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Thank you to each of you who took the time to respond! I greatly appreciate your feedback.

I have confirmed that the furnace is 40,000 BTUs and 2 tons, so it sounds, from what you all have said,...

Do you see any obvious reason that the proposed Trane system is a bad choice? I am happy to not be a stickler and just know that we are not making an obviously BAD decision, being deceived in any...

Here is the specs page for the furnace proposed:

http://www.trane.com/Residential/Products/Gas-Furnaces/XT80-Gas-Furnaces

What is AFUE? These are the specs it shows for the furnace being proposed: AFUE 80

What does that mean? I'm also very confused by the specs the Trane web site shows for this furnace versus the...

We are keeping the downstairs equipment as is. We are replacing ALL of the equipment for upstairs (except the duct work).

No - we are replacing the condenser, coil, furnace - all the primary equipment (not the ductwork). Someone else posted asking about what equipment we currently have - that is why I posted that info....

Okay, so this is for the equipment I currently have? How do I know what I need when I replace this whole system? I apologize for being slow to follow here.

Thanks, Mr Bill! So how do I identify which Trane model furnace I would need - and how much less should it cost me than the model suggested?

Why is this process so confusing and so difficult to...

So what do I likely need for my 2-ton condenser unit in your estimation in Texas?

I am getting more confused. 90K input on a 2 ton AC? No idea what that means. I know that a 2 ton means 2 tons of capacity. I have no idea how that related to input specs. I also don't know if...

Adding - I should also mention that our home is insulated (probably not amazingly well) but has leaks for sure (doors, windows) and has single-pane aluminum windows (probably original to the house). ...

Nobody is trying to sell me savings. I am selling myself savings (because our electric bills on our 2300 square foot house are approximately the same as my mother's 6600 square foot house).

As...

My current condenser is THIS ONE.

It is very hard to read the numbers, but this is the best I could surmise on the inside units:

Amana GUIC090CA30

Amana cca24fcc

Does this help?

Okay - I'm heading out to write down exactly what we have now. Going forward from this post, I am talking about only the upstairs system (because that is all we are replacing now). I apologize for...

One more thing - from our perspective, we are interested in getting the system that will get the job done (don't need any extra bells or whistles) and will be the maximum return on our investment...

Thanks so much for all the advice!

Could you guys please explain to me why you would reduce the size of the furnace? What difference does it make to have an 80 furnace versus a 60?

I...

house is 2400 square feet. We've never had any problems with not being able to cool areas or with humidity. We are replacing what we have now upstairs, which is a 2-ton system.

Here are all the...

Let's assume these are all 2-ton systems. I've been getting quotes on systems for upstairs and downstairs, so that is where the confusion on the sizes is (my fault).

Our current systems are old...

Sorry - I did not realize that was not allowed.

Replacing our upstairs system (2 tons) in our two-story 1960s era house in North Texas (hot, fairly humid in the very long summer, very little time when heat is really needed during the year - but it...