen office - Free postage - New and Used
Liter 1600w water - 70, - £302.99
1.18 gallon water • 70l storage capacity • This heater provides - Free postage - New and Used
1.18 gallon water • 70l storage capacity • This heater provides - Free postage - New and Used
Electric hot water heater - hot, - £123.38
Electric water heater • Four safety protections • Protection devices boil - Free postage - New and Used
Electric water heater • Four safety protections • Protection devices boil - Free postage - New and Used
Water heater for house - water, - £480.00
Water heater house • Heats automatically - Free postage - New and Used
Water heater house • Heats automatically - Free postage - New and Used
110v 1350w water - 1350w, heater - £24.95
Portable water heater • Includes heavy duty • Lightweight unit efficiently - Free postage - New and Used
Portable water heater • Includes heavy duty • Lightweight unit efficiently - Free postage - New and Used
Lightweight 5kw point use - point, of - £129.99
Nobody was ignored • Smaller than traditional • Tank heaters perfect - Free postage - New and Used
Nobody was ignored • Smaller than traditional • Tank heaters perfect - Free postage - New and Used
Gal medium 3800 watt - gal., 3800-watt - £795.38
Kilowatt 3.8 nominal • Tank capacity gallons • Gal rheem performance - Free postage - New and Used
Kilowatt 3.8 nominal • Tank capacity gallons • Gal rheem performance - Free postage - New and Used
Tankless electric water - electric, - £579.04
Vevor tankless electric • Water heater 36kw • Heaterunder sink demand - Free postage - New and Used
Vevor tankless electric • Water heater 36kw • Heaterunder sink demand - Free postage - New and Used
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Everything you need to know about under sink unvented water heater
Whether you are looking for a brand-new or second-hand under sink unvented water heater, eBay offers one of the largest selections available online. With 48 active listings at the time of this page's last update, you have plenty of choice across different conditions, sellers and price points. The cheapest option currently starts at £22.95, while premium listings can reach £900 — giving you a wide budget spread to work with. The average price of £230.65 can serve as a useful benchmark: listings below this tend to be used or auction-style, while those above often include extra accessories, warranties, or are sold by professional sellers with high feedback scores. Always check the seller's feedback rating and return policy before committing to a purchase. If you need the item quickly, filter by "Buy It Now" to avoid the uncertainty of auctions. For used items, look closely at the condition description and photos — terms like "good", "very good" and "like new" can mean very different things depending on the seller.