Well, to be fair, you could turn off the gas central heating part. But still use the gas boiler for hot water only. A lot cheaper for just instant hot water when needed. Except for boiler maintenance/servicing.
Or
@Battiola73 could just stick to using their boiler
and central heating and enjoying hot baths whenever, a warm house, and not have to pay over the odds for this inefficient (and likely more expensive to run) item IW is flogging.
To be honest, I read the quip you're poking holes in as more of a wry observation than a statement.
Less about whether central heating can or can't be configured, and more about the fact Ideal World's presenters glibly gloss over the everyday practicalities of doing so, telling old folks watching, many worried about heating bills, to go and turn their central heating off and 'av a buy.
'Don't heat your whole house, heat the room you're in - that's what smart people do, and it saves you money, so get this while we've got it, loads of people are coming in now I've said that… web's gone berserk… I knew it…'
So yes, it is possible to have hot water with the central heating off.
If people are happy to do that, and want to buy the electric fan heater/ceramic radiator/oil/halogen lamp/whatever IW is selling as the panacea of all panaceas this week, have at it!
But I suspect most would do the obvious:
- Save money by not buying an electricity-sapping heater from IW
- Use your existing central heating system
- Adjust your thermostat/timer to suit
- Turn radiators off/down in the rooms you don't use
For the best money-saving heating tips, I hear Chef Mark is the man to ask… Water + electric grill = instant heat.