Airflow?

[meridianflyer]

Ok, stupid question, finishing up my keezer build and getting ready to install the fan. Which way do I want the airflow? I think it needs to blow towards the lid, right?

 

[BeerBaron1985]

Ok, stupid question, finishing up my keezer build and getting ready to install the fan. Which way do I want the airflow? I think it needs to blow towards the lid, right?

Yes, think convection currents. Cold air sinks, hot air rises. I have mine blowing from bottom to top.

 

[kh54s10]

I would think that if you got enough air movement it wouldn't matter. Guess side to side wouldn't be good...

 

[day_trippr]

It may depend on the keg configuration but I have a 120mm 12vdc fan running at 9vdc perched upon the keezer hump firing along the long dimension between two rows of three kegs. This is an example plot from my temperature monitor showing there's not much temperature difference between the top and bottom of the interior space...

Cheers!

 

[BeerBaron1985]

I got the bilge fan with some 3" pvc pipe. Operates on a speed controller. Fan draws air upward. Probe is wrapped around a can of soda. Temp stays very concistant. 37-40 degrees Fahrenheit.

 

[meridianflyer]

It may depend on the keg configuration but I have a 120mm 12vdc fan running at 9vdc perched upon the keezer hump firing along the long dimension between two rows of three kegs. This is an example plot from my temperature monitor showing there's not much temperature difference between the top and bottom of the interior space...

View attachment 643846

Cheers!

I like the chart! Looks like your tower air is quite a bit warmer. Does this pose any foaming issues?

 

[meridianflyer]

That is one kick ass set up! Were did you get your lights?

 

[meridianflyer]

Looks like a guy could go a couple of different ways. I already purchased the fan, so I will go ahead and mount on the inside of my collar and move air from bottom to top!

 

[day_trippr]

The tower generally stays within 11°F of the cabinet temperature this time of the summer and within 5°F the other 9-10 months of the year. The faucets literally drip condensation so the cooler is definitely doing something useful
On these warm days if I pour a couple of ounces then count to 10 I can fill the glass the rest of the way without excessive head so it's eminently livable. Without the tower cooler I'd likely be dumping a few ounces instead...

Cheers!

 

[BeerBaron1985]

LEDs, PSU, wires, all on Amazon.

55mm cooling fans keep the insulated tower same temp as my kegerator box.

 

[matt_m]

My current 3-1/4 keg keezer has a collar made 1x8 PVC material and the inside is insulated with a few layers of the foil bubble insulation, so its pretty well insulated. I just have a 3" fan mounted near the top blowing down. Never had condensation issues. My only mistake that I still haven't fixed is that I just have the probe in the air.

Building a new 4 keg keezer very soon with two towers like BeerBaron1985's smaller unit and I'm planning to cool the towers in a similar manner. Figure the air blowing out of the bottom of the towers will be enough circulation but if not I'll add another fan.

It probably helps that all of this is in my dry basement with a fairly constant cooler temps and a dehumidifier that keeps the space pretty consistently low humidity.

 

[LittleRiver]

I have my fan on the bottom, below the shank area, blowing upward.

I used long machine screws in the four corners of the fan to create legs that hold it about 1" off the bottom of the freezer. I put some vinyl tubing over the ends of the screws to make non-marring "feet".

 

[BeerBaron1985]

I picked up the two fan cold tower yeara ago. Its basically a plastic enclosure box with two birdcage style fans running off 12VDC. The hose has a plastic fitting that secures it to the box. Took a bit of elbow grease to force the hose into the tower, but once done it works well. The small area were there is no insulation the tower sweats, the rest of it doesnt, and best of all no foamy pours. I have 11.5ft 3/16ID lines at 14psi. All about line balancing. Most beers are carbed at 2.55 volumes of CO2 with the exception of some porters/stouts.