Does my floor plan make sense for electric UFH

[tobias1010]

I've got a relatively level concrete subfloor and here's the plan

Concrete subfloor
Primer
Grout
XPS Insulation board
Electric UFH
SLC
Tiles in kitchen/Laminate in Living area

I've just got a few questions:
Is 2 different flooring types over the same UFH OK? It's an open plan living room and so I'm planning to have a transition to tile at the kitchen.
Considering I need 2 mats of electric UFH anyway should I separate them in the 2 zones anyway?
Do I need some sort of DPM in there?
Is 150W enough or 200W? (Living area 17m2, Kitchen 6m2)

I've also considered
Concrete subfloor
Primer
SLC
Insulations boards
Electric UFH (foil under laminate), normal under tile (2 separate zones)
Laminate and tile
Would that be better?

Finally...Is electric UFH actually worth it cost and heating wise?

 

[foxhole]

Electric underfloor heating is negligible on room temp, more for comfort under foot. ( or wear slippers).
Are use using a mat for electric cable? What’s the ‘Grout’ for ?
Levelling compound needs to match that specified by manufacturer of heating.

 

[tobias1010]

Electric underfloor heating is negligible on room temp, more for comfort under foot. ( or wear slippers).
Are use using a mat for electric cable? What’s the ‘Grout’ for ?

Yes using a mat for electric cable, and the grout is to fix the XPS insulation boards down.

 

[foxhole]

Yes using a mat for electric cable, and the grout is to fix the XPS insulation boards down.

You don’t need the insulation the mat isolates the floor , the mat is glued down, grout is not a fixing material.

This type of thing?

 

[tobias1010]

I was thinking more in terms of those roll out mats actually

 

[flameport]

.Is electric UFH actually worth it cost and heating wise?

No.
Very expensive to run, and won't do much of a job at heating the room either.