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Help with installation / diagram

Former Community Member
Former Community Member
Hi,


I am after some help with a heated windows installation / diagram - grateful for any input.

Unfortunately, the company supplying the installion went bust and I have been left with a system that doesn't  work (incorrectly designed).

We had a local electrician do the first fix wiring based on the diagrams but he says what has been sent won't work in it's current state and he doesn't have the relevant expertise to adjust it.

We live in a rural area and electricians are not that common especially for something as complex as this.

Rather than post up the diagrams and go into too much detail initially, I just wanted to know if this is a place to ask for advice and if not could anyone point me in the right direction. e.g contact details for an electrical engineer.


Thanks.
Parents
  • 0
    Ian

    I don't think that these windows were ever intended to provide space heating, it would need an incredibly well insulated building to work at all. They sound like demister window ratings to me, so the sale was probably fraudulent. 750W of space heating from 3 panes in one room space is tiny, and how did you think that they gave proper heating? This much heat would take perhaps 10 minutes to just heat the air in a significant sized room through 20 degrees C, with no additional heat loss due to ventilation or construction mass at all. In an old building this would be impossible anyway, as you would need serious wall insulation everywhere to hold the overall loss to perhaps 500W total, that would need for a 50m2 total wall, floor and ceiling area, and including window losses, a value of 10W per sq m/20 degrees = 0.5W/m2/degree. This is serious insulation, and with some air change loss quite a problem to design. You could probably get this under ideal conditions with polyurethane board 100 mm thick, and no windows or doors at all! Note this is a fairly small room, and my numbers are somewhat estimated, but you get the picture. A warm window is like a warm radiator, it does not mean adequate heating.
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  • 0
    Ian

    I don't think that these windows were ever intended to provide space heating, it would need an incredibly well insulated building to work at all. They sound like demister window ratings to me, so the sale was probably fraudulent. 750W of space heating from 3 panes in one room space is tiny, and how did you think that they gave proper heating? This much heat would take perhaps 10 minutes to just heat the air in a significant sized room through 20 degrees C, with no additional heat loss due to ventilation or construction mass at all. In an old building this would be impossible anyway, as you would need serious wall insulation everywhere to hold the overall loss to perhaps 500W total, that would need for a 50m2 total wall, floor and ceiling area, and including window losses, a value of 10W per sq m/20 degrees = 0.5W/m2/degree. This is serious insulation, and with some air change loss quite a problem to design. You could probably get this under ideal conditions with polyurethane board 100 mm thick, and no windows or doors at all! Note this is a fairly small room, and my numbers are somewhat estimated, but you get the picture. A warm window is like a warm radiator, it does not mean adequate heating.
Children
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