I now have six, all installed - and waiting for the electrician to connect up! Thanks to the Mayor of London's warmer homes scheme - for which I'm very grateful. I didn't think I'd qualify as being on a 'low income' with my pensions, but they deduct any rent or mortgage (which I don't have) and Council Tax, too. All free of charge - so I'm well pleased with my Christmas present. If in doubt - do apply!