Darryl Engle's Remote Ducted A/C
uses remote ducting for his A/C installation. He made a cowling for
the A/C unit out of left-over aluminum, and attached it to the face.
He originally had separate ducts for supply and return air, but found that
the unit would ice up because there was not enough air flow over the
coils. In the photo above, the square hole in front is for the
intake (it could have been larger), and the two ducts are for the cold air
photo shows the location and type of the interior ducts. The elbows
and flex ducting are found with the dryer vent stuff at Home Depot.
There is no need to try to find insulated 4" ducting. However,
you should wrap insulation around these two elbows to prevent condensation
The photo on the left is the cabin registers, obtained from an RV
supply store. The right photo is the A/C control panel Darryl installed in
the cabin wall. The wire is run inside the duct.
This is a close-up of the cowling. It actually only
needs to cover the top cold-air vent. It appears Darryl took out the
control panel, connected extension wires and quick-disconnect couplings,
and re-mounted the thermostat inside the cabin. If this seems a
little beyond your technical abilities, you could either try to find an
A/C unit that comes with a remote control control, or just exit the
teardrop to control the unit.
The benefits of this option are:
- The A/C unit is not taking up space when not needed.
- The A/C unit is outside, reducing noise and the possibility of
condensate water leaks.
- It is easy to have the unit intake fresh warm air in order to keep
icing to a minimum.
Some considerations with this installation are:
- A vent the same size as the A/C vents should be installed to the
outdoors to avoid pressurizing the cabin, or the windows left
partially open (but this adds to the noise). Typically, a couple
vents the same size as the A/C vents are installed into the galley,
and then a couple more vents installed in the galley side walls to the
outside. Round louvered aluminum soffit vents are popular for
this. Venting like this will also condition the galley, saving your
ice a little longer.
- Remember that if you're using a generator to power this
installation, keep the generator well away from your A/C intake so the
exhaust fumes won't be sucked into the A/C and blown into the
cabin. This could kill you.
Teardrop A/C options page
Back to Teardrop Trailer Plans page