How efficient is the ZEB?

Installation within the heated envelope of the home rates a ZEB at 100% efficient at converting fuel into heat, as the ZEB converts 100% of its electricity consumption into heat (classified as 100% efficient for EPC purposes); installation in garages or unheated spaces is not optimal and may result in increased standing losses and reduced capacity.

To improve overall system performance, we advise our customers to use immersion heaters with a timer for hot water heating, rather than using the ZEB for water heating, particularly in the summer months.

It’s worth noting that when the ZEB is charging, it becomes a little bit warm itself – the surface temperature is cooler than a radiator but there are small heat losses, which will heat the area where the ZEB is located.