Electric Underfloor Heating Installation

[The Ghost]

Try to map out exactly where the sensor is going in order to make sure a groove is made for the supplied ducting (12mm roughly) and consider putting in two sensors, one as a spare. They do go and its a failsafe back up. Manufacturers will say if it's 2 sq m. then get 1.5 sq. m. However measure very carefully, although you need to leave a space around the edges and obstacles you should attempt to get it as close to all edges as possible. If it's a hard shape you can get two smaller mats as the controller can control more than one mat.

 

[Midwest]

Try to map out exactly where the sensor is going in order to make sure a groove is made for the supplied ducting (12mm roughly) and consider putting in two sensors, one as a spare. They do go and its a failsafe back up. Manufacturers will say if it's 2 sq m. then get 1.5 sq. m. However measure very carefully, although you need to leave a space around the edges and obstacles you should attempt to get it as close to all edges as possible. If it's a hard shape you can get two smaller mats as the controller can control more than one mat.

Is that two in one ducting or two separate sensors & ducting ? Do all manufactures supply a ducting?

 

[The Ghost]

Don't know if all do but the three different manufacturers I've use do. There is enough ducting to put two in. I guess it's a case by case base for in one or two ducts.

 

[AJshep]

Apart from what's been mentioned I always take a photo of the mat once it's laid and do a sketch of the layout.

We had a builder install a heat mat recently, and they ended up putting the floor prob to close to the mat, so the stat kept cutting out as it thought it was up to temp.

They managed to speak to techinical and set the stat to work on air temp only, but we omitted it on our EIC because in Section 703 it says about the the floor temperature itself needing to be limited to 80°C, and the system should be able to limit the floor surface temperature in areas where people will walk.
When we phoned techinical they said this could be only achieved by using a floor probe.

So hopefully your customer gets the right stat, another thing is I believe different manufactors use different resistances for their floor probes.

 

[Midwest]

My customer is using 'thermonet' heat matt & their 'thermostouch'; thermostat Underfloor Heating - Thermogroup - http://www.thermogroupuk.com/products/underfloor-heating/. The manufacturer also do a matt specifically for shower trays to accommodate drainage, and are IP68 rated. Still not convinced on how the matt can be formed, to follow the contours of the drainage for walk-in showers (tiled), but guess its flexible. Need to speak with manufacturer & customer about that. Matts supplied with flexible conduit for sensor.

Instructions for testing before during installation etc.

Seems a piece of ---- (note the sarcasm smiley!)

 

[Sparkie30]

Installed this recently Schlüter®-DITRA-HEAT
german kit came with floor sensor and stat also you space the cable as wish. Test cable after laying it take picture of reading. Very good stuff.