3)The optional blower it sells for the NZ6000, apparently (per another poster's claims) does not have a variable speed control. I'd have to verify that with Napoleon, but if true, that also seems kind of cheapo for probably the most expensive unit on the market. Plus I would wonder about the noise since the blower, if turned on, would be on at high speed---no way to adjust to lower speed.
That claim about the blower seems odd, though they can be loud - our smoke dragon is noisy for sure. However even if it isn't variable out of the box, I'm sure you could hook up the appropriate type of control to make it so. (Just have to pick the right sort to match the motor type.)
I think you can do better than the NZ6000
Gooserider
I should inquire directly of Napoleon Tech support on the blower "variable speed" issue. I wouldn't want to be inaccurate on stating a negative abut them. I did reread their NZ6000 literature and they say nothing about variable speed, so perhaps it is true. The literature did say something about the "whisperquiet" fan I think, but in relation to "remote location". So maybe noise not an issue, but maybe it is.
Maybe Napoleon has made the blower one speed (if it is not variable) on purpose. Maybe this unit is so big, that when a blower should be on, it should be ON---at high speed. On the other hand, Napoleon says the blower is "optional". So lack of a variable control then just seems cheapo for the most expensive zc woodburning fireplace out there.
As to the combustion air ducts, Bis Tradition/Lennox Montecito Estate, and RSF Opel all have one 4" cold air intake duct. And the manuals all describe these ducts as insulated. In fact both RSF and Bis/Lennox install manuals describe in detail the cold air duct installs, with good detail pictures and instructions, and talk of "carefully peeling back the insulation layer at the stove end...", "wrapping the ends with duct tape", etc etc.
As to insulated or non-insulated ducts, I can't reason why anyone, anywhere -- even hot climes--would "have to" remove the (maybe) unneeded insulation. What harm could it do? If you need it--you need it. If you don't need it, its presence doesn't bother anything. So make insulated ducts the default--not uninsulated.
Speaking of Manuals, I was taken with the precise, complete, unambiguous, straightforward manner of both the Lennox and the RSF manuals. They answered questions other manuals didn't (Nap NZ 6000, and Travis FPX).
Points to Lennox and to RSF. 1) Insulated cold air intake ducts supplied standard,
2)straightforward, unambiguous manuals,
and 3) to Lennox/Bis, variable speed blower comes standard WITH the unit (not an extra cost option).
builderbob