That means, you can charge rent to a tenant who breached their contract, until you get rent coming in from a new tenant.  

For example, in California, a smoke detector must be inside every sleeping area and must operate on a 10 year battery.

Im not familiar with Oregon law, so obviously follow your state law, but many places allow you to charge rent until a new tenant can be placed if they break a lease early. 

Our government already does tell us how much rent we can charge, rent control, 2017 we are allowed a 1.5% increase.

Again, the ones I was referred to seem to be for large complexes, or charge really high fees.

And we said we were doing a maintenance check and would be checking smoke detector batteries.  

We did inspections every 6 months (26 unit building), and would check smoke detector batteries as well as look for leaks or running toilets.And if the water bill went up significantly, we'd do additional inspections, looking for the inevitable running toilet.Next best option is to use month to month agreements, so if you suspect a unit is going crazy with the utilities, you can get rid of that tenant.  

Hi Everyone,I’ve got a few unrelated questions I was hoping to have answered: 1) It’s my understanding that it’s the tenant’s responsibility to change HVAC filters and carbon monoxide detector batteries every 6 months.

However you're often not required to also pay for other housing, you just can't charge rent while they can't live there.

What you should be fearing is the reality of what could happen:Say you forget to check the smoke detectors, or forget to put them up in all the bedrooms, or years go by and the battery dies-- huge fire breaks out, destroys you place (if you don't have insurance, it would be a total loss!)