Originally Posted by cuyd
I am replacing old Armstrong on a 31'
I just want a cool only Penguin 13,500
What is the difference between ducted and non ducted units.
You need a non-ducted unit, since Airstreams do not have the required ceiling depth and headroom for a duct system that distributes the cool air thru out the trailer. I would also get a 15K unit for a 31', as you will appreciates the extra cooling capacity when it is either very hot or humid.
Next to consider are the cooling controls. You have 3 choices:
• direct mechanical controls: these are 2 rotary knobs located on the bottom of the air distribution box at the bottom of the A/C unit, one for fan speed and the other for degree of cooling. There are no precise temperature settings on this type
• single zone digital thermostat: a small box mounted on the wall that gives you a digital read out of the actual temperature that has been set and the actual room temperature. You can also control your furnace with this device. NOTE: this requires 12VDC wiring to be present at the A/C unit in the ceiling and 3 minimum 18AWG wires to run from the A/C to the thermostat location. You also must have the two blue wires from your furnace present at the A/C location if you wish to run the furnace.
• Comfort Control Center II (CCC II): a more complex digital thermostat system that has multi-zone capabilities. All of the extra wiring stated above must be present for it to work, plus there must be an RJ-45 phone-type data cable run between the A/C unit and the CCC II.
For ease of installation, most folks use option 1. If you are doing a re-model or have the existing wire in place, options 2 or 3 make for a better installation.