Largest size of a residential A/C unit
wiqui
3 Five ton units because that is the largest residential unit that they can
get.
He mentioned that a larger unit would require a "tri phase" electrical
connection. This sounds like a lot of bull to me.
I find it hard to believe that a 3000 SQF home can't just have a big 20 ton
A/C/
Please let me know if I'm being taken for a ride
Thanks
CBHVAC
My question is....where in hell do you live that you need 15 tons of cooling
in a 3000SF home? In Palm Springs CA, the middle of the desert, we never ran
into anything like that...not for that SF....
Now....we DID do one that took over 40 tons of cooling...but...it was a hell
of a lot larger than 300SF, and we actually used a chiller....
Five tons is the largest res unit made...and you can get those same units in
3 phase....but go larger than 5 tons, and almost all the units use 3 phase
power...
So no...hes not shooting you a line of bull...unless its in the tonnage...I
would LOVE to see the manual J calcs on that place......he DID run a manual
J didn't he???
--
www.carolinabreezehvac.com
www.ebaystores.com/id=19893971
"wiqui" <wi...@hotmail.com> wrote in message
news:5%TK7.199619$W8.75...@bgtnsc04-news.ops.worldnet.att.net...
VهدrXpêrt
>I was just told by the local Carrier Installer that I would have to install
>3 Five ton units because that is the largest residential unit that they can
>get.
>
>He mentioned that a larger unit would require a "tri phase" electrical
>connection. This sounds like a lot of bull to me.
It's not bull.
>
>I find it hard to believe that a 3000 SQF home can't just have a big 20 ton
>A/C/
My house is over 3000 SQF and uses a single 3 ton unit.
Most homes that we've put multiple 5 ton units in are 10,000+ SQF.
Did you by chance leave a 0 off that 3000 figure?
If in fact you do own a 30,000 SQF house why would the cost of your
hvac system even be of concern?
George
SMWIA Local 20
wiqui
ask!
This is a big 600 + units development. He said that he has installed this
system over 20 times in the same model home. I guess he knows it by heart.
But I just don't get a good feeling when I don't have the knowledge or the
tools to corroborate what someone tells me.
"CBHVAC" <st...@carolinabreezehvac.com> wrote in message
news:PQWK7.107$mF3....@eagle.america.net...
db...@sprynet.com
3 ton units??? or do you live in the pits of hell??? 20 tons of a/c will
blow you out, stay away from this guy, he is either drunk, crazy or
thinks that you are and is ready to take advantage of you????
He is probably right that you would need 3 phase for 20 tons of a/c
but you dont need 20 tons, NO,NO,NO, this guy is an idot or
something???? go, run to the next guy in town and see what they say you
need???? and you dont need three 5 tons of a/c either......unless you
planning on hanging meat in the building????????? its gonna be too cold
or you gonna have too much air for the building... if he is calculating
the house, he probably has to go back to grammer school to go over his
math?????
wiqui
I've just about spent all my savings on it. I'm on an extremely tight
budget!! I need to find a A/C system for it that won't cost over $5000.
That is the absolute maximum I can spend, including labor. I don't know
whether this is enough or not, but this is what I have. If its not enough,
then some of the rooms will have to do without A/C
Now the dificult thing about this home is that its all made of concrete,
including the ceilings. It doesn't have any insulation whatsoever. Most of
the corners are made of glass and there are a lot of single pane windows and
skylights. I guess the architect never heard of insulation. We live in
the tropics so we have a costant temperature all year long of about 80-90
every day and perhaps as low as 70 during nights.
I have 14 feet high vaulted ceilings on the Master bedroom and the great
room but the rest of the home has 8 feet high ceilings. Since this home was
not designed to have central A/C I'm planining on installing an accoustic
ceiling whithin the house so that I can route the ductwork. That being the
case I want to use the smallest duct pipes that the system would allow. The
bigger the pipes, the more I have to lower the ceiling. During the process
I want to add some insulation for the ceiling at least. That's a separate
budget!
The space in between the master bed and the great room is only 8' high so
the plan is to place 2 complete package units on that roof and have the
ducts penetrate to the inside of the home. Once inside the ducts can supply
all the fresh air and take the return air back to the units.
The master bedroom is about 22 feet long by 14 feet wide and 14 high. It
also has a 10x10 walk in closet and a 10x 15 master bath
The great room is 27 x 18 x 14 and is connected to the dining room 18 x 12
and the kitchen, breakfas room and laundry room.
The three extra bedrooms are a bit of a problem since there is almos no
space for the ductwork. Lowering the ceiling when you only have an 8' high
roof line doesnt look that good. So we are thinking of having a split unit.
A big compressor on the roof and three fan coils one for each bedroom.
"VåÏrXpêrt" <vair...@hotmail.com> wrote in message
news:3bfc40c1...@news.netnitco.net...
Richard J Kinch
>I find it hard to believe that a 3000 SQF home can't just have a big 20
>ton A/C/
>
>Please let me know if I'm being taken for a ride
20 tons is about 4 times too much, unless this house is on Venus.
John Paquay
I agree. Unless the original poster lives in Death Valley, 5 tons
should be enough - maybe 6. I can't even imagine a scenario that would
require 15 tons in a 3,000 sf residence, unless you're trying to cool
the house with all the windows open on a 110 degree day. This local
installer sounds rather deranged.
And no, I've checked. NOBODY makes a single phase condenser larger
than 5 tons. To go any larger than five tons you either need to
install multiple condensers or go to a three phase unit. We specify
installations with multiple single phase condensers all the time.
Unless you're cooling a gymnasium, it's almost always much cheaper and
just as efficient to go with multiple units. Besides, with multiples
you have some redundancy when one of the units craps out.
A $5,000 budget for a home this size is reasonable in this neck of the
woods. I'd get several quotes from other, more reputable HVAC
installers.
John Paquay
jpa...@home.com
"Building Your Own Kitchen Cabinets" -- ordering info located at:
http://www.members.home.net/jpaquay/shop.html
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John Hines
>I was just told by the local Carrier Installer that I would have to install
>3 Five ton units because that is the largest residential unit that they can
>get.
>
>He mentioned that a larger unit would require a "tri phase" electrical
>connection. This sounds like a lot of bull to me.
5 tons of A/C translates into 5HP of compressor, and that is the largest
motor you can get on single phase power.
And yes, as many people have found out, the power company won't run 3
phase to residences. (or municipal code won't allow it)
In a large residence, I'd think zoning with multiple units would be more
effective overall, given the different areas and needs, it would be hard
to balance a single unit over a large area.