An ozone generator hires from a general rental counter for roughly $40 to $110 a day and $120 to $350 a week, and it is used for odor removal in a space nobody is in. Ozone is a respiratory irritant, so the machine treats a sealed, empty room on a timer and the room is ventilated before people, pets and plants come back.
What the machine is for
Smoke, mildew and lingering odors in a vacated apartment, a vehicle interior or a basement after water damage. Ozone oxidises the compounds that carry the smell rather than covering them. It does not dry anything and it does not replace cleaning, so the surfaces come first and the generator finishes the job.
Empty, sealed, timed, then aired
The usual sequence is to remove people and pets, close the space, run the machine on its timer from outside the room, then ventilate for several hours before reoccupying. Ozone is treated as a regulated air contaminant on worksites and the exposure limit applies to anyone who walks in early, which is why the timer is the safety device.
When an air scrubber is the right hire instead
If the room is occupied, or the problem is dust and particles rather than odor, the machine you want is a negative air scrubber with a filter, hired from the same counter at a similar rate. Scrubbers run continuously with people present. Ozone cannot, and no yard should hand one over saying otherwise.
Power and sizing
Most portable units draw modest current on an ordinary circuit, so power is rarely the constraint. Output is rated in grams per hour and matched to room volume: a car interior or a single bedroom needs a small unit, while a whole floor needs a larger one or several runs. The counter sizes it from your room dimensions.
Questions people ask about ozone machine rental
How long should an ozone machine run?
Commonly one to a few hours for a room, set on the built in timer, followed by several hours of ventilation. Longer is not better: once the odor compounds are oxidised the extra runtime only lengthens the airing out period before the space can be used again.
Is it safe to be in the house while it runs?
No. Treat the whole enclosed area as out of bounds for the run and the airing period, and take pets and houseplants out with you. If you need the space usable during treatment, hire a filtered air scrubber instead, which is designed to run around people.
Will ozone remove smoke smell permanently?
It removes a great deal of it, but only after the soot and residue have been cleaned off surfaces and soft furnishings have been dealt with. Where the source is still in the room, the smell returns within days and a second hire will not fix it.