Quote:
Originally Posted by mejunkhound
VFD simply could be commercial drivers, literally hundreds of different models.
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I checked out your VFD link, pretty good prices.
In your previous post, you recommended using 3-phase for the compressor, fan, and circulating pumps.
I can see that the VFDs as you pointed out would be appropriate for precisely controlling a compressor, but what about the kind of VFDs would you use to drive a fan? The smallest VFD I've come across are about 1HP.
Then there's the issue of VFD for circ pumps. Do 3-phase circ pumps exist in the size that would be selected for a typical home? I would guess that the typical not-so-well-insulated home would require a heating system of something like 3.5 Tons, and the circ pumps could run in the 100 watt range, and sometimes, in a well designed radiant system, even less... like maybe 60 watts... I do think you are on to something, in fact, I think it's the way of the future. But do 3-phase VFDs and fans and pump motors in home sizes exist?
-AC