Place houseplants where their light and watering needs can be met. Leave room for daily use of the space and do not treat a few pots as a ventilation system.
Put the plant where it can grow
Light, temperature and access for watering are practical reasons to choose a position. Look at the actual conditions around the leaves and pot, rather than using a room's name as a care instruction.
Leave space for daily life
Keep paths and doors clear and use a stable container. Allow for mature leaves, trailing stems and the weight of a watered pot. A plant should remain reachable for inspection and cleaning.
Deal with odors at the source
A few houseplants are not a substitute for ventilation or removing an odor source. Avoid promising that a particular pot will purify a bedroom or kitchen. If compost smells persistently unpleasant, inspect drainage and decaying material rather than masking it with fragrance.
Adjust one thing at a time
When a plant declines after moving, check the new light and drying rate. Gradual changes are easier to assess than moving, repotting, feeding and watering heavily all at once. Keep a simple record of what changed.
Related reading: Large Houseplants: Space, Light and Pot Choice.