Is it cheaper to use a window unit other 2 rooftops ?

fordsooperdooty wrote:

A window unit is supposed to sit semi-permanently mounted firmly to an window sill that DOESN'T jiggle, bounce, go 60 mph down a road and rattle it's teeth.

Which is going to last longer?

I have a 1996 Roadtrek with a factory installed window AC that still works fine. I dont think they are as sensitive to bouncing as you think.

Cheaper to just use the two on the roof, cause then you don't have to buy a window one and go thru the expense of re-enforcing the wall where you plan on mounting it.

Thanks to all who responded it was a big help. Jim

Perhaps the OP was thinking about the effect of the sun shining directly on the exterior of the AC unit sitting on the roof? Just speculation... (And they're white, and designed for it... I doubt there would be much difference. Best way to save electricity - which is not necessarily the same as saving money - is to turn it to a higher temp setting, or not run it at all.)

He even has a generator, so he can dry camp. Wonder if he has a porta potty in there?

Go with the window unit. Works for this guy:

To your question, No it would not be cheaper. Makes no difference if you are camped at a park but because you pay for that elec. As others have said you will need 220v hookup not available at parks that Im aware , far and few between if any! If you are in a place where you have to pay your own electric, then the roof air is efficient. Why mess with the rubber seal around the window or cut a hole in your wall. I personally think a window unit in a camper looks tacky unless its an older unit and a window unit is the only option due to no wiring on the roof for a roof air unit.

You say its going to be stationary for several months at a time. If at home, I'd have a 30A receptacle installed where its going to be parked. And make sure an electrician does it. Here's the instructions, and they're different. Long term at a RV park, it will already be wired properly.

Scratching my head on this one. If you have an RV with 2 rooftop ac's why would you want to use a window mount that blasts air into one room vs a ducted system designed for your RV? As others have said installing a window unit on an RV with rooftop air is obviously not designed for a window application might be a bad idea. The amount you save, if any, would have to be immeasurable. Are you counting pennies? Sorry, I don't get it. :)

bushnell wrote:
Would it be cheaper go with a window unit or just use the two roof top units already on unit?

Define cheaper?

Do you have the window unit or will you be buying? After buying a new unit any savings will disappear.

Are you trying to save electricity?

Keep in mind that window units are usually 5,000 to 8,000 BTU which is substantially smaller than the rooftop unit.

If two units have the same efficiency, a smaller unit running constantly will use less electric than a larger one running occasionally.

A smaller unit running constantly will also reduce humidity better than a large unit running occasionally.