Portable air conditioning hires by the day, the week or the season: roughly $40 to $70 a day for a one ton spot cooler and $150 to $300 a day for a five ton machine, with weekly rates well below seven day rates. The size you need comes from the heat in the space, not its floor area, which is why a server room and a workshop of equal size take very different units.
Cooling is sold in tons, and a ton is a heat figure
One ton of cooling is twelve thousand BTU an hour. A room full of people and lighting needs perhaps a ton for every four hundred square feet; a room with a rack of equipment in it can need several times that in the same footprint. Count the heat sources, not the floor, before you ring a yard.
The plug is the first constraint to check
One ton units run on an ordinary 115 volt circuit and are genuinely portable. From about two tons upwards you are into 208 to 230 volt supplies with a specific plug, and above five tons often a hard connection. Tell the counter what outlet exists in the room. A machine that cannot be plugged in is a delivery charge wasted.
The heat has to leave the building
A portable air conditioner does not destroy heat, it moves it, so the condenser air needs a duct into a ceiling void, a window kit or an adjacent space that can carry it. Run the duct into the same room and the unit warms it. Water is the other output: a pump and a drain line, or somebody emptying a tank.
Book before the heatwave, not during it
Portable cooling is the most seasonal fleet on any yard, and in a hot week the region empties. Rates hold reasonably steady but availability does not, and a unit trucked in from three counties away arrives with a transport charge to match. If a summer shutdown or a server room is predictable, reserve the machine in spring.
Questions people ask about portable ac for rent
Will a portable ac cool a whole warehouse?
No, and no yard should sell it as one. Portable units are spot coolers: they hold a workstation, a control room or a machine down in a space that stays warm around them. Cooling a whole shed is a chiller and air handler package, or ducted units sized against the roof load.
Can I rent a portable ac for just a weekend?
Yes. Most counters write a day rate and a weekend rate, and small single phase units are collectable in a car or a van. The weekend rate is often barely more than a day, because the machine would sit on the shelf anyway.
Does a rented spot cooler need a window?
It needs somewhere for the hot condenser air to go, and a window is only one option. Yards supply ceiling duct kits for offices with a suspended ceiling and flexible duct for anything else. What matters is that the discharge is not in the room you are trying to cool.