Over cooling a Norcold Refer
I have an 18 year old Norcld 682IM refer that did not come with cooling fans. It works fine at 85 degrees or less but struggles to maintain 40 degrees inside the refer on 90 plus days. After reading m...
Forum Discussion
Ivylog wrote:
For a moment I thought we had a Norcold that was actually cooling too good. Should've known better as that is 't possible. A 4 inch computer fan is all that you need and it does not have to be at the top.
Sheet metal worker (duct work / air handling guy) here. The fan should be mounted as close to the exhaust vent as possible. If near the bottom, it will serve to pressurize the plenum, more than exhaust it.
On a hot, still day, passive cooling falls short. You need forced air ventilation, to force/suck the hot air out of the plenum. Mounted lower, the fan will encounter way more resistance in the form of static pressure, and thus be less effective.
You could also install a fan at both the intake and exhaust vents, with a slightly stronger fan up top. This is how I plan to ventilate my battery compartment. Forced air in and out.
You can get very low draw 12v fans for a couple bucks each. 50-70cfm should suffice.
