UFH how long till turn on?

[RickyLee53]

Hello,

I have just tiled my downstairs toilet with electric UFH cable/mat.

The tiles are travetine, laid with flexible rapid setting adhesive ontop of 10mm tile backer board, which is in turn laid the same way on the concrete subfloor. (concrete is years old)

I'm yet to seal or grout the floor.

I have read a week, then turn up the heat a couple of degree's per day. Is this needed? I'm eager to test it as I have a 45sq m kitchen diner to do using the same method if it works ok.

Regards
Ricky

 

[thompsonbrown]

turning on to soon could make the adhesive crack. following manufacture guidence is safest option. theres no reason it won't work if you checked resistance in mat cables when fitting. the only thing you won't know is time it takes to get warm. also doing a 45sq m kitchen i would consider a 100w per sq m kit due to the running cost of such a large area.

 

[RickyLee53]

Hello,

Sorry I worded it wrong. I'm more interested in, how long the floor takes to warm with just 10mm insulation and how effective it is at heating the room. The adhesive didn't actually say anything about it. It just said suitable for UFH, on the heating box it said 7 days. But wasn't sure if this was just when using SLC.

Thanks for the advice on the 100w mat. Although I thought it mainly altered the warmup time and not so much the overall power consumption. That is the part that concerns me most with so little insulation.

Thanks.

 

[Ajax123]

In he absence of any more accurate and product specific info leave it 28 days then bring the temp up slowly.

 

[thompsonbrown]

you have good insulation so the tiles after being commissioned properly should heat up within 30 mins. if you use a slc before tiling this will help to spread the heat better, in my opinion makes tiling easier as well. it also helps when you use a thermal primer before laying mat.

 

[Uheat - Keith]

100w/m2 system against 160m/w2 system.
If installed on insulation boards use the 160w/m2 system.
If you set at 22 deg C, the 100w/m2 system will stay on longer to get to the 22 deg C, if a 160w/m2 system, time taken will be shorter, approx same power used.

Running Costs - The calculation of running costs at best can only be approximate. The actual cost will depend on a number of considerations and are determined by many different factors.

• User preferences
• Temperature and switch on time set points
• Insulation values of the properties
• Cost of energy

1000 watt of any heating system = 1 unit of electric.. Most systems run between 1/3 and 2/3 of time added into a programmable controller, depending upon factors as above and the following:
· Temperature you set room at.
· Temperature you set floor sensor.
· Times you set into the programmable thermostat.
· Doors & Windows left open or closed (Warm air goes to coldest areas first)

Hope that is of some help, warm regards, Keith