Adding Fans to Norcold refers
Bought a '02 Winnie Journey back in February and it came with a 2 door Norcold Model N842IM. The rig only had 70K on it so nearly everything looks brand new and has had very little use. It appeared th...
Forum Discussion
SCVJeff wrote:
I just added 4ea. Noctura NF-12 fans to the upper exhaust vent. After doing way more research than I ever thought could be done on fans, these were chosen because they are EXTREMELY quiet for their CFM airflow, they're IP65 environmentally rated and can live in temps of 250 degrees plus. All 4 at full speed can barely be heard with your ear in the outside vent, and not at all inside, all while easily holding a piece of paper flush to the vent from suction. I run them on a PWM speed control at about 30% and when in LaQuinta a few weeks ago ran them on full at 95+ with the sun on the fridge side and was struggling to keep is above 28 degrees on temp set 4. The plan is to tie the PWM controller and fans to an ARP and let it run the show as needed.
If I did it again I would probably use only two fans but overkill is always good with these fridges.
Very nice job, Jeff. I've added the fans to my Amazon wish list. Great of you to do the engineering on the fans for me already! I think I'd just use a home designed PWM with a switch selectable speed control setup out in the vent along with a thermodisk or two for overall control. First TD closes, the fans come on at 30%. 2nd TD closes, goes to 95%.
As was mentioned, extra fans probably aren't necessary for this 2-door model on a fixed wall, but, I like doing projects, and this one looks to be fun.
Thanks for all the advice everyone. I'm up in the cool NW ATM and will probably tackle this project in late June or so. Or even later, depends on weather.
