mjr wrote: ↑25 Nov 2022, 11:08am
Not keep cool, but warm up less quickly than if you open it. If you doubt that, try explaining how cool bags work for summer picnics, or why Spanish soldiers wore six layer uniforms in Florida.
The food in a cool bag absorbs heat from the outside air at a higher temperature, wrap it in insulation and it will warm up slower. The human body
emits heat, at all times, summer and winter, wrap it in too much insulation and it will overheat.
al_yrpal wrote: ↑25 Nov 2022, 11:14amIts a 5 year old Worcester Bosch condensing boiler running at full bore which is when this type of boiler is most efficient.
I fitted a new WB boiler in 2017.
Previously I had a 12kW boiler for heating, and 22kW multipoint for hot water, which I replaced with a combi. As the 22kW multipoint was a bit short of heat in winter I opted for a 28kW combi rather than the 25kW, even though the 12kW boiler was plenty for the heating. My actual average gas consumption during February 2022 was 2.9kW, which possibly goes a long way to explaining why it's barely any more efficient than the old one.