I am now beginning my second winter at my present house, and I would very much appreciate some advice about a radiator - Gas Central Heating - and the attached pipe work that is in the Conservatory.
The pipe work in the Conservatory runs along an external wall in white plastic trunking to the rad. It doesn't have any lagging/foam surrounding it. The pipe work in the trunking - forward and return - could be too close to the wall, or too close together, meaning the lagging/foam won't go all the way round the pipe work?
In the Conservatory last year the temperature - I have a thermometer placed on the floor next to the pipe work that runs to the rad - at times dropped to -1/-2 degrees.
I normally have the CH on each day until mid-night, and concerning the conservatory valve this is on the 'Anti-Frost' setting. I would then programme the system to come on twice after mid-night, 30 minutes each time, when the forecast would be especially cold. The problem with this is that every time, without fail, the noise of the system running would wake me.
I would appreciate any advice on stopping any potential bursting of the pipes if I don't have the CH on after mid-night? I would like to have a restful night without the Central Heating needing to come on.
A major question I have is: as the temperature in the conservatory can drop to -1/-2 degrees would this be cold enough to burst the pipes considering the CH has been on until mid-night and that the valve on the conservatory rad has been set to Anti-frost?
With regard to taking other helpful measures what do people think of the following:
1) Shall I remove the white trunking and try to put lagging around the pipes?
2) Or would using Spiral Wrap be better?
3) Would it be helpful packing against the plastic trunking a roll of sealed insulation/fibre glass blanket? If this is a good idea and what thickness should I use?
4) Would it be helpful if I filled the trunking with expanding foam? I have an unused can in the garage.
At -1/-2 degrees is it fair to say there shouldn't be any possibility of the radiator bursting in the night, again considering the heating will be on until mid-night?
I would like to thank in advance all those who do respond.