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Old 06-28-2013, 10:02 PM   #11
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Re: Lets talk AC again

This is my thinking: http://www.amazon.com/SPT-Window-Condit ... PDKIKX0DER
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Old 06-28-2013, 10:12 PM   #12
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Re: Lets talk AC again

I like Lorna's idea of two smaller units for each half of the bus. It will be hard for the one 12,000 btu to cool a long narrow bus. Unless you can duct it.

All my friends who own "real RV's" say one 12,000 btu will barely do it, you will need two 12,000 btu units. They all have 50 amp hookups. I want to stay at 30 amps also. I plan to move if it gets over 90, so 90 - 20 = 70 will be good enough for me.
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Old 06-28-2013, 11:47 PM   #13
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Re: Lets talk AC again

I only have 110v and no plans on going 220. We dont need it much of for long. I guess I can only try it. Having one unit hanging out of the bus is as redneck as I want to look. Dont really like that but I have no other options. It generally gets to 30's - 40's here ever night during the summer.
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Old 06-29-2013, 08:55 AM   #14
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Re: Lets talk AC again

I guess being in Texas (which is was close to 105 here yesterday) that 2 units seems it would be a must have? I am planning on 2 15k btu rv units on the roof. When I bought the bus is had one 13k but it looks ummmm old and worn out so it will be replaced and a second unit coming on line. I guess I am wondering how you guys survive going down the road with no generators to power theses? Granted my bus is still in the cocoon phase but there is no way in HELL that I would attempt to travel in my local with out AC's and generator?

One note to pass. AC's remove heat to a less objectionable area so they don't necessarily puke out cold. So insulating and closing out air infiltration is a must have to make them work efficiently as possible.
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Old 06-29-2013, 01:57 PM   #15
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Re: Lets talk AC again

Quote:
Originally Posted by opus
... Having one unit hanging out of the bus is as redneck as I want to look. Dont really like that but I have no other options...
We have a Bluebird All American as well. We don't care for the A/C unit hanging out the window either. Neither of our two A/C units hang out anywhere. On the exterior, they are flush except for the wind deflector. On the interior, they will have cabinetry wrapped around them, making them appear built in flush. Besides,we had really nothing in the space we ended up installing the A/C units. Just needed the willingness to cut a couple holes in the front and resr of the bus.
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Old 06-29-2013, 02:48 PM   #16
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Re: Lets talk AC again

I saw your pix and thought of that but I dont want anything on the inside either. And I didnt want to start whacking holes in the steel. Had I to do it from scratch I would have a ducted unit with everything in the bays. I'm not putting a lot of cosmetic effort into this bus. It just a "thing" and I could wrap it around a tree tomorrow and it would all be lost. I'm a functional gear head type of guy. If we make this post last long enough, we'll be into snow pretty soon and I wont end up doing a thing.
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Old 06-29-2013, 05:51 PM   #17
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Re: Lets talk AC again

Quote:
Originally Posted by opus
... If we make this post last long enough, we'll be into snow pretty soon and I wont end up doing a thing.
Then you'll be complaining about heating your bus! What you need to do is go to cooler places in the summer and warmer places in the winter. Unfortunately that does create a problem... over time, you become accustomed to a narrow range of temps and when it drops below your comfort level, you think you are freezing. When it goes over your comfort level, you think you are burning up. I know from experience. I spent most of my summers in the mountains of southwestern NC from 1965 - 1978. My winters were spent on the east coast of FL about 1-1/2 hours north of Miami.
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Old 06-29-2013, 06:54 PM   #18
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Re: Lets talk AC again

Oh heck, we were out a weekend where it was -16 and we were hot inside.
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Old 06-30-2013, 11:55 PM   #19
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Re: Lets talk AC again

Quote:
Originally Posted by bapos
I guess I am wondering how you guys survive going down the road with no generators to power theses? Granted my bus is still in the cocoon phase but there is no way in HELL that I would attempt to travel in my local with out AC's and generator?
I'm scratching my head with exactly the same question. Most of the reports here seem to be stationary use sometimes with shade involved. That's a much easier proposition for air conditioning.

My only bus air conditioning experience was basically a failure. It was in a 35 ft Blue bird skoolie with 5.9L front engine. All glass except the windshield was tinted with a Solar Gard product; it is wonderful stuff and did a remarkable job of blocking heat in addition to tempering the visible light. For mock-up purposes I used some OSB sheeting and mounted one 6000 BTU air conditioner in a window near the front and another near the rear. Yes, it was dreadfully redneck, but I tried to console myself by saying that it's okay for an experiment to be kludgy so long as I promise to re-do it nicely if things work out. I intended to power them with a Honda EU2000 generator mounted on the trailer hitch at the tail. Testing at home in the driveway demonstrated that this genny could run both units, but road testing showed otherwise..

Our trip was late in July with outdoor temperature around 98 F. We caught the heat of full afternoon sun plus more heat from the front engine rising through the floor. My family were riding in a pair of booths formed by flipping the front bench on each side to face backward; the front A/C blew into this area. We didn't get far before finding that the genny wouldn't run both A/C units after all; maybe their power consumption or at least start-up current was higher because the day was hotter than it was in my pre-trip testing. Who knows. So we ran only the front. My wife reports that the temperature in the immediate area around that unit was tolerable but not quite pleasant. Just a few feet away in the driver's seat I couldn't figure out what she was talking about: I was melting! We drove eastward so at least I was in the shade of the roof but still it was unpleasant. In the end the EU2000 wouldn't reliably keep even the one unit running and we surrendered to opening most of the windows; sunset couldn't come soon enough!

Things I learned: the front engine contributed LOTS of heat to the bus. Even tinted, there was plenty of glass and abundant solar heat gain. The yellow walls and roof did their part to transmit heat too. That 6000 BTU A/C was no match for all that heat gain, and I suppose there was plenty of air exchange that didn't help things either.

What to do better? I've dumped that bus and found another with rear engine and white paint, and I plan to remove most of its windows and liberally apply insulation. Bus-kote or similar on the roof. All that will reduce the heat gain, but I still don't know what I'm going to do for the cooler. May have to partition the space so that a much smaller area is used while driving and cool just that. May have to get another EU2000 or some other larger generator. Might try some scheme where a compressor has dual clutches to be driven by the engine or an electric motor, or maybe independent compressors connected to engine and electric motor. Might put together some kind of evaporative cooler and hope for the best. We'll be doing some experiments this summer.
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Old 07-01-2013, 01:13 AM   #20
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Re: Lets talk AC again

Great, continue on. You can be the test rabbit for now. Thank you. ;)
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