rmcrist wrote:flboy wrote:If you really need a 14,000 BTU and have to do all that to make it possibly work, a rooftop would do it and use no more power or etc. that goes along with a large unit. You will just have to give up your 14" vent up top.
If you put on the recommended hose sizes, it will probably cool the space adequately even though not most efficiently. It is a large unit BTU-wise. Most Roof top units are 13,500 BTU.
If you do not need the BTUs, may be better long term and less expensive for you to design the installation for a window unit. They are tried and proven to do the job in smaller campers. There are many ways to do that as you know. Some are less complex than others. Most all have been successfull if installed with proper air exchange and right amount of insulation and etc..
In any case.. good luck with your project. Probably way more help than you wanted. :-)
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Thanks Don! My trailer will be 8.5x24 with 2 fantastic fans. I’m now looking at a window ac since it makes much more sense and cheaper. With the two fans and a 10,000 BTU ac, will that be effective in a trailer that large? I’m also trying to get away from the noise of a rooftop unit. I feel that there are easier ways to isolate vibration and sound on the window units. Thoughts?
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8.5*24 is a good size trailer so first let me say I do not think you can go wrong with a 13,500 BTU roof unit in this case. We all know it will do the job. With good insulation, a 10,000 BTU properly installed would probably do it fine also if you just do not want a roof unit. However, the larger BTU window size, weight, power requirements, costs, etc. all start to diminish some of the attractiveness a small window unit has for the smaller campers to start with.
Personally, because you have two vents... you can go with a roof unit and keep one fan which I think is important... if you hate the rooftop, you can always take it out and sell it after a season. You could then buy the 10,000 BTU unit with the proceeds and possibly a Fantastic Fan for the second vent hole the AC left. This way.... worst case.. you are only out about $300. (I have seen roof units going for $650 or so new these days).
The problem here would be if you put in the 10,000 BTU unit first and it just isn't doing it for you.. then you have holes in your camper where they may not be useful and are having to rebuild things. That will get expensive plus you still need the larger unit.
I hope this helps.. These are tough decisions... but is how I'd make it given your trailer size, margin for size needs, and etc.. .