My Kool o matic shroud got smashed to at least a dozen pieces by a falling limb, and the fan quit in August. So I ordered a Maxx fan replacement. It arrived today and I excitedly took it out to the coach and unpacked it. Took a look at the fan and the hole that is at a 45 degree angle and the OH SH** hit me like a bolt of lightning. This is never going to work. Anybody know of fan that inlet can be rotated 45 degrees?
How about any of these? maxx fan - Google Search (https://www.google.com/search?q=maxx+fan&oq=maxx+fan&aqs=chrome..69i57j0l5.3694j0j7&sourceid=chrome&ie=UTF-8)
Sorry about your damaged Kool o matic. I cannot picture what is at 45 degrees and how it affects your installation of Maxx fan.
I agree, should work no problem. I plan to change mine out this year.Even with the inside cover, the old school one is drafty.
All you have to do, is trim the inner trim ring on an angle to slide up to meet the vent inside once installed. The roof is not 45 degrees, maybe 10-15.
Due to how the kom was designed it did not matter how the interior grille or frame opening was oriented, it could be rotated fore and aft of the Centerline of the coach. My interior grille sets at a 45 degree angle to the fore aft centerline along with the aluminum roof frame. Not possible with the Maxx fan as the interior raising mechanism And controls would be 45 degrees out of sync along with the the exterior fan housing.
MaxxFan Deluxe Model 7000K (http://www.foreforums.com/index.php?topic=14795.msg87423#msg87423)
Is this the type fan you are talking about? This thread says it was an easy install. Must be very different on the older coaches.
Mark
Apparently I have the same floor plan, with the fan mounted to line up with the stove at a 45 degree angle to the center line of the coach. I have been dreading dealing with the same issue. Will a Maxx fan be okay with going down the road at 60-70 mph without having the hinge end being directly into the wind? I hope so, wouldn't that be like being stationary in a windstorm?
Definitely could not go down the road with the vent up, and it will look goofy from outside. Its low profile so the best I can do is put the low side next to the side of the coach. When it comes time to replace the headliner inside maybe I will redo the roof opening. Otherwise it appears to be well constructed with stainless parts, I have not hook it up to any power to see how noisy it is yet.
I do have the roof mount part I mentioned to yoy here still. Not sure of the 45 degree stuff as my 97 has the fan mounted square to the sidewall?
You put on of these over your new fan.
Amazon.com: Maxxair 503.15 (00-933066) White Vent Cover: Automotive (https://www.amazon.com/Maxxair-503-15-00-933066-White-Cover/dp/B000UUMM6K/ref=sr_1_4?ie=UTF8&qid=1519837859&sr=8-4&keywords=rv+roof+vent+cover)
I think I will mount it as a sidewinder for now, spring and storms are approaching, and the coach house is still 4-5 weeks out for the start plus some concrete cure time.
I installed fan today in 25-35 mph breeze and 65 degree temps. Install went well except my predrilled holes into the aluminum frame we're a tad small at 5/64 and I twisted off 2 of the soft stainless screws. Used stainless fender washers bedded in dicor 7/8 od is probably best but all I could get was 1". Even though the fan is cock eyed at 45 degrees from the centerline it is hardly noticed on the ground except the port side maxxfan decal gives you a hint that something is askew. Just got the manual raise 4 speed model as the rest seemed like overkill for kitchen exhaust. Speeds one and two are pretty quiet. Speeds 3 and 4 will suck in the curtains. Scraping the old sealants off of the old install and filling the 40 screw holes with self leveling dicor took about 2 hours. At this point I don't think I'll ever attempt to square up the fan as once lowered it is very sturdy and in the wind shadow of the front a/c.
Additional info I reported I drilled pilot holes with 5/64, but in fact I used 3/32 and frame flanges appear to be galvanized steel. Furnished exterior screws were stainless pan head sheet metal screws so if I were to do it over again I would run a hex head steel sheet metal screw down the pilot hole first to establish a thread. And then come back and run the soft stainless screws down. I am writing this because of the difficulties I had installing the interior trim ring.
The furnished interior painted screws are wood screws and the steel bottom flange seems to be thicker. Several unsuccessful attempts of even driving the hex head sheet metal screws into the pilot holes. Even when I got the sheet metal screws to penetrate the wood screws would not budge. Success at 9/64 pilot holes and screws pulled up tight and snug.
Phred post some pictures so we can grasp the 45 degree offset. For the life of me I cannot figure out how yours is mounted.....
I think Phred and I have similar floor plans. If you look at this picture at http://www.foreforums.com/index.php?action=media;sa=item;in=3852#viewitem you can see the installation means the Kool o matic is not installed perpendicular to the centerline. The top part of a Kool o matic can be rotated to align with the coach, conventional vents like the Fantastic Fan cannot.
Thank You fully understand now ^.^d
It's kinda funny (but probably not to Phred) how a engineering/design decision made almost 3 decades ago can come back to bite current owners in the butt. Back then, probably no thought was given to the "odd" mounting angle, cuz it worked just fine...
Lots of angled fan units out there, Could have been worse and I would recommend the Maxxfan deluxe as a suitable Kool O Matic replacement. Roof footprint is much smaller than the humongous KOM. Project went well and I still have 10 digits in spite of running my finger (for the third time) into the operating saw blade of the Fein Multimaster saw. No blood no foul. That saw may be expensive but still cheaper than an ER visit. Plus saw is super easy to use, high precission, and can cut where no other saws can get.