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Good point, I may well do the 2 smaller boiler option. Like you say, there will be back-up should one be out of action

Does anyone know of a good 80kW oil fired condensing boiler? I know Worcester Bosh do a 50-70kW, not sure if they do an 80kW version?

Is Low Smoke Zero Halogen (LSZH) single insulated cables to BS7211 a fire rated cable? Or is this considered as an insulated fire cable?

Thankyou for the info

Good stuff. This is all well and good, but what happens if joints are unavoidable or not practical?

Thanks, I was meaning wet underfloor heating. Regarding the joints, the 3m length copper pipes would need to be jointed, so there is no way round this I assume? Or I may be wrong here

What are the current Gas Safe regulations for installing copper gas pipework beneath the screed? Is there just a requirement to wrap in protective Denso tape. Are joints or connections an issue under the screeded floor? Are there different regulations if the screed also contains underfloor...

Could anyone please advise what the current IEE / Part P regs are when installing cabling beneath suspended timber floors i.e. in the floor of a bungalow. Should they be neatly clipped to the side of the joist. What happens if a joint is needed in the cabling, is the standard method of...

Hi, What (if any) are the advantages of foil backed pipe insulation as opposed to standard black pipe insulation.

Good point! Well I guess that is something put on a notice next to the boiler in big letters!

Thank you all for the comments. Presumably this set up / protection overrides any other settings which the user may set on the programmers and stats?

The boiler/system is on a weather compensator so it should activate when the outside temp drops below 3degC.... at what point does it fire the boiler?

Could someone explain how the 'anti-frost' mode works on Vaillant boilers? Does this activate the boiler / heating system if the temperature drops below X deg C? Thanks

Thanks, yes I think the nearest 3-phase network is half a mile away and the cost to bring it over the hills to the transformer was ten's of thousands! So I guess what you are saying is that we're stuck with the 240V single-phase unless we want to spend big money?!

The pole is only 50 metres away but I think the supply to it runs about a mile over the hills (and this could only be a single phase supply). Not entirely sure how it works, can you take a 1, 2 or 3 phase supply from a transformer full stop or does it depend on what type of supply is supplying...

The house is in the sticks somewhat and currently fed via a single-phase supply apparently the nearest three-phase is available half a mile away. There is a dedicated pole mounted transformer on the end of the overhead supply, are they able to take the second-phase from that?

How easy is it for the utility company to convert from a single-phase electricity supply to a 2-phase supply. What is involved? Apparently this may be more cost effective than a new 3-phase supply. It is a large house that may require more than a single-phase supply can cope with. However...

Thanks, so WHO sets the rules and regulations for taking the relevant precautions to keep the gas supply in place, if its not Corgi????

What are the CORGI regulations on this? I would like to know it can be done safely first

Thanks. I am not a RGI but I was curious as to what precautions were needed in order to allow it to remain in place.