Author Topic: Roof air or mini split??  (Read 1323 times)

Offline chessie4905

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Re: Roof air or mini split??
« Reply #45 on: July 17, 2018, 05:34:28 PM »
Just had an H3-45 pass us on the Pa. Turnpike today. It had about 4 or 5 roof airs. Man, he better stick to interstates.
GMC h8h 649#028 (4905)
Pennsylvania-central

Offline TomC

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Re: Roof air or mini split??
« Reply #46 on: July 18, 2018, 07:53:21 AM »
Since my truck conversion is 13'6" tall, no room for roof top A/C's. Dometic Penguin is capable of converting to basement air's with some modification and ducting. I ran one, it is is really quiet-can't even hear it in the bedroom.
Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.

Offline chessie4905

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Re: Roof air or mini split??
« Reply #47 on: July 18, 2018, 11:42:08 AM »
Don't worry about noise with rooftop airs. As you get older, your hearing goes away and it'll get quieter.
GMC h8h 649#028 (4905)
Pennsylvania-central

Offline DoubleEagle

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Re: Roof air or mini split??
« Reply #48 on: July 18, 2018, 03:52:28 PM »
Since my truck conversion is 13'6" tall, no room for roof top A/C's. Dometic Penguin is capable of converting to basement air's with some modification and ducting. I ran one, it is is really quiet-can't even hear it in the bedroom.

Tom, I am considering using some of the Penguins I have in the spare tire area up front on my Eagle. I would really like to hear more details about where and how you did yours. I get that the cold air has to be custom-ducted out, but what about cooling air flow for the unit, and devising remote controls? I have a 250V basement air main unit, but I would like supplemental A/C and backup that would run on 125V for campgrounds that only have 30 Amp. Your picture shows the unit on its side, is that just for the picture, or is that how you are mounting it?
Walter
Dayton, Ohio
1975 Silvereagle Model 05, 8V71, 4 speed Spicer
1982 Eagle Model 10, 6V92, 5 speed Spicer
1984 Eagle Model 10, 6V92 w/Jacobs, Allison HT740

Offline buswarrior

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Re: Roof air or mini split??
« Reply #49 on: July 18, 2018, 04:36:19 PM »
A regular house window AC unit can be ducted in a bay, and has the advantage of working off the side of it, instead of the bottom of a roof top.

Remember, you have to deal with the condensation from whatever home brew you choose!

happy coaching!
buswarrior
Frozen North, Greater Toronto Area

Offline windtrader

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Re: Roof air or mini split??
« Reply #50 on: July 18, 2018, 05:01:26 PM »
Been wondering for awhile why there isn't more discussion around using window AC or two in the bay with ducting into the interior. Seems like a very practical and inexpensive way to do it. BW post is first I have seen in awhile.
Don F
1976 MCI/TMC MC-8 #1286
Fully converted (June 2017)

Offline Oonrahnjay

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Re: Roof air or mini split??
« Reply #51 on: July 18, 2018, 05:24:53 PM »
  Been wondering for awhile why there isn't more discussion around using window AC or two ...

     Round these parts, that's called the "redneck's air conditioning system".  It's illegal to drive a "pop in" pickup camper without one in several states.
Bruce H; Wallace (near Wilmington) NC
1976 Daimler (British) Double-Decker Bus; 34' long

(New Email -- brucebearnc@ (theGoogle gmail place) .com)

Offline eagle19952

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Re: Roof air or mini split??
« Reply #52 on: July 18, 2018, 06:04:07 PM »
Been wondering for awhile why there isn't more discussion around using window AC or two in the bay with ducting into the interior. Seems like a very practical and inexpensive way to do it. BW post is first I have seen in awhile.

because cool air doesn't rise ?
Donald PH
1978 Model 05 Eagle w/Torsilastic Suspension,8V71 N, DD, Allison on 24.5's 12kw Kubota.

Offline windtrader

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Re: Roof air or mini split??
« Reply #53 on: July 18, 2018, 10:20:57 PM »
I'd assume an inline fan can move colder air from the bay up into the coach interior. I'm not a redneck so I must be missing something. :-\
Don F
1976 MCI/TMC MC-8 #1286
Fully converted (June 2017)

Offline GnarlyBus

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Re: Roof air or mini split??
« Reply #54 on: July 19, 2018, 12:44:11 AM »
We don't bother with a/c, yet. But I did have an idea at one point to install a house window unit by cutting a hole in the side of the bus under a window. Then I was thinking you could either use a fridge side vent or make a nicer door like many RVs use for their storage bays. It would be pulled into the bus when you moved. For those of us who don't move all the time it would be an option. The major advantage is cheaper and window units pump quite a bit of cold air.

But, there's many reasons we never did this. I don't think we will. It's ugly. :) maybe if we park the bus on our own land permanently someday...

If it gets too hot to be somewhere we move on. Someday that'll change and we'll probably go with the split units.
1984 MC-9 w/ 6v92TA & Allison 740
Oregon Summers & Arizona Winters
Full-Time since 2015

Offline luvrbus

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Re: Roof air or mini split??
« Reply #55 on: July 19, 2018, 06:32:18 AM »
I have a friend that built his own AC using the drivers AC evaporator in his bus (MCI) ,he added a Copeland compressor and condenser from something works good using 134A Freon.Electric fans replaced the DC motors has a BTU rating of 45,000 nice and quite with no extra holes cut in his bus.Probably not something the average bus person could do but he is a HVAC contractor so it came easy for him.People have been splitting the window units for years to use in a bus one comes here to the shop the owner did 25 years ago       
« Last Edit: July 19, 2018, 06:42:37 AM by luvrbus »
Life is short drink the good wine first

Offline chessie4905

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Re: Roof air or mini split??
« Reply #56 on: July 19, 2018, 07:31:53 AM »
I've kept my in dash evaporator in case I decide to go that way down the road.
GMC h8h 649#028 (4905)
Pennsylvania-central

Offline TomC

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Re: Roof air or mini split??
« Reply #57 on: July 19, 2018, 07:40:21 AM »
The unit is tilted just for the picture-it runs in the normal position on a pedestal high enough to facilitate the return and cold air (about 23" tall overall). Had special 8" duct made for return and 6" duct made for hot air from condenser. My units are of the molded plastic and metal fans. I understand that they are now styrofoam and plastic fans. Order 15,000btu units-same compressor, but more powerful fans for ducted and remote thermostat. Good Luck, TomC
Tom & Donna Christman. '77 AMGeneral 10240B; 8V-71TATAIC V730.

Offline luvrbus

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Re: Roof air or mini split??
« Reply #58 on: July 19, 2018, 07:50:05 AM »
I've kept my in dash evaporator in case I decide to go that way down the road.


It is a good idea I am restoring my dash air and it is costing a arm and a leg for parts to run from the engine
Life is short drink the good wine first

Offline eagle19952

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Re: Roof air or mini split??
« Reply #59 on: July 19, 2018, 08:10:03 AM »
I'd assume an inline fan can move colder air from the bay up into the coach interior. I'm not a redneck so I must be missing something. :-\

i only meant that a bus needs to be as efficient as possible.
regardless the amount of insulation.
where does redneck play into this discussion ?
« Last Edit: July 19, 2018, 08:12:36 AM by eagle19952 »
Donald PH
1978 Model 05 Eagle w/Torsilastic Suspension,8V71 N, DD, Allison on 24.5's 12kw Kubota.