Portable 12V Air Conditioner --Cheap and easy!

Step 4 Attach Heater Core and Fans

The next step is to attach the fans. This is fairly straightforward--simply drill a small pilot hole at each corner of each fan, and put a small screw through the bottom hole into the plastic lid. Don't block the top hole if you want to add a fan guard later.

To attach the heater core, we used silicone caulk. A bead all the way around seals the lid and provides plenty of bonding force to hold the heater core in place. Make sure to get the core centered, straight, and with the nozzles pointing in. If your lid is hinged, you will want to do a test fit before attaching the core to ensure that the nozzles clear the edges. If your lid is not hinged, it may be easier to attach it first. We ended up cutting the output off to make it fit better.

Comments

[rlukenbill iii]

I bought two 120mm 12vdc fans but they were 2000rpm...they don't seem to be pushing enough air...should i invest in a bigger fan?

[Boardwack]

Do your fans have a third wire coming from them? And if so, did you ignore it when wiring everything together?

[mmmdieselfumes]

Third wire can be ignored. The yellow wire is a tachometer signal (rpm) wire. Only need the 12vdc (red) and gnd (black).

[asleif_rage]

nice, trying to make one in my hvac class, wish there were more details and pictures

[CameronSS]

What else do you need?

[Mrfixit123]

What is the CFM rating on those fans??