The cost of defrost

[DannyB (Danny Ballam)]

Thanks Sarah, that’s useful info.

Glyn’s post here has some helpful numbers:

Viessmann Defrost

It’s fascinating how Viessmann ASHPs handle defrost. In this analysis, I will compare the defrost characteristics of a Viessmann ASHP system with a similar Vaillant system. I’ve chosen to compare two high performing system on https://heatpumpmonitor.org: 16kW Viessmann 150A in Clunbury, Shropshire installed by Josh Stead: https://heatpumpmonitor.org/system/view?id=319 12kW Vaillant Arothem+ installed by Heat Geek in Ashstead, Surry https://heatpumpmonitor.org/system/view?id=196 Both sy…