4 ton 10 SEER air conditioner. What is your heat source? I assume you have another heating source or a furnace inside.

4 tons should cool your home fine in terms of tonnage, but a heat load calculation is the sure way to tell. If your ductwork is inadequate, it will not deliver its full capacity and may not heat or cool effectively/efficiently.

If you post the serial number we can probably determine date of manufacture. Definitely pre-2000. That's one of the Janitrol era Goodmans--not the highest quality units out there, partly contributing to some of Goodmans poor reputation now. If installed right, should give you decent service though.

Thanks,

The serial # is 99054208823

The heat is propane. Since it is pre 2000, would it make sense, if I make a offer on this house, to factor in the cost of a new heat and air system. (I'll get some local estimates)

How much more efficient is a 14/15 SEER over a 10 SEER?

Wife likes the "personally" of the older houses, I like the fact that the newer ones are more energy efficient.

Thank You,
Jim

If you can factor in the cost and get your offer accepted, I would certainly do that (for a new furnace and air conditioner, hopefully one that will qualify for the $1500 tax credit).

That serial looks like it's a '99 model, so it's already pushing 10 years. If I had to guesstimate, I would say it doesn't have much more life left in it. But maybe it does...

Given that your 10 SEER is likely no longer operating at 10 SEER, a good 15/16 SEER unit should show some good savings.

jlb

you should get a quote on a dual fuel/hybrid system to at least offset that very expensive propane heat. I would also recommend a load calc for correct sizing-both HP and furnace.

IMO