Re:Hitachi launches CO2 heat pump water heaters with solar-f...
by rsynnott on Friday September 11, 2026 @06:46AM
(#49656213)
> It’s very hard to beat that if you have a 98% efficient boiler
You do not, to be clear, have a 98% efficient gas boiler. You _may_ have a gas condenser boiler which claims 98% efficiency in absolutely ideal circumstances, but realistically you're likely not getting close to that. AIUI 80% efficiency is fairly normal for real-world condenser boiler usage (non-condensers were more like 70%)
You do not, to be clear, have a 98% efficient gas boiler. You _may_ have a gas condenser boiler which claims 98% efficiency in absolutely ideal circumstances, but realistically you're likely not getting close to that. AIUI 80% efficiency is fairly normal for real-world condenser boiler usage (non-condensers were more like 70%)