I live in a 2 bedroom flat and have 4 radiator running. Living room, one bedroom, hallway and bathroom. Its my first time in a flat where there is gas heating and i am scared that it will cost a lot to run.
At first i was turning it on for 2 hours in evening every now and then. Now as its been windy and cold. Indoors, the temperature drops to 12.5 -13 degrees sometime and therefore I have started putting it on for two hours in the morning when we wake up and 2-3 hours in the evening.
Our flat is a shitty old apartment with hardly any insulation and single glazed windows which let a large amount of draft in. I have taped it all up and tried to fix it as much as possible and tried to fill as many gaps I could to stop air coming in. Landlord has definitely done a cowboy job and saved his bucks by not replacing old windows or filling walls or floors with insulation.
I do feel that as soon as I turn heating off it takes an hour or two for it two go back down to 14-13 or even 12.5 in evening if its 1 degree outside for example.
We have an old 2000-2005 vaillant plus combi boiler, no thermostat fitted (even if there was a thermostat i believe as it is a cold flat it would come on more often than normal) old ass radiators that have not been changed by the looks of it since 1990’s or 1980’s. I keep my boiler on 60degrees when i turn heating on.