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Tankless Electric Water Heater 3500W with Instant Hot Water
Tankless Electric Water Heater 3500W with Instant Hot Water
Tankless Electric Water Heater 3500W with Instant Hot Water
Tankless Electric Water Heater 3500W with Instant Hot Water

Fall Sale: 70% OFF on All products - limited time!

Tankless Electric Water Heater 3500W with Instant Hot Water

£266.95 £79.95 Save 70%
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Fast and free delivery across the UK
30-Day Money Back Guarantee
Only 4 left in stock — selling fast!
Ships Wed, 21. October Free Delivery

Hot water in seconds, without a bulky tank

Waiting for the water to warm up on a cold morning is no fun. This compact tankless heater fits on the wall or under the sink and heats water as it flows, so you get warm water almost straight away. It suits bathrooms, kitchens and offices where space is tight.

Why you'll love it

  • Instant heating: Warm water within seconds, no preheating
  • 3500W on demand: Only heats while water is flowing
  • Compact size: Just 19 × 15 × 7 cm and 1.2 kg
  • Built-in safety: Overheating protection and IPX4 splash resistance
  • Steady temperature: Automatic power control, 30–55°C range

Perfect for: Kitchen sinks, cloakroom basins, offices and garden rooms

We offer free shipping with no minimum order value. Every order can be tracked at any time using an individual tracking number.

We offer a 30-day right to return or exchange if for any reason you are not satisfied with your order.

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Your Heat Hollow Guarantee

30-Day Money-Back Guarantee

At Heat Hollow, everything revolves around staying warm without compromise. We believe the colder months should feel cosy, not something to simply get through. That is why we offer a carefully selected collection of heaters, heated blankets, warm wearables and mug warmers that are practical, reliable and made for everyday comfort.

Why choose Heat Hollow?

  • 30-day return policy
  • Free delivery on all orders
  • Secure payments
  • Caring customer support

What our customers say

★ ★ ★ ★ ★

Really pleased with this little heater. It fits perfectly in my bedroom and keeps the space feeling warm and cosy on chilly evenings. The compact design is lovely too.

Eleanor R. ✔ Verified
★ ★ ★ ★ ★

Such a handy little heater! I use it next to the sofa in the evenings, and it makes the room feel so much more comfortable. Looks great with my furniture too.

Joshua M. ✔ Verified
★ ★ ★ ★ ★

Very useful on cold mornings! It's compact, sits neatly on my dashboard, and helps keep me comfortable while the car warms up. Really happy with it so far.

Emma ✔ Verified
★ ★ ★ ★ ★

Bought this for my living room and I'm really happy with it. It's small, looks lovely, and gives off a nice warmth when I'm relaxing on the sofa. Just what I needed!

Scarlett E. ✔ Verified
★ ★ ★ ★ ★

Absolutely love this mug warmer! I always forget about my coffee while working, but now it stays warm for much longer. Looks really nice on my desk as well.

Dominic M. ✔ Verified

Frequently asked questions

We offer free delivery on all orders.

Yes, you can return the items within 30 days after the delivery date.

If you want to cancel your order, please contact us as soon as possible at support@heathollow.com. Please note that we cannot guarantee cancellation if your order has already been processed.

If your parcel is delayed or lost, please contact us. Our team will help you resolve the issue as quickly as possible.

Visit the page specially designed for tracking orders, where you can track your order. You can find it here.

We accept the following payment methods: PayPal, Apple Pay, Mastercard, Maestro, Visa, Visa Electron, and American Express (AMEX). All payments are securely encrypted and processed via SSL.

You can reach us via email at support@heathollow.com. We usually respond within 24 hours.

Fast & Free Delivery

Enjoy complimentary & fast delivery on every order, no minimum spend, no surprises.

30-day return policy

If you are not completely satisfied with your purchase, you have 30 days to return or exchange the item — just reach out to our team.

Secure payments

We offer secure payments through trusted payment providers, ensuring that your personal data is protected.

Our Business Information

Store Name: Heat Hollow
Business Name: Heat Hollow LTD
Address: Great Charlotte Street, Liverpool L1 1QR, United Kingdom

Email: support@heathollow.com
Phone: +44 151 709 4560

Customer Service: Monday–Friday, 09:00–17:00
Saturday, Sunday & Public Holidays: Closed
Response Time: Up to one business day.

Our Policy

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Instant Electric Water Heater 3500W – Tankless Under Sink