Air Source Heat Pump Swap

[shm]

Does that long pipe run to the external evaporator make this a hybrid air source / ground source system :) !

[malcolm]

How old is it and why does it need to be changed?

[yngndrw.]

This reminds me of the Vaillant flexoTHERM with the aroCOLLECT module.

[PaulLunn-czmr]

How did you get the vaillant cap? Do you have a link :)

[stephenayers]

Using the antifreeze valve, did you need to use any glycol or just use water?

[johnburns]

A large garden. Dig a trench and make it a ground source heat pump, raising the efficiency greatly. A no-brainer.