| Author |
Message |
Pat Bartlett (Muddog16)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, February 18, 2005 - 2:16 pm: | |
I raised the roof 9 inches the orginal height was 11'3" now i'm 12', i decided that i needed three air conditioning units, i'm needing to know what the pro's and cons' of each system might be, and of course suggestions of where to buy would help also, Thanks again, i can't begin to say how much i appreciate all of the different idea's you all have, i'm sure i could have done this without the help, but i can't imagine the time i would have spent doing research and searching, One of these days the beer is on me......! |
Ron Walker (Prevost82)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, February 18, 2005 - 2:35 pm: | |
If you want roof air buy low profile Dometic Duo Therm Penguin A/C ...they're anly 9" tall that will give you 12'-9"
Click on my name to see my bus...8" roof raise /w penguin A/C
Ron |
TWODOGS (Twodogs)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, February 18, 2005 - 2:53 pm: | |
as long as you stay under 13'6" you are fine...
I would vote for roof air,,,this way..you have a choice of how many units you run at a time,depending on the heat of the day,plus the simplicity of instalation..
on a side note...I would fiberglas the inside of the covers..they are sub-standard
colaws r.v. salvage in Mo. |
FAST FRED
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 19, 2005 - 6:05 am: | |
How much noise inside you enjoy and weather you can stand the "look" of rooftop air cond carbunkles , would make the decision.
Not "Efficency" which is hard to quantify'
Basement costs little more than carbunkles , tho the instalation is trickier (You gotta READ DA BOOK!)
Split systems are really fine , but not too avilable in 120 in larger sizes , so you would need 2 or 3.
Cruseair is the most common split system .
FAST FRED |
John that newguy
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, February 19, 2005 - 8:14 am: | |
Welch makes nice systems designed for trucks and buses.
http://www.welchindustries.com/convkits.html
After talking to an owner of a fairly new "Beaver" stick and staple,
and listening to his comments regarding the basement air in his
$450,000 "palace".... I have finally decided to remove the bus
air completely and leave the Welch system where it is as a backup.
I'll be using roof air units.
The basement air units have to push cold air up and drag the
hot air down. Everyone I've talked to with basement air seemed
to feel the same way... it's not as efficient as rooftop air.
In a commercial bus, where you need the headroom for passengers
and no complaints about "cold drafts", the floor vents are fine. The air
is pushed up under the window, keeping the passenger feeling cool.
That 7 ton unit is engine run, so it's not a power problem.
In a motorhome, they don't use a 7 ton unit. Smaller sized home
type units are installed, but just do not have the capacity that the
OE ac had. Two rooftop units can serve the purpose better than
basement ducted air can. With the rooftops, the cold air is falling
down directly out of the AC unit. With the basement model, you're
cooling the ductwork before the air comes out of it and into the bus.
The split systems are great, but you lose some cooling ability through
the tubing run. You'll need more power to run a compressor that's
bigger than the one in a self contained unit. There's also a greater
chance for leaks from vibration, since there's more tubing and seals
to deal with.
I am now planning on using the new "low profile" roof models. They
come with heat strips and an exhaust fan.. |
FAST FRED
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, February 20, 2005 - 5:57 am: | |
"The basement air units have to push cold air up and drag the hot air down"
They usually do this as its the cheapest and easiest to install.
IF the duct sizes are done properly,
(to Da Book from the folks that BUILT the unit)
the basement is very easy and QUIET to live with.
The coach fills with cool air and the heat is taken from the highest points with good sized ductwork.
They DO work wonderfully if done correctly,
but like most things can easily be botched by "Compromise".
FAST FRED |
Cliff (Floridacracker)
Rating: N/A
Votes: 0 (Vote!) | | Posted on Sunday, February 20, 2005 - 8:01 am: | |
Pat,
I too have been going over the pro's and cons on the A/C system. I have deicded to go with the best of both worlds. I am going to use roof top units that are ducted. The roof top units are louder for sure , but if you duct them you can really quite them down.
In some of the equipment buildings I maintain we have four-five ton A/C units in a 1000' square foot space. You could hardley hear yourself think when they were running. They dumped directly out of the air handler, like a roof top. We added 8' of duct and about six vents and they quieted right down. All that air volume was being forced through such a single smaller output. Sort of like our roof tops.
I am planning on using the same concept in my coach air.
Also I can get a new unit overnighted or bought locally if I need one anywhere in the country.
And last is the no single point of failure(excluding a mismarked bridge clearence or a low tree limb) and no additional interior space needed for the air handler(s).
Cliff |
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