Fans on a rental counter split three ways, and the right one depends on whether you are cooling people, drying a floor or pushing air down a duct into a confined space. A carpet style air mover, a 30 or 36 inch drum fan and a ducted blower do genuinely different jobs, and the cheapest one rarely does the job you called about.
Three machines, three jobs
Air movers are low, angled and made to sweep a floor or a wall for drying. Drum fans stand at head height and move a large volume across a workshop or a marquee free open space. Ducted blowers push or pull air through flexible hose, which is what a tank, a vault or a crawl space needs.
Rates and how yards price the week
Small air movers commonly start near $25 a day and drum fans run to about $75, with weekly rates on both worth asking for because these units go out for the length of a dry down rather than an afternoon. Larger ducted blowers and evaporative units are quoted separately and often by the week only.
A fan cools people, not rooms
Moving air makes a person feel cooler by helping sweat evaporate; it does not lower the temperature of the space. In genuinely hot conditions that difference matters, because a fan blowing hot air over somebody who has stopped sweating helps nothing. Shade, water and rest breaks are the actual controls.
Where a fan makes the dust worse
Blowing air across cut concrete, dry sweepings or old insulation puts fine material into the breathing zone rather than removing it. Extraction through a filtered unit or a ducted blower drawing to outside is the answer there, and a plain drum fan pointed at a mess is the way a small problem becomes an inhaled one.
Questions people ask about large fan rental
How many air movers dry a room?
Restoration crews work on a fan per wall or per ten to sixteen feet of wall as a starting point, then adjust once meters show how the material is drying. Pair them with a dehumidifier: fans move moisture off surfaces, and something has to take it out of the air.
Is a drum fan enough for a hot workshop?
For comfort it helps a great deal, because you are increasing air movement over people. For actual cooling you need a spot cooler or portable air conditioning with somewhere for the hot exhaust to go, and those hire from the same counter at a different price.
What power does a large fan need?
Most air movers and drum fans run from an ordinary outlet, and several on one circuit is the usual mistake. Add the amp draw on the plates before plugging four into one breaker. Larger ducted blowers may want a dedicated supply, so ask the counter what the plug and draw are.