New smoke alarms going off

[Yulia Garvanovic]

Could please someone recommend what I should do if my tenant's smoke alarms frequently (once in 1-2 months) go off for no apparent reason?

I rent out one half of the duplex I own and live in the other. A few months ago, I replaced all the smoke-detectors in the unit. They all have new batteries.

Can dust in the air trigger them off? The tenant has one dog and 4 cats, and there is quite a bit of dust and fur.