Extract & supply valve positions in vaulted rooms?

[Alan Ambrose]

Anyone have any thoughts / tips re extract & supply valve positions - particularly in a vaulted ceiling room?

 

Is there an advantage / disadvantage in having the valves high up in the ceiling?

[JohnMo]

I have mine in the wall and use coander nozzles to throw the air across the room. Used in 3 bedrooms, lounge and long hallway. Lounge two dots at extreme edge of the image by ceiling.

 

 

Air comes out following ceiling and drops about 7m later. All heated to room temperature, so you don't feel any air movement.

[Bramco]

In the bedrooms the supply valves are high on the walls. In the bathrooms, the extract valves are again high on the walls.

 

In the main kitchen/dining/living, they are on the vaulted ceiling. So 2 supply at the living end on one face of the ceiling. 2 extract at the kitchen end, one on each face.

[Kelvin]

I have a double plenum type in the vaulted living room 2.7m above floor height in the corner.  I measured the CO2 levels in the room and it’s fine and around the same level as all the other rooms. At the opposite end of that room there’s a double extract just behind the hob.