In Burien, WA they allow Sch 35(green only), or Dual purpose sch 40 PVC(best). 

Hi Jeff,  I believe your going to need a line voltage thermostat.  

Dual-agency in WA actually means no representation, just facilitation.

CA is one of the states that allow dual agency.

Did you mean one dual zone mini-split system for a single 600 sq ft apartment?

I don't understand the dual use from an owners perspective.

Whereas you could get in out of each unit in a hour or two with a replacement (great time to survey/inspect the units, too, for a dual purpose trip).

In addition, he/she understands heat transfer, pressure gradients they relate to volume, capacity and air flow velocities, state transitions, voltage/amp/resistance as they relate to three-phase, series, paralleled systems, blah blah blah.

Use GeniusScan or CamScanner apps.3) We use Propertyware and used to mantain dual accounting entries in QB.

New dual pane windows cost X.I know it will vary from house to house, but I'm trying to get a rough estimate for what kind of cash I need to come up with for various items.Thank you so very much!