Does this have a built-in fuse?

No it does not have a built in fuse. This device is an electronic switch and should be treated as an ordinary manual on/off switch. Power to it from consumer unit should be protected by a 16amp MCB or fuse. An RCD will provide additional protection in case of immersion heater failure, a fuse between switch and immersion heater rated for immersion heater elements power will also provide extra protection for Electrisaver switch relay contacts

Anyone know if this can be used to replace a noisy economy 7 boost timer? Thanks

No it cant. Its manually operated. Only 1 button to select 15 min, 30 min and 1 hour then switches off!

Does it work with two element immersion heaters?

IT DEPENDS HOW YOUR 2 IMMERSION HEATER ARE CONFIGURED. THE LOWER ONE SHOULD BE ON THE NIGHT TIME CHEAP RATE AND THE UPPER ONE IS FOR THE DAY TIME BOOST. SO THIS IS THE ONE THAT THE E15 IS FITTED TOO. HOPE THIS HELPS.

Manufacturer	Horstmann
Part Number	E15
Product Dimensions	50 x 50 x 50 cm; 155 g
Item model number	E15
Colour	White
Material	plastic
Item Package Quantity	1
Switch Type	1 way
Switch style	Pushbutton Switch
Included Components	no_components
Batteries included?	No
Batteries Required?	No
Item Weight	155 g

Horstmann E15 Electrisaver Electronic Push Button Boost Timer Switch

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