Computer Fan Heater





Introduction: Computer Fan Heater

In the winter time my house is cold.

In my house we have a gas fireplace, because we do not like running the heater and it saves money and the environment.

What i have noticed was the gas fireplace doesn't spread the heat around the room.

So i made a fan system out of a couple dead computer fans.

Step 1: What I Did

What i did.

I took a three computer fans and hooked them up to a 12v converter, then i set them up so they would

push the hot air out of our gas log fireplace saving us money, and reducing my carbon foot print.

Step 2: Materials

What you need!

3 or 2 computer fans ( i used 3)

1 12v converter

Wire stripper


Wire ties

extra wire

Step 3: The Fans

If your computer fan has three wires coming out then cut off the yellow wire and keep the red and black wires.

Then use a wire tie and connect and the wires together with the extra wire, then attach it to your 12v converter

Step 4: Seting Them Up

When you have them all wired up and working you can set them up in your fireplace

But first make sure you know which way the air blows out

Step 5: Thanks for the Support

Thank you for reading my instructable

After you are done with those fan guards you should check out bauble istructable on fan guard art

Please rate, comment, and vote for me for the dead computer contest.



  • Metal Contest 2017

    Metal Contest 2017
  • Wheels Contest 2017

    Wheels Contest 2017
  • Homemade Gifts Contest 2017

    Homemade Gifts Contest 2017

We have a be nice policy.
Please be positive and constructive.


Questions & Answers


I think they would work near the floor vent, put behind the vent, heat flows, use as booster to move the heat.

So, how does burning natural gas for a fireplace reduce your carbon footprint?

check out these heat shields I found from, made of a ceramic fiber a bic lighter will not singe!

What a great idea.  I stupidly put in a gas fireplace without a fan.  The cost to add one now is ridiculous!  I've been using a small fan in front of the fireplace and running my ceiling fans to pull the heat through the house.  I hope to try this, as well.  Thanks!!!

It's a good start, but you'd be much better off just blocking the chimney to keep heat in the room. Why that's not a good idea has already been discussed though.

The problem with those fires is the pretty-flames, if you modified it to heat some kind of mantle and have an exhaust to room heat exchanger, like ugly gas fires (pic), you might feel it a bit more.


Perhaps "unfashionable" would have been a better word then.


Yeah, but still retro-coolness

Yes, they might come back in, designed to be effective rather than pretty I think.