Ideas Library · Facade
Giving Vents, Meters and Flues One Place on the Elevation
Elevations are usually spoiled after they are designed, by the things nobody drew. This is the move that prevents it: a zone nominated in advance for every penetration, aligned with something on the elevation, and agreed with each trade before anything is cut.
Spaces:front elevationside elevationrear elevationmulti-storey facade
Style:disciplinedtidyconsidered
Where this idea works
Where this idea works
Contexts this direction tends to suit — and, honestly, where it may not.
- New builds and extensions where service positions are still open
- Elevations being refaced, where existing penetrations could be regrouped
- Symmetrical or otherwise disciplined elevations that a stray terminal would spoil
- Projects where several trades will cut through the same wall at different times
Where it may not fit
Where it may not fit
- Penetrations whose position is set by the appliance or by a requirement — those come first
- Existing walls where relocating services would be disproportionate to the gain
- Situations where grouping would place terminals too close together — a question for a qualified professional
Planning
Planning considerations
- Terminal positions are governed by clearances and by what each appliance needs, so the zone is agreed with a qualified professional rather than imposed on them
- The zone has to be agreed before first fix, because after that the holes exist
- Each penetration crosses the wall's water and air control layers, which makes it a technical matter and not only a visual one
- Meter positions are often decided by the supplier, so what is negotiable is worth establishing early
Layout
Layout considerations
- A vertical stack of terminals reads as intentional, while the same terminals scattered read as damage
- Aligning the zone with a window edge, a reveal line or a material change ties it into the composition
- Putting the zone on the least-seen elevation is legitimate, provided the clearances still work
- Recessing terminals or facing them in the wall material reduces how much they interrupt
Materials & finishes
Materials and finishes to discuss
Named generically as starting points to discuss with professionals — not specifications, and not priced.
Consider:extract and flue terminalsmasonry ventilators and airbricksmeter box enclosuresweathering collars and sealing componentsmatching or recessed grille faces
- Every penetration is a hole through the layers that keep the wall dry, and each has to stay sealed for the building's life
- Terminals discharge moist air onto the wall around them, which affects how that area weathers
- Grouping puts several penetrations in one area, so that area's detailing matters more than average
Maintenance & durability
Maintenance and durability questions
- Terminals and grilles need to be reachable for cleaning and for checking that they remain clear
- A grille that is meant to be open should never be sealed up during later work
- A record of what each penetration serves helps anyone working on the wall later
Professional review
What to ask a qualified professional
Bring these questions to a designer, contractor or the relevant qualified professional or authority.
- Which of these terminals have fixed clearance requirements that would govern their position?
- Could these penetrations be grouped into one zone without compromising how any of them work?
- How is each penetration sealed where it crosses the wall's control layers?
- Where would you place the zone so the terminals stay reachable for cleaning?
- What can the supplier's meter position be negotiated to, if anything?
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