I can will make allowances to retro- fit TRVs in each room if the room on the upper floor loops only If heating is uneven. But I intend to have the heating on in all rooms constantly from November to April



Q.1. Do I need to put in any Automatic Airbleed Valves on the upper storeyloops, (If so where should the AAV be positioned -Just before the return pipe goes vertically down to the manifold to catch the air?)Or does the UFH water have enough pressure force the bubbles down to the ground floor manifold AAVs.
http://www.enine-pv.com/EN_web/valve/safetyvalve.html

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