Heat pumps won’t work in old homes, warns Bosch

[George]

4 hours ago, Roger440 said:

 

Better than oil in what way?

For oil vs ashp generally... Cheaper because of solar pv, no big tank in the garden, no arranging for deliveries, no risk of fuel theft. 

 

For my old system specifically, no fumes and was horribly inefficient. Obviously a more modern system would be more efficient and not be fumey either... 

[Dillsue]

19 hours ago, Iceverge said:

 

Yes you're right. If you add grid losses at about 7-8% into it where do we end up? 

AFAIK grid losses happen primarily through transformers and a bit from cabling over distance. House 1s PV is generated at 230vac at a ready to use voltage so no transformer losses. The PV will also likely supply nearby neighbours so minimal cable losses. For anything gas generated theres always transformer losses and unless you live next to a power station therell be some cable losses.

 

Exactly how that impacts on your house 1 and 2 comparison I dont know as theres a multitude of variables!

[SteamyTea]

3 minutes ago, Dillsue said:

AFAIK grid losses happen primarily through transformers and a bit from cabling over distance. House 1s PV is generated at 230vac at a ready to use voltage so no transformer losses.

Yes, that is right.