13a Fuse Spare spur from ring circuit

[JaeJames]

Evening!
I've got a 32amp MCB under an 30mA RCD supplying a ring of sockets in the basement. There is an electric heater that the client wants hardwiring in (still needs to have a switch). My logic would be a Fused Switch. Can I take the spur from a near by double socket into the input?

 

[telectrix]

what's the rating of the heater (kW)?

 

[JaeJames]

If I knew I'd be too organised haha! All I know is its currently been powered by a 13amp plug. Hence I'm thinking a 13amp fused switch.

 

[davesparks]

It is not good practice to connect significant heating loads to a ring circuit, better to have a dedicated circuit.
But when altering an existing xistingnimstallation you have to make an informed cost/benefit assessment based on your knowledge and experience as well as an electrical assessment.