Hello,
I am investigating the possibility of installing a
ductless split AC system in my small apartment (665 sq
ft).

My question is whether the "outside" unit of the split
system needs to be outside or on a roof? Can it be in
the utility closet which currently houses the furnace
and water heater?

thank you for any feedback,
Jason.

"Jason" wrote in message
oups.com...
Hello,
I am investigating the possibility of installing a
ductless split AC system in my small apartment (665 sq
ft).

My question is whether the "outside" unit of the split
system needs to be outside or on a roof? Can it be in
the utility closet which currently houses the furnace
and water heater?

thank you for any feedback,
Jason.

Yes the condenser must go outside. Location to be determined by the unit
and installation needs.
Other wise your just moving the heat from one room to another instead of
removing it.

the outside unit must be outside to work correctly, but a roof is OK

also, it needs to be out of direct sunlight if possible, you will save a lot
of money if it is in shade, so I would consider a little hut over it, if
mounting on the roof, just make sure that the unit has plenty of space on
all sides and on top, at least 2' all around, and the airflow around it is
not restricted by the "hut"

natural shade is fine too, such as from a tree or neighboring high-rise
building


cheers!

cowboy

"Jason" wrote in message
oups.com...
Hello,
I am investigating the possibility of installing a
ductless split AC system in my small apartment (665 sq
ft).

My question is whether the "outside" unit of the split
system needs to be outside or on a roof? Can it be in
the utility closet which currently houses the furnace
and water heater?

thank you for any feedback,
Jason.

Hi cowboy, hope you are having a nice day

On 28-Jun-05 At About 09:08:29, cowboy wrote to All
Subject: ductless split A/C system

c From: "cowboy"

c the outside unit must be outside to work correctly, but a roof is OK

c also, it needs to be out of direct sunlight if possible, you will
c save a lot of money if it is in shade, so

I don't know where you get your info but shade doesn't matter.

c I would consider a little
c hut over it,

not needed.

-= HvacTech2 =-


... URA Redneck if you've ever worn a cowboy hat to church.

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spam protection measure, Please remove the 33 to send e-mail

"HvacTech2" wrote
Hi cowboy, hope you are having a nice day

On 28-Jun-05 At About 09:08:29, cowboy wrote to All
Subject: ductless split A/C system

c From: "cowboy"

c the outside unit must be outside to work correctly, but a roof is OK

c also, it needs to be out of direct sunlight if possible, you will
c save a lot of money if it is in shade, so

I don't know where you get your info but shade doesn't matter.
-= HvacTech2 =-


actually shade matters a lot in your utility bill, that is why I said it
would cost less.

I will explain the physics of it:

how hard the compressor has to work is proportional to the head pressure it
is up against, and a shaded condenser is cooler, and therefore has a lower
head pressure at the same ambient temperature, not to mention that the final
temperature out the ducts will also be lower, which will allow the unit to
stay off for a longer period of time, even further saving money.

so the long and short of it is, a unit will work just fine in full sun, but
it will work a lot cheaper in shade

in wintertime, a heat pump would work a little better in sun than in shade,
but not nearly enough to offset the summer saving, not even close.


cheers!

cowboy
hvac engineer & tech

Hi cowboy, hope you are having a nice day

On 28-Jun-05 At About 10:11:03, cowboy wrote to All
Subject: ductless split A/C system

c From: "cowboy"


c actually shade matters a lot in your utility bill, that is why I said
c it would cost less.

As I said before, you are mistaken. the air over the condenser coil keeps it
cool even with the sun on it. sunlight has a very minute influence on the
head pressure. please get some training somewhere before you try to answer
these questions. you really do need it.

-= HvacTech2 =-


... I'm not really a cowboy. I just found the hat...

___ TagDude 0.92á+[DM]
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spam protection measure, Please remove the 33 to send e-mail

c actually shade matters a lot in your utility bill, that is why I said
c it would cost less.

As I said before, you are mistaken. the air over the condenser coil keeps
it
cool even with the sun on it. sunlight has a very minute influence on the
head pressure. please get some training somewhere before you try to answer
these questions. you really do need it.


you are really embarrassing yourself in front of everyone, this point is not
even debatable!

you don't get to defy basic science, no matter how clueless you are!

if you really believe this (because you have never had a class in basic
thermodynamics, and are basically just a stupid redneck with a GED) you can
easily prove it to yourself by doing a simple experiment that even YOU can
understand!

hook a clamp on ammeter around the unit's lead-in, measure current draw
after running unit in the sun for an hour in the hot part of the day, then
shade condenser and measure in another hour (make sure that the ambient temp
outside is the same in both cases)

you will see a significant difference in energy consumption!

here is a good book:
http://www.amazon.com/exec/obidos/tg...l/-/0486632776
ISBN: 0486632776

please do us a favor and read it, you look like a horse's ass to the
engineers and scientists that lurk on this board!

cheers!

cowboy

Cowboy,

While there is a VERY SLIGHT energy savings from shading the outdoor
unit, the cost of building the hut over the onit will exceed the energy
savings over a long time. The payback is likely to exceed 10 years,
depending on construction costs and local energy rates. Look at how
much heat is rejected to the air vs how much solar gain you get. The
solar gain is a very small percentage of the heat rejected. Just
figure the heat input from the sun is about the same as the solar gain
for a like sized single pane window. Also consider that any shelter
you erect is going to restict air flow some or cause air recirculation.
Either will reduce efficiency of the system, possibly more than the
savings from reduced solar gain. Cowboy, you are just spitting in the
wind. Are you possibly related to Nick at Villanova? You sound a lot
like him!

Stretch


Stretch

sorry guys, but just because the majority have the same opinion, that
doesn't mean its not wrong!

if you doubt that, look at the election last November, the idiot "majority"
elected the worst president of my lifetime

sometimes you have to pay the price for your mistakes

and some people will never learn!

"Stretch" wrote in message
oups.com...
Cowboy,

While there is a VERY SLIGHT energy savings from shading the outdoor
unit, the cost of building the hut over the onit will exceed the energy
savings over a long time. The payback is likely to exceed 10 years,
depending on construction costs and local energy rates. Look at how
much heat is rejected to the air vs how much solar gain you get. The
solar gain is a very small percentage of the heat rejected. Just
figure the heat input from the sun is about the same as the solar gain
for a like sized single pane window. Also consider that any shelter
you erect is going to restict air flow some or cause air recirculation.
Either will reduce efficiency of the system, possibly more than the
savings from reduced solar gain. Cowboy, you are just spitting in the
wind. Are you possibly related to Nick at Villanova? You sound a lot
like him!

Stretch



We won't see too much more of him. He's running with his tail between his
legs...