Author Topic: New Lennox AC & Furnace - Which Coil?  (Read 7359 times)

Offline jobjohnny

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New Lennox AC & Furnace - Which Coil?
« on: March 26, 2010, 08:02:23 PM »
I'm upgrading my natural gas furnace and AC unit to a new Lennox system.  I'll be getting the Lennox G61MPV-38B-071 furnace and the XC14-036 Air Conditioner.  

My question is which coil matches the air conditioner?  Two contractors quoted me the CX34-43B coil and the third contractor (the one I prefer) quoted me the CX34-31B coil.  I tried researching the differences in coils but I didn't come across a lot of info.  This is where I'm hoping you guys could help me out.  

Thanks in advance.

Offline JWWebster

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Re: New Lennox AC & Furnace - Which Coil?
« Reply #1 on: March 26, 2010, 08:55:54 PM »
CX34−43B−6F C33−43B= 28−1/2" x 68−1/2"(cased)  26−1/4" x 66−1/4" (uncased)
CX34−31B−6F C33−31B= 23−1/2" x 63−1/2"(cased)  20−1/4" x 60−1/4" (uncased)

Sources:
G61

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« Last Edit: March 26, 2010, 08:59:39 PM by JWWebster »
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Offline jobjohnny

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Re: New Lennox AC & Furnace - Which Coil?
« Reply #2 on: March 29, 2010, 08:28:42 AM »
Thanks for the info.

From what I can gather, it looks like the differences in the two coils is the size.  Please forgive my "newbieness" but I don't understand which size is appropriate.  Would it depend on the size of my house? Or is one coil better matched to my proposed heating/AC system than the other? 

This is a large expense for me and I just want to make sure I'm getting the correct equipment.

Offline JWWebster

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Re: New Lennox AC & Furnace - Which Coil?
« Reply #3 on: March 29, 2010, 01:23:24 PM »
How big is the space where the A-coil is gonna be? A lot of folks never think of maintenance till they need maintenance. While you have the opourtunity you should look at how easy this coil will connect and slide out so that when service time comes the unit can be removed easily for cleaning and repair. My opinion. Other than that the one that costs a little more is what I would go with. You get what you pays fer.
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Offline jobjohnny

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Re: New Lennox AC & Furnace - Which Coil?
« Reply #4 on: March 29, 2010, 02:42:51 PM »
We have a large unfinished basement so there are no problems with space.  Thanks for all the help.  I'll make sure we go with the larger (more expensive) coil.

Offline Icehouse

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Re: New Lennox AC & Furnace - Which Coil?
« Reply #5 on: March 29, 2010, 09:10:02 PM »
Coil that Lennox recommends : CX34-38B-6F
NATE, NCCER, PHCC,HVAC Certified Instructor
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Offline jobjohnny

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Re: New Lennox AC & Furnace - Which Coil?
« Reply #6 on: March 30, 2010, 10:34:54 AM »
Coil that Lennox recommends : CX34-38B-6F

Oh geez.  Now we have a third coil entered into the mix.  I'm guessing Lennox recommends the CX34-38B-6F coil since it matches the same numbers as my proposed furnace.  Do you have any documentation stating this? I'd like to show my contractor where Lennox is recommending this.

Thanks.

Offline Icehouse

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Re: New Lennox AC & Furnace - Which Coil?
« Reply #7 on: March 30, 2010, 02:05:45 PM »
Coil that Lennox recommends : CX34-38B-6F

Oh geez.  Now we have a third coil entered into the mix.  I'm guessing Lennox recommends the CX34-38B-6F coil since it matches the same numbers as my proposed furnace.  Do you have any documentation stating this? I'd like to show my contractor where Lennox is recommending this.

Thanks.
Lennox Engineering match up for your furnace and condensing unit.  O0
NATE, NCCER, PHCC,HVAC Certified Instructor
Member RSES, US Army Refrigeration Specialist(Retired), Former Refrigeration Teacher NYC Board of Ed.
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Offline Icehouse

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Offline jobjohnny

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Re: New Lennox AC & Furnace - Which Coil?
« Reply #9 on: March 30, 2010, 03:36:26 PM »
This will help : http://www.ltsplumb.com/Lennox%20Residental%20Catalog.pdf

Ahhh yes. Thanks. That's what I'm looking for.

Coil Match−up
All CX34 cased up−flow indoor coils
match furnaces with same letter
designation in model number.

 

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