We live in an older house built in about 1910 detached that has no cavity walls (hence we can't insulate) and each winter the house gets very cold despite the central heating being on. We changed the boiler to a good quality one but still used the older styled radiators without fins. Some are large doubles and some are singles but although they feel quite hot to touch the rooms do not warm up well. If we were to change the radiators to modern doubles radiators would we notice an appreciable difference?
Any help or suggestions welcome. Thanks.