3 ms·
> However this drops off as the outside temperature drops and you push up the heating demanded. With Irish climate and modern heat pumps this should be a non-i
by kevincox 4y ago
> However this drops off as the outside temperature drops and you push up the heating demanded.
With Irish climate and modern heat pumps this should be a non-issue. Maybe in the colder areas a day or two in the average year. Newer heat pumps can maintain very good efficiency under 0°C.
- tzs 4y ago> Newer heat pumps can maintain very good efficiency under 0°C Well under 0℃, in fact. The Mitsubishi ones are still at 200% at -18℃ (0℉), down from 300% at 0℃ (32℉). They don't fall to 100% until around -26℃ (-15℉). Fujitsu is similar. Their capacity also falls at lower temperatures going from 100% at -5℃ (23℉) to 76% at -25℃ (-13℉) so you might need to go with a bigger system in some areas.
- jillesvangurp 4y agoHeatpumps are commonly used all over scandinavia. They work fine even with extreme temperatures. Temperatures stay well above 0 Kelvin. So there's still plenty of energy to pump around. Of course with extreme temperatures you need to produce more heat. Which simply means you need a bigger setup.