Adding fan behind refrigerator...worthwhile??
I have 3 RVs and I seem to be addicted to adding stuff to them....lol. They each have a standard Dometic 2852 absorption refrigerator. They seem to be working as expected. I did replace the cooling...
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But if you don't completely cover the opening you're trying to pull air through, you're just going to pull air from around the sides of the fans, not up through the opening. That's why fans are shrouded. And, I agree you'll get some air through the fans if they're not running, it's not going to be very much as the fan blades will block any straight through air flow.
you keep getting fixated on a fan that is the same size as the opening. once again one small fan in a large space is not going to block any airflow. don't forget also that if you read the instalation instructions for most fridges the back of the condenser is suposed to have a baffel extending from the wall to within 1/2 to 1/4" of the baffel so you are restricting the flow right there. I have a factory fan in my fridge that is hooked to a thermostatic switch so it comes on when ever the temp gets above a specific value(don't ask me what it is haha.) they are not at the top, they are just above the baffel. the intent is to draw a smooth flow of aire accross the fins of the condenser. turbulant flow is less efficient at removing heat. mind you , there is a way to do it with the fan/fans at the bottom and that would be to build a wide linear nozzel that the fanse are sealed to that direct the air through the fins, but thats a lot of work. the easiest way is to remove the cover on your top vent and then reach down and mount it just above the baffel blowing up. before even adding a fan though make sure that baffel is in place. I have seen several units that were having fridge issues and when we looked the baffel was either mossing or installed to far away from the fins alowing air to bypass them instead of flowing throuhg them.
And you keep missing my point. 🙂 One small fan in a large space won't block any air flow, but it also won't increase air flow much, if any, because air will simply come in around the side of it. That's why fans are shrouded. The baffle doesn't restrict air flow so much as direct the air flow, which is why there are issues when the baffle is missing, or placed incorrectly. We'll just have to agree to disagree. 🙂
fj12ryder wrote:And you keep missing my point. 🙂 One small fan in a large space won't block any air flow, but it also won't increase air flow much, 🙂
haha ya, but I can tell you if I diable the one 3 or 4" fan that keystone installed inside the space for minethe temprature in the fridge will start to rise and not work very good, but I turn it on and it starts to cool right down again. playing with this I installed one in my camper to see what it would do and I can tell you one tiny fan in a large space dropped my tempratures in the fridge 8 degrees.
