Questions You Should Know about Custom Blower Fan

Creating a Custom Blower-Type Fan

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However, there are a number of regular case fans that would fit nicely into the space, so it got me to thinking; could I convert one of these into a blower type fan?

I don't need the blower to be especially powerful, I just need it to give me a bit of extra airflow, so while regular case fans aren't designed to be blowers, I'm hoping they can still be made to modestly serve that purpose.

My thinking is that all I need to do is make sure the "back" of the fan (where it blows air out) is completely covered, and to remove one side of the fan's frame (the covered back should provide enough support for this if screwed on). After that, what else do I need? Will the front need any kind of cover as well, or should that be enough?

Any advice is welcome, also if anyone has any idea what kind of reduction in the fan's capabilities I should expect then I'd appreciate the estimate, as it'll help me to decide if this is going to make any difference or not (I don't want to cut up a fan if it won't help )

Okay, so I have an awkward space that really needs a blower fan that can pull air in horizontally and then push it vertically upwards. But most blowers that you can buy are either far too tall (I can only really fit 2cm thick or less), are too small (i.e - laptop type blowers that are only 60 or 80mm), or are far too noisy.However, there are a number of regular case fans that would fit nicely into the space, so it got me to thinking; could I convert one of these into a blower type fan?I don't need the blower to be especially powerful, I just need it to give me a bit of extra airflow, so while regular case fans aren't designed to be blowers, I'm hoping they can still be made to modestly serve that purpose.My thinking is that all I need to do is make sure the "back" of the fan (where it blows air out) is completely covered, and to remove one side of the fan's frame (the covered back should provide enough support for this if screwed on). After that, what else do I need? Will the front need any kind of cover as well, or should that be enough?Any advice is welcome, also if anyone has any idea what kind of reduction in the fan's capabilities I should expect then I'd appreciate the estimate, as it'll help me to decide if this is going to make any difference or not (I don't want to cut up a fan if it won't help

Respectfully submit there's a bunch of bad information floating around.

First, can't help you on initial q's- I honestly don't know. Heat transfer is based on a function called log mean temperature difference, basically, the greater the difference in temp, the more heat transfer. A high performance blower will move more air, and transfer more heat, than a low performance fan. The air may not be as hot, but there will be more of it. the air blowing on your feet will be a little cooler, but the ambient in cabin air will be warmer. And so will you

Imagine carying the initial assumption to it's conclusion- if I flow 1 cfm of air, it will be about the same temperature as the core, so that's a good thing, right?

A 120 cfm fan is lame. Current blowers are starting at 250-275 cfm in modern cars, and luxury cars move even more air. Booster fans are common in larger cars to get airflow to second seat passengers, and my wife's Volvo has outlets in the B pillars.

Best bet would be to get a blower motor from any domestic since the 70's, or imports post when they finally got the picture. Should come in about 250 cfm for something like a chevy cavalier fan, runs about 225 watt power consumption, about 18-20 amps (Run it through relays, so it gets the full 13+ volts, not 11.5 that cimes through the switch at these current levels. Also note this will suck your battery flat, so you need a bigger alternator.

Also note that you heating will vary with engine speed and load.

Look at modern cores with louvered fins and mltiple flow paths. They'll be tough to fit in the box, since the stock heater core is ummm.. 40's technology at best.

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