Could still be knob&tube.

They key is to run it and then completely air out the space after.

My husband served 8 years in the Air Force and has worked for them, as a civilian for 14 years.

I enjoy to be in the woods and feel this fresh air and the sounds of the woods and the mountains.

You sometimes have to deodorize and air out the space more than once.

And, your tenant's theory on why the door is damaged is pretty spot on:"If there isn't enough ventilation in your bathroom, the humidity in the air can wreak havoc on woodwork such as vanity doors. ...

From my understanding they are like a super air purifier.

I ran all new Pex lines & removed a lot of superfluous piping I then added air vents to eliminate air locks. 

My next stop is McGuire Air Force base, New Jersey.

There are several strategies to protect from untimely freeze events (air turbines, burning hay, taller trellising away from the colder ground-level air, etc), but the most cost efficient are taller trellises and choosing varieties that develop at the correct times to avoid freeze damage and take advantage of our hot weather to ripen.