[madden25]

I am currently obtaining estimates for replacing my air conditioning unit, keeping my current York natural gas furnace. This unit is slightly less than 9 years old, 10 seer, r-22 coolant. I was told my compressor is "on its last legs", and am shopping around to see what current pricing is.
My current system is 4 ton, and every one I have talked to agree it is oversized for my house. I have a 1700 square foot house with attatched garage, one of the contractors measured 1400 square feet of air conditioned living space.
I live on the Gulf Coast, it is hot and humid most of the year, and the furnace gets its heaviest use for maybe 2 months of the year. In a warm year, sometimes you are running the air condtioner into the winter months.

One of the contractors proposed a 3.5 ton condensor, with a 4 ton coil, he says the larger coil is a better fit with the current furnace.I am wondering if this would cause problems, or if it makes sense to do this. No others suggested this.
3 of 4 recommended 3.5 ton units, and 1 reccomended a 3 ton unit.I will change to the new 410-a .
Thanks for any insight you can offer.

 

[Jabarco]

I live on the Gulf Coast, it is hot and humid most of the year......

Any configuration can lower the temperature but not all can lower humidity.
If it's always humid where you're at and you want to be comfortable, don't mix tonnage.


Jabs

 

[BaldLoonie]

Did any do a "Manual J" heat gain study? That involves measuring house, walls, windows, doors, checking insulation level, then plugging the info into a program to see what size you really need. I bet the 3 ton guy did, the rest are just staying big to CYA's. The smallest unit that can do the job costs the least to buy, the least to run and makes you the most comfy. Bigger is NOT better. Same with coils and airflow. Smallest possible coil, lowest airflow for the size of the unit.