I have a house that will sit unoccupied over winter and I wish to check it is protected without going as far as turning the heating on 24 7
My boiler has a frost protection mode that kicks in when it sees less than 5 degrees at the boiler. My radiators also have thermostats which have a low frost setting of 8 degrees. I guess part of my question is will this set up protect the remote parts of the house away from the boiler? If all the thermostats are set at 8 then they should get flow when ever the boiler kicks in as long as they have not frozen first. The boiler is against a single leaf external wall in a porch so it should be one of the colder places of the house.
The next part of the question is hot and cold taps, showers and toilets. If the frost protection is set at 5 degrees and the thermostats at 8 degrees then the house should not go much lower than 5 to 8 degrees? I was thinking of closing the open system and draining everything and chucking anti freeze in the toilet u bends but not sure if it is required if the heating system frost protection works as I think it should?
Ideas welcome. The house is a big enough disaster so don't need more issues!