Ventilation and air change: windows, extractors, MVHR
Removing vapour at the source is cheaper than dehumidifying the whole dwelling. That means showers, pans and drying racks.
MVHR is a different tier: it belongs in tight envelopes, not as the first buy for a studio with wet windows.
Guides
How to air a house in winter without wasting heat
Why a tilted window all day both cools and humidifies, and why three minutes fully open works better.
Mould in a windowless bathroom: extractor before dehumidifier
Why a portable unit in the lounge will not fix black silicone, and how to spec an extractor with a humidistat.
MVHR and humidity: when it belongs (and when it is another project)
What MVHR does to indoor vapour, what it does not do to rising damp and leaks, and why Qordac has no invented plant partners.