RHI Makes ASHP cheaper than Gas Boiler!

[djh]

...... The air in my loft in summer is colder than the air in the house, because it's shielded from the sun.

On the temperature in the loft djh's post referenced above, are you sure ?

Yes, I'm sure. When it gets seriously too hot in the house, I open the loft hatch which cools the house down for a while. But for reasons lightfoot has explained, the cooling effect is one shot and takes until the next day to recover.

There's nothing magic about our roof but it does face east and west, which may make it behave differently to ones that face north and south. perhaps?

[djh]

Surely AC on the trains will make the tunnels and stations even hotter

Well on modern underground systems, the trains are air-conditioned and so are the stations. And the tunnels are isolated from the platforms by glass walls like those on the Jubilee extension, except they go all the way to the roof. So nobody cares how hot they are.

[mespilus]

Surely AC on the trains will make the tunnels and stations even hotter

Well on modern underground systems, the trains are air-conditioned and so are the stations. And the tunnels are isolated from the platforms by glass walls like those on the Jubilee extension, except they go all the way to the roof. So nobody cares how hot they are.

Precisely.

Not even its best friends would call the Metropolitan Line a 'modern underground system'.
Don't think the (failed) PFI refurb allows for glazing the tunnel stations,
even if the platforms had enough space.