Is air bleed valve required for downpipe radiators on ground floor if first floor has radiators?

[Samsg30]

Hi,
Plumber has setup a CH design like above and said the 4 radiators on the ground floor (R5,6,7,8) fed by the down pipes coming from the ceiling doesn't need the air bleed valve where I have marked with circles because air lock can bleed from the highest radiator on the first floor (R2) and other first floor radiators (R1,3,4)
I just wanted to check if that is the correct advise?
Boiler room is on the ground floor adjacent to the main house in the garage
Boi

 

[cross thread]

Every rad will have air bleeds ,that’s enough

 

[gas112]

Absolutely no need at all

 

[Harry Bloomfield]

Plumber has setup a CH design like above and said the 4 radiators on the ground floor (R5,6,7,8) fed by the down pipes coming from the ceiling doesn't need the air bleed valve where I have marked with circles because air lock can bleed from the highest radiator on the first floor (R2) and other first floor radiators (R1,3,4)
I just wanted to check if that is the correct advise?

Any air will rise to highest point in the system, which in this case is to R1 to R4, where it can be easily bled, so no need for additional valves.

 

[fixitflav]

You don't need bleed valves where you've ringed, as others said, the ones on the rads will do it.
I have a similar set-up, downstairs rads on drop pipes from the ceiling. If any of your downstairs rads use a top connection (most likely on the return) the air will go out automatically. But for what little effort it is to bleed them I'd do it anyway.

 

[Samsg30]

Thanks guys for your response. That's good to see no conflicting response so no confusion