Small flats make appliance decisions harder because footprint, noise and access often matter more than the headline product category.
A dehumidifier route should start with tank access, placement, laundry habits and noise. An air purifier route should start with filter access, room layout and where the machine can sit without blocking daily use.
Humidifiers add cleaning and refill checks. Portable heaters add cable, placement and supervision checks. None of these pages replace professional advice or guarantee a health, mould, air-quality, humidity, safety or running-cost outcome.
Before buying, verify the current model, dimensions, filters or consumables, cleaning routine, delivery, returns and warranty wording on the merchant page.