> > Depends on the outside temperature. The colder outside (assuming heating
> > mode), the colder the main thermostat setting is required to keep the rest
> > of the house normal.
> Ok. So you also have a temperature sensor outside the house as well.
Yes. It is not required for the system operation (until the economizer is
implemented), but it's nice to just have it.
> But you manually control the interior thermostat correct?
> > > My only concern with doing this would be the static pressure I see you
> > > wrote about.
> > I'm not concerned about it at all - I know for sure that my ductwork
> > leaks as hell. If yours doesn't, though, you have two options - either
> > leave a part of the house not connected to the system with the dampers
> > fully open, or assemble and connect all the system, including the
> > controller, at once.
> Ok, so by connecting the system all at once including the controller would
> help because the system by design always leaves some % of zones open and
> then it would also have control of the system being on/off.
> This way once the zones are satisified the controller will then turn off
> the AC, and you wouldn't need to wait for the uncontrolled zone (where the
> thermostat is) to cool down further and then shut off.
Right now, yes.
> > > I know very little about AC systems, and the last I want to do is
> > > explain to the AC guy what I was doing, and how it broke my
> > > compressor/air handler.
> > Well, the HVAC guys are surprisingly uncooperative. I guess it goes like
> > "What we don't understand, we fear. What we fear, we destroy". The way
> > to go is to find a HVAC guy you can trust (and for me, that implies
> > knowing as much about HVAC as I can possibly learn, and then be able to
> > make sure that the guy knows his ropes), convince him (that's going to
> > be a no-brainer given condition 1 is satisfied, i.e. he knows his job)
> > and proceed.
> > Good starting point is just to start the data acquisition, then you will
> > know HOW bad it really is. One of the possible outcomes is that you say
> > "Man! this is SO bad I don't care if they trust me or not, I'm going to
> > do it anyway" :) That's what happened to me - sorry, but 14F difference
> > between different rooms with the AC working almost non-stop was not an
> > option.
> Yes. I think it would be interesting to see how different the room
> temperatures are.
> How difficult is it (if my zoning allows it) to fish the cable through the
> duct work. For me this would be my only option as I don't have attic or
Remember, you have to check whether your building codes allow to do this.
And, you better get the plenum rated cable - it's about twice as expensive
as regular PVC.
Me, I've just stapled the cables to the walls ;) Like the regular ethernet.
If you decide to fish the cables through the ductwork, be sure you've
fastened the cables, otherwise the airflow will make them rattle.