LIV · 21.5 m2 · ventilated

Living room

the largest volume in the flat, and the hardest to fill evenly

Room conditions
Floor area	21.5 m2
Ceiling	2.72 m
Air exchange	ventilated one window, opened once or twice daily
Door cycles	1 / h
Working humidity	47 %
Temperature swing	4 C
Occupied	240 min / day
Household	one cat

Room marks are generated at build time from this room’s own record: the rungs it is worked at, its floor area and its air class.

Why this carrier here

At 21.5 m2 with a 2.72 m ceiling the living room holds roughly 58 m3 of air. A single carrier placed on a sideboard will fill the zone around it and nothing else; the far corner sofa will read as unscented. This is a coverage problem, not a strength problem, and the fix is distribution rather than more oil.

One window opened once or twice a day resets the room about every twelve hours. Carriers that release steadily across a full day handle that reset better than carriers that dump their load in the first six hours.

Where a cat shares the room, height matters more than format. Anything within 40 cm of the floor or of a seating surface collects fur and gets investigated; anything above 1.2 m is left alone.

Same room, other rung

Rung	Covers	One fill lasts	Rung matrix
L1	Barely there 1–5 m2	1-5 m2 of treated surface or enclosed volume; one sachet, one small plaque, two sprays on a cushion.	in preparation
L2	Close range 3–12 m2	3-12 m2; one 40-60 g wax tablet, one 60-90 g plaque, a four-reed diffuser, or three sprays on upholstery.	in preparation
L3	Half the room 10–26 m2	10-26 m2; a six- to eight-reed diffuser, two plaques at opposite ends, or a diffuser plus a stone.	Eight reeds, one downwind corner, 26 m2 of living room
L4	Whole room 18–30 m2	18 m2 and up, or any open-plan volume; two eight-reed diffusers, a diffuser plus two stones, or a diffuser plus a textile pass.	in preparation

1 live plan(s)

Eight reeds, one downwind corner, 26 m2 of living room (L3 · 45 d · CNY 38)