Thanks, I'm going to run that by my plumber. Is the newer composite material you are referring to on the gas company side of my house? I could call my gas distributor, Vectren, for an answer if so.
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Do you have wall, floor or baseboard type supply registers?
I suppose. You always hope to find a professional that will do the right thing without needing direction. It has never been true in my experience from medical, to legal, to the trades without a large amount of homework on my part first.
Here for example, without a significant amount of research, I would never have found the right furnace for me. It had to be special ordered, and no sales guy suggested it.
Likewise with my model of tankless. While this company has had a number of installs of the base model, the only one with the buffer tank they installed was by mistake and had to have the buffer tank disabled by homeowner request. I would have been very unhappy with the base model as it turns out, so it was only knowing what I wanted that saved me.
In fact, i'd bet the homeowner that got the better model was only unhappy because he was probably not oriented to the benefits properly by the company. Which goes along with my experience that the installer, while doing an OK job of physically installing the Navien, did not really know it.
Likewise with my duct revision. No one suggested that either, but when pointed out, all agreed it was a good idea.
Not trying to slam HVAC companies in general, but an informed and sophisticated homeowner does usually end up with with a better install. I think that is what happened to me, and I also had the benefit of a better than average company that was, as you say, responsive to my needs.
I'm a bit disappointed with the new return drop, more now that I have read the feedback, but I don't think it is a huge deal. I am unfortunately the kind of guy who tends to focus on the negatives. Just the way I view the world - and I like to think that it improves my own professional practice of continual improvement.
Looks like you generally have what you wanted.
After I install something I'LL sometimes look at it and think, gee if I had only install the pipe a 1/2 inch to the left.
That would require disassembly of the drop? Perhaps a better design installed would do just as well.
Just out of curiosity, when you said that it would be possible to have static improvements of .1, does that include at low stage? Drop the static from .21 to .11? Or only at a max airflow of 800 CFM while running the AC?
I've been noticing some interesting effects of the induction blower that I don't understand. With the main blower remaining at 0 CFM (off), there is actually hot air delivered through my supplies during warm up. It is pretty low flow, a trickle only, far less than when the blower turns on. Perhaps it is convection only. But if so, that would seem like the heat exchanger is getting too hot before the blower turns on.
I haven't timed it, but it is a pretty good wait watching the read out before the blower kicks on - I'd guess two full minutes.
Natural convection. Happens with all furnaces to one extent or another.
Vanes are easier to install then a whole new ell.