frost protection insulation query

[pooch251081]

Hi all,

Am kind of re-posting this from the bottom of a previous post, I have a worcester greenstar 37CDi combi and I am looking into lagging the internal pipes now as well the external ones as we house it in a very cold outbuilding and I think the boiler is using up gas trying to protect itself from the cold (while we are out all day!) but what I was wondering is whether the internal tank is insulated enough so that it's not affected by the cold, will it be sufficient to just heavily lag the pipes or will the actual tank inside the boiler be subjected to these low temperatures causing it to fire up too?

 

[Hugh Jaleak]

I'd let the boiler carry on firing, whilst maybe using a few £'s worth of gas, its cheaper than taking a chance and the boiler freezing. Frost damage usually equals new boiler needed..... In the current cold snap its not a risk worth taking IMO. Any water carrying component inside is at risk and its not practical or possible to insulate the lot.

 

[Corgigrouch]

The boiler is protecting itself.. The water will rise to mildly warm... You can insulate all you like, eventually with no heat input it will freeze... So leave it be..

Only downside is the DHW pipework is not protected (Assuming combi)

Had a custard yesterday complaining that his frost stat was causing his boiler to run all the time and wanted to discuss a pipe 'stat to override the frost stat... I could see the logic of what he wanted but had no time to discuss it with a guy who I felt was fishing for free information

Either way the Worcester frost protection works on water temperature rather than air temperature...