Prepping for ASHP and sizing - Heat loss calcs confusion

[jack]

15 hours ago, SimonD said:

So in @jack's case, I can presume that the UFH works well to keep the upstairs warm in winter, but from the charts, shows it has no effect on upstairs for cooling and as he says 'unsurprisingly.' This demonstrates it isn't a whole house cooling strategy, even if it does provide comfort downstairs. Forgive me if I'm wrong @jack?

 

No, that's accurate.

 

Bedrooms are cool but acceptable (to me if not my wife!) in winter. This is the upstairs hall temperature in January and February (lowest is 17.4 °C, highest is 20.3 °C):

 

 

I'll be tweaking the control loop for next winter to see what sort of impact I can have on the lowest temps, as I now have more info available to let me analyse what's going on.

 

If I were doing this all again, I'd consider tiling upstairs with a wet UFH system. Rugs down in winter for underfoot warmth, along with intermittent mild heating to keep the temp relatively stable. Rugs up in summer, with cooling as needed.

[jack]

17 hours ago, JohnMo said:

... better than the cold draft and head ache it caused.

I get all sorts of headaches with dry air - same in winter when we have cold, dry periods. It's all sinus related.

[mistake_not]

Really useful thanks @jack.

 

I took a quick look at the Panasonic unit and on the face of it the specs look good and folks seem to have been able to integrate fully to HA using ESP32.

 

5 hours ago, jack said:

 

 

 

Annoyingly the image seems to have a problem and won't load 😞

[jack]

15 minutes ago, mistake_not said:

Annoyingly the image seems to have a problem and won't load 😞

 

That's odd. It's visible to me in both my post and where you quoted it in your reply. 

[marshian]

2 hours ago, jack said:

 

That's odd. It's visible to me in both my post and where you quoted it in your reply. 

 

Probably in your cache - I can't see it either

[jack]

3 hours ago, marshian said:

 

Probably in your cache - I can't see it either

 

Not visible on my phone, so I think you're right.

 

I'll post it again tomorrow when I'm back at my desk.