What size tower fan do I need for a bedroom vs a living room?

For a standard bedroom, a 36-inch tower with around 25 ft/s airflow and a sub-30 dB low setting is what verified-purchase reviewers most often recommend. For larger living rooms, 42-inch models with 28 ft/s velocity, wider oscillation (90–120°) and longer throw (35–40 ft) are the consensus pick. Vornado-style 'whole-room circulator' towers are favored when you want air mixing rather than a directed breeze.