Custom Air Conditioning Retrofit

[Rockhead]

True as this chart goes with 2 windows 1 door and 8 ft ceilings It does fine for the trailer'. my point in posting shows that the 9500 is almost overkill for a 21. It all comes to a users preference. True calculation's take into account wall thickness,amount of insulation and a couple of other factors that my one working brain cell don’t remember

 

[Centex]

Houghton rooftop (NOT mini-split) installation

Hi, actually I won’t be the one installing an AC unit. It’ll be my cousin who has some electrical skill training, so I can wait until I arrive in Texas early April and don’t have to have the extra weight driving my 5th wheel there. Can anyone point me to installation procedures and whether I’ll have to have my cousin wire a separate thermostat if I purchase a Houghton 13.5 as many on this forum are recommending? My 5.0 is pre-wired for AC. Thank you! Almost ready to hit the road. Yay!!

To supplement the instructions provided by Houghton, here's a link to a Houghton installation which should be similar to what you / your cousin are facing:

https://www.escapeforum.org/forums/f8/houghton-a3400-install-21313.html

Since yours is an early 5.0TA ('airplane body') with a vent but no AC you may need add a breaker and run the 120volt AC line from your existing WFCO power center breaker box up to the AC (your trailer may not have those provisions but that should not be a problem for a competent electrical person). The breaker of appropriate amp rating per the Houghton instructions, to fit the WFCO box, should be available at Home Depot (temporarily pull one of the existing breakers and take it to HD to ensure a 'match' for type/configuration).

As mentioned, the thermostat / control is wireless.

Removing the existing vent and cleaning-up the old sealant around the roof opening will be a tedious chore. I urge that Pro Flex RV Sealant be used to seal the new Houghton mounting frame installed in the existing opening, not any other convenient 'Home Depot brand x' caulk or sealant. That new mounting frame should be included with the Houghton unit.

For your particular full-time occupancy in Austin I recommend the larger 13,500 BTU unit.

Just for your consideration, good luck.

 

[Centex]

dehumidification

This recent post about dehumidifiers reminded me of one of the many things I like about the 'rubicon Dave' Fujitsu mini-split modification ...

My trailer is stored outside at my house with shore-power connected, we have no shortage of high-humidity ambient for much of the year. Using the Fujitsu's timer function it's so easy to automatically run the unit a few hours daily in the 'dry mode' to keep humidity / moisture in the trailer under control through the extended periods of humid weather.

Yep, I love this mod, Thanks Again Dave for the groundwork, inspiration, and impetus.