If u run 1 cord at 25 w 4.5 m and space the turns between 20/30 mm it will reach temp.... Try in a spare bit of wood 1st as I ended having to double up my cords as I done 50 mm spaces with out testing and I had to router the slot bigger to accept both cords... Got probe pushed in a routered slot to middle of tile and now I get good temps.... It was still raising at 37 when I turned off in testing so I'll easily set it go 32/33 and should be all good in the cold months alsohow are you planning on raising the temp of the tile? Looks wicked though, off to bunnings for a router i think. Was it pretty straight forward to cut out the pattern for heat cord?
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