โAug-06-2018 03:30 PM
โNov-19-2018 02:50 AM
โNov-19-2018 02:17 AM
โNov-17-2018 12:48 PM
โAug-14-2018 04:43 PM
GordonThree wrote:
Yes, I can hear them from inside. Not concerned about the noise or power usage.
Rpm is not the lone determining factor for the performance of a fan. Wattage, static pressure and air mass movement are important variables to consider. Bearing type, motor design and price are also a consideration.
For all who feel that better 12v fans exist, please share the link. The fans I chose where not selected at random or by mistake, nor were they selected to be silent.
My fridge has no roof vent. It is a small unit and uses two side vents. The fans are installed in the upper exhaust vent and fit flush with the vent cover when it is installed. No additional baffling is required nor desired from the analysis and testing I have preformed.
โAug-14-2018 04:53 AM
GordonThree wrote:
A while back in another thread I mentioned buying two 3000 RPM 24 volt industrial fans for using to power vent my fridge on very hot days, to help improve efficiency.
I finally got around to installing them. I went with two Noctua iPPC 24v 3000RPM units, IP67 rated. They support pwm speed control but I'm currently not using that feature.
The fans are installed using silicone pegs? on a piece of aluminum angle stock. I re-used two mounting screws that hold the factory air damper in place.
The fans connect to a piece of 18ga cable which runs down to the bottom of the vent, where it's connected to a 12-24v boost converter and remote switch that is tapped into the fridge 12v supply.
I became overwhelmed by mosquito as I was installing the remote switch and didn't grab a picture. I'll try again shortly. The remote switch toggles on when ambient is above 85F and off at 82F, probably lower than it needs to be but 90-100 degree days are very rare in these parts.
โAug-14-2018 04:51 AM
โAug-13-2018 08:43 PM
โAug-09-2018 08:45 AM
โAug-09-2018 06:00 AM
โAug-07-2018 07:01 AM
โAug-07-2018 12:22 AM
GordonThree wrote:
A while back in another thread I mentioned buying two 3000 RPM 24 volt industrial fans for using to power vent my fridge on very hot days, to help improve efficiency.
I finally got around to installing them. I went with two Noctua iPPC 24v 3000RPM units, IP67 rated. They support pwm speed control but I'm currently not using that feature.
The fans are installed using silicone pegs? on a piece of aluminum angle stock. I re-used two mounting screws that hold the factory air damper in place.
The fans connect to a piece of 18ga cable which runs down to the bottom of the vent, where it's connected to a 12-24v boost converter and remote switch that is tapped into the fridge 12v supply.
I became overwhelmed by mosquito as I was installing the remote switch and didn't grab a picture. I'll try again shortly. The remote switch toggles on when ambient is above 85F and off at 82F, probably lower than it needs to be but 90-100 degree days are very rare in these parts.
โAug-06-2018 06:18 PM
midnightsadie wrote:
I.ve though about those auto fans, if I read it right they pull alot of amps.
โAug-06-2018 06:05 PM
stevemorris wrote:
im going to get a 12 volt automotive radiator fan, should be plenty for around here!(Ontario and eastern Canada)
our fridge is side vented bur not in a slideout, it has a small noisy fan somewhere in the "chimney" space, I can hear it
โAug-06-2018 05:37 PM