Seamlessly integrating your hot water cylinder into your Smart Radiator System, achieve a sophisticated and wireless solution for controlling your home's hot water zone.

By communicating via RF frequency with the RF16 controller, this device is ideal both for new builds and for retrofitting existing installations, ensuring flexibility and ease of use. Ensuring reliable temperature control, it is essential to pair the eTRV-HW with the SEMTRV22B valve for optimal performance. Engineered for ease and efficiency, the eTRV-HW comes equipped with a convenient boost function that allows you to extend heating for 30 minutes, or up to 3 hours, whenever you need an extra burst of warmth. It operates within a range of 30 metres and is powered by included AA Li-FeS2 batteries, promising extended operational life. For peace of mind, it is lockable to safeguard settings and features a precise temperature sensor to accurately adjust to your preferred warmth from 5° to 90°. With a robust 5-year manufacturer warranty, it embodies reliability and cutting-edge heating control in a sleek design.

Product Details:

  • Smart cylinder thermostat
  • Boost function: 30 min, 1, 2, or 3 hour boost
  • For use with RF16 controller and GW04
  • Lockable design
  • RF range up to 30m
  • Temperature sensor: NTC10K
  • Temperature range: 5-90°C
  • Includes 2 x AA Li-FeS2 batteries

£4.99 Standard Delivery, or FREE on most orders over £99* (some exclusions apply)

£9.99 Next day delivery is available for orders places before 12 noon. Any orders placed for next day delivery after this time, will take 2 working days to be delivered.

Working/delivery days are Monday to Friday, deliveries will not normally be made Saturday or Sunday.

We offer a 30-day returns policy on on the majority of our items*, as long as the item is unused, undamaged and unopened**. We only ask that the postage is covered by yourself. 


* Please see our delivery page for further details on specific exceptions.

** Some products that are made to order or personalised cannot be returned.

***Exclusions apply for items shipped directly from our suppliers, and some big & bulky items may incur an additional charge. Please see our delivery page for full details. 

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EPH Controls Smart Cylinder Thermostat eTRV-HW

  • 72,53 €
  • (Delivery from 5,57 € )
Item in Stock   |   Usually dispatched within 24 hours
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Spot Products:
  • Hot Water 22mm Isolation Valve Straight for ETRV-HW
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Free UK Delivery on most orders over £99
Delivery Rates & Information

Delivery Options

Standard Delivery: £4.99 - Free for all orders over £99.*
Next Day Delivery: £9.99 - Available for orders placed before 12:00 PM (Noon).

Important Delivery Notes

Next Day Delivery Cut-off: Orders placed after 12:00 PM (Noon) using Next Day Delivery will be delivered within two working days.
Working Days: Our standard delivery and shipping days are Monday through Friday. We do not normally deliver on Saturdays or Sundays.

Easy 30-Day Returns

We want you to be happy with your purchase! We offer a 30-day returns policy on all items, provided the following conditions are met:
  • The item is unused and undamaged.
  • The item is returned in its original packaging.
  • The customer is responsible for the return postage costs.

Combining Your Order

We always strive to combine your order into a single delivery. However, your order may arrive in multiple shipments if it contains:
  • Items from different warehouses (Standard items).
  • 'Direct' items (These are shipped separately and directly from the supplier) and will arrive separately from other items in your order.

*Exclusions & Additional Charges

The following items may be excluded from standard shipping rates or may incur extra delivery charges:
  • Items Shipped Directly from Suppliers ('Direct' items).
  • Certain Large or Bulky Items.
Want it by Monday 12th October? Order within 14 hours, 40 minutes