I think he was saying that the cheaper ducts that go in the walls have a layer of insulation and plastic around them thats why they don't condensate.  

TOOLS REQUIRED-Post hole digger, long handled pointed shovel, baulk-line, measurement tape, power tool with plastic cutting blade, extension cords, concrete combination tub, 4' level.

So, be aware of that - once you put those signs out:1) People will take them - often other investors or neighbors that don't want plastic signs in their area, and2) Code enforcement could fine you.  

I have seen that a lot of our pet owners have gotten their pets certified as companion/service animals.  

My occupation is as a scientist in the plastics industry with 21 patents issued under my name; however, my business is real estate investing.

Per the mitigation firm, the mold is contained to the crawlspace, with no indication it is in the living space.Environmental Services said that he feels that the home is safe to stay in since the mold is 1) in the crawlspace, 2) there is a plastic tent over the access trapdoor, 3) the furnace is not located in the crawlspace, 4) the mitigation company has established negative air pressure in the crawlspace 5) as well as using anti microbial treatments and 6) water remediation efforts.I consulted with a real estate attorney.  

I never got so excited reading about plastic before!

It is free for landlords and it puts the burden on the tenant to prove it is a legitimate companion animal.

If it's from a doorknob, buy one of those self-stick plastic circles, These days you can youtube about any little repair for advice.

  I have enclosed it in plastic raceway from lowes or homedepo