I am interested in replacing my Rheem Condensing unit model #CFF-0250-
RFVC. I have a Goodman A30-10 air handler. Does anyone know what
condensing units would be compatible with my Goodman air handler. I
was thinking that the outside unit is a 2.5 ton unit and my house is
1,500 sq/ft. I would like to jump up at least 1/2 a ton if at all
possible on the condensing unit. What do ya'll think?
Tight budget and I don't want to replace the air handler if I don't
have to. I have A/C resources but am not a contractor. Are you
telling me the system is already screwed?? What is the PROPER unit
size? 1 ton = 500sq/ft?? Am I wrong? I know there are other factors
that can effect that calc but saying there are no other factors what
do ya think?
DON'T KNOW, I HAVEN'T DONE A LOAD CALCULATION ON YOUR HOME.
DEPENDS, DO YOU WANT IT DONE PROPERLY?
My thinking HAS NOT changed any...
Do a "load calculation", or settle for the quality that you pay for.
Low cost will equal a screwed up system. One that will not only affect your
comfort, but will cost you more in operational cost. You'll NEVER be happy
with it's performance, as you will be having it serviced constantly.
You have a choice, do it *right* now or do it twice. Doing it properly the
first time is a WHOLE lot cheaper.
As far as 1 ton per 500 sq/ft... do you think someone in NY, SD, or CANADA
will need as much cooling as someone in FL, TX or AR?
What if one has 2 x 4 construction vers 2 x 6?
What if one has R13 walls & R19 ceiling insulation vers R19 walls & R30
What if one has a basement and the other is on a concrete slab?
What if one has twice as many windows?
What if one has sky lights?
What if one has an attached garage?
What if one has a lot of shade?
What if one likes it 68 and the other likes it 78?
The list just keeps going...
GET A LOAD CALCULATION!!!!!!!!!!!!!!!!
On 26 Mar 2007 21:03:15 -0700, email@example.com wrote:
I think since you "Have A/C resources" you should go ask your
He should know that with your Goodman A30-10 you can go all the way up
to 7-1/2 ton with that unit. Just use a .08687549 piston.
Make sure you drain and flush system the new condenser oil and
recharge with a good 5W40 SAE oil. Then surface spray the new unit
with a Boric acid water mixture and belt sand the new outdoor coil
till its nice and shiney.
I read the posts all the way down to gofish & must say there is a lot of
detrimental advice in some of the posts.
The first thing to do is everything you can to reduce the heat-gain
heat-loss of your home.
Then have a manual J calc done to determine the load or sizing the new
Forget the 500-sq/ft per ton nonsense! I cool over 900-sq/ft first floor
with a half-ton 6,000-btu/hr in a 1930's home with leaky windows.
This is in SW WI with up to 104 Heat Indexes.
It does a perfect job with no cooling upstairs; the moment you go up the
stairs ou enter the hot air.
When I turn the other small room a/c on it cools th small bedroom,
hallway & bathroom. I use floor fans to circulate the air.
There is nothing wrong with Goodman equipment however I would go NO
higher than a 14-Seer unless you live in Florida or southern most Texas.
The 14-SEER has the Scroll compressor the standard 13-SEER does not, I
would not buy a condenser that did not have a scroll compressor.
Have every aspect of the entire ductwork system thoroughly checked.
- udarrell Darrell
WISDOM PRINCIPLED EMPOWERMENT COMMUNICATIONS -
THE REAL POLITICAL ISSUES and WISDOM BASED PEOPLE EMPOWERMENT
I think that you need to trash the 35+ year old Rheem condenser *AND* that
POS Goodman air handler you got now, call a *competent*, licensed, insured,
professionally trained, HVAC techinician do do a complete room-by-room
Manual J heat load/loss calculation, along with a Manual D duct calculation
to correctly size, design, and install your new comfort system.
This is a long term investment that when done correctly, will give you many
years of energy efficient, trouble free operation. OTOH, you can get the
cheapest POS, installed by some stupid fuck that doesn't have a clue, have
your warranty voided from the start, have higher utility bills that what you
have now, have lots of very high repair bills, etc.
Its your money...you can do what you want.
Goodman has all their specs on their web site. You should be able to find
out if it is big enough to go to a 3 ton. Obviously a goodman ac condenser
will connect to your airhandler. But just about any other would as well,
you may just need some sheet metal between the two.
You do not want to oversize your ac. If you do it will run for shorter
periods and will not remove enough humidity. The result is cold damp air.
Keep that in mind as your consider upping by a 1/2 ton.
I was assuming that all he is keeping is the ar handler. The question was
"what size ac is compatible with my air handler". I (perhaps unwisely)
assumed that he meant the air handler, not the inside coil, because he said
air handler. I agree, the inside coil needs to match the outside unit. As
long as the air handler has enough cfm for a 3 ton ac then he does not need
to replace the air handler. But he should buy a complete ac set, outside
unit and inside coil.
in todays market place the only thing compatible with your goodman air
handler is a 10 seer condenser. get the cheapest one you can find on
e bay or the web. install it yourself. you'll save thousands. bank
the savings, because you will need it......with 1500 sq ft, you'll
need at least 3.5 tons. Go for 4, for that extra margin of 'coolness'
for those really hot 100+ days coming up this summer. global warming
On Mar 27, 8:55 am, firstname.lastname@example.org wrote:
Thanks for your post and for acknowleding that I'm not a complete
idiot. I never stated I was an expert or know it all, that is why I
am here asking these questions. With that being said let me clarify
my situation, I live in Houston, TX....I have a 1 floor house......I
have single pane windows.......my duct work seems fine (no damage nor
leaks),,,,the unit currently pushes out 60F on 80F days....my electric
bill has been 190 at the most durring the summer......I run my unit at
75 and that's good enough for us to sleep at nite..........yes it is
hot as hell down here........I'm not too concerned it the unit runs
and turns off too quick.....the unit I have now currently runs it's
ass off......especially on 95F days...literally runs and runs can't
keep up with the "air loss" in the home.....I have a "low pitch" roof
which heats up very quick....the attic acess door is above the return
air........and the thermostat is across from the return air
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