GraHal Posted January 26, 2023 Share Posted January 26, 2023 What Regs impact installation of MVHR? Accepting that ducts would be boxed in behind plasterboard and / or above ceilings. I keep thinking of ceiling terminals / air valves ... they provide a pathway from one room to others. Do the air valves need to be self-closing or have intumescent seals etc? Also any other comments gratefully received. Thank You Link to comment Share on other sites More sharing options...
Conor Posted January 26, 2023 Share Posted January 26, 2023 (edited) None if your building is two floors or less. Good practice tho to seal any penetrations between floors etc. A lot of units will have a fire damper option, you'd need to connect whatever terminal there is for the function to your smoke alarms. Edited January 26, 2023 by Conor 1 Link to comment Share on other sites More sharing options...
MikeGrahamT21 Posted January 26, 2023 Share Posted January 26, 2023 I have 2 ducts which pass through a double wall (block cavity construction) from the loft into a vaulted ceiling, and these needed intumescent seals, as the wall is classed as a fire wall. 1 Link to comment Share on other sites More sharing options...
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