Rick, You went into a lot more detail. Good job. Your post was better at explaining what I had seen about the 20803 vs the 20703 and the fitment issues with the 20803. Both have fairly vertical sides for catching lines.
By "new" Nicro, I meant the 20703 as opposed to the old Nicro that's been gone for several years. This was the old one: http://www.marinemechanic.com/New-Folder2/solarvent.html The old Nicro fans never caught lines. Dennis C. On Mon, Apr 9, 2018 at 11:39 PM, Rick Brass via CnC-List < cnc-list@cnc-list.com> wrote: > Dennis, et al; > > > > Having installed both the Day/Night model N20703 (last fall) and N20803 > (just last week) on Imzadi, I have a couple of observations. > > > > I’ve replaced my dorade boxes with these fans. The Day/Night Plus N20703 > was a pretty simple installation. The main difficulty was enlarging the 3” > diameter hole in the deck to fit the larger diameter of the fan. The > mounting plate screws to the deck, and the fan itself screws to the > mounting plate. So it is a pretty robust installation. There is a trim > ring included for installation inside the headliner, but I just enlarged > the hole in the white Lexan panels that covered where my dorades came > through the ceiling. (BTW, you refer to the Day/Night Plus as the “new” > Nicro. They’ve actually been available for a couple of years snow.) > > > > The new N20803 fan is larger in diameter overall, stands higher off the > deck, and needs a significantly larger hole through the deck. Installation > was, consequentially, much more difficult. Installation is by a trim ring > that the fan screws into with an O-ring seal between the upper trim ring > and the fan (there are two neoprene seals between the fan and the deck), > and a lower trim ring that screws onto the output of the fan and is > supposed to snug up to the headliner. The minimum spacing of the two rings > is 3”, and the deck/headliner of my 38 above the head is only 2” thick, so > I had to modify both trim rings to get them to screw into place. > > > > The light on the N20803 is a nice feature, and the access to the battery > is easier if it needs replacing. And you can switch from intake to exhaust > by flipping a small switch on the light housing rather than changing the > fan blades. The assembly seems pretty robust. I suspect that you are > correct about sheets hanging up on the fan, but my fans are between the > “islands” on the cabin top for mounting winches and cleats, so that is > probably not a real problem for me… certainly they are a lot less likely to > capture sheets than the old dorade boxes and cowl vents. > > > > Unfortunately, the housing that holds the lights and switches seem to have > cut down on the amount of air being moved. My two fans are about 3 feet > apart, and the Day/Night Plus N20703 is moving noticeably more air. > > > > Also unfortunately, while the Day/Night Plus N20703 and 4 are in the > on-line Marineco listing of vent fans, they are no longer in the Marineco > catalog. And West Marine told me they are being replaced by the N20803 and > 4. > > > > In hindsight, I wish I had done a little more research and bought a second > Day/Night Plus fan from Amazon. > > > > Rick Brass > > Washington, NC > > > > > > >
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