Renting a portable air conditioner costs about $50 to $90 a day and $150 to $300 a week for a 1-ton unit, with monthly contracts bringing the daily cost down sharply. The important choices are capacity and power: a unit too small never catches up, and one too large for the outlet trips the circuit.
BTU, tons and what they cover
One ton is 12,000 BTU per hour. A single-ton portable will hold a small office, a server closet or a bedroom-sized space; two to five tons is the range for a shop floor, a marquee-free work area or a room full of equipment. Heat-producing machinery counts for far more than floor area does.
The exhaust has to leave the room
A portable unit does not remove heat from a space unless the hot condenser air is ducted out through a window kit, a ceiling plenum or a doorway panel. Running one with the hose coiled on the floor makes the room warmer, not cooler. Confirm which kit comes with the hire and whether the window opening suits it.
Power, plugs and circuits
Units up to about 1.5 tons run on standard 115 V outlets and draw enough that they want a dedicated circuit. Above that, expect 208/230 V and a plug type you need to check against the socket you have. Send the yard a photo of the receptacle if you are not certain what it is.
Where the price actually lands
Day hire is the dearest way to buy cooling, weekly is normally three to four times the day, and a month is well below four weeks. Delivery is charged each way unless you collect, and small units are wheeled and fit a van. Condensate handling, whether a tank or a pump, is worth asking about before it is on site.
Questions people ask about rent portable air conditioner
What size portable air conditioner do I need?
For an ordinary office or bedroom-sized room, a 1-ton unit at 12,000 BTU is the usual answer. Add capacity for equipment, direct sun and the number of people in the space, and size on the heat load rather than the floor area for anything technical.
Can I rent a portable AC without a window?
Yes, if there is somewhere else for the exhaust to go: a suspended ceiling plenum, a duct through a doorway panel, or a vent to an adjacent unoccupied space. What you cannot do is run it with no exhaust route at all.
Is it cheaper to rent for a month than a week?
Per day, clearly so. Monthly contracts typically cost well under four times the weekly figure, so if the hot spell or the plant repair looks like three weeks or more, book the month rather than renewing weekly.