However; the heat of the fire wouldn't be the biggest issue, but smoke.

The only thing I know that will work (and I've seen flippers do it on houses with smoke/pet smells) is an ozone generator.You can rent them.

I'm assuming you are saying that you are having a home inspection. you really don't need to ask questions, if the home inspector is good, he will pick up on things that are wrong. the main thing you want to make sure is in place is safety items ( handrails, smoke/ fire detectors, carbon monoxide detectors, fire extinguisher meant for grease fires in the kitchen). the only thing you may want to ask is, how old the mechanical units are, so you are not waiting for the report, this way you know if you will need them soon or not.

An example is the smoke detectors. 

The only downside is he smokes cigs but assured me he wouldn't smoke in the house.

In reality I would treat it as if you were to treat cigarette smoke residue.  

In addition, you'll likely need to add hard wired / communicating smoke alarms once you redo a certain percentage of the electrical.

Smoke/CO detectors too.

Note that being in Colorado, none of our rentals have A/C :)January: Change furnace filters (we do it- we have learned that tenants will not, it is just easier to do it ourselves)Test Smoke detectorsSpring:Yearly sewer rooting serviceSummer:Check on landscaping if anything needs us to attend toTest Smoke detectorsOctober:Change filters in furnaceHVAC cleanout

Originally posted by Tim Silvers: Please clarify this.