Earlier quoted context omitted.
I said I'm not convinced, it obviously isn't a general thing. A friend of mine spends 500+ euros per month on gas for heating since he works from home, no way on earth his office uses 500 per person and per month on heat
A 2kW electric heater can heat up any reasonable size office room up to a temperature where you are going to have to strip to your underwear (or turn it off) in under an hour in my experience. Even if it's on 8 hours a day constantly, 5 days a week, 4 weeks a month that's 320kWh or just over £100 a month at UK energy prices.
not sure if that makes your anecdote out of date or if it puts further shade on the parents comment.