Hi, this forum has been so good to me already. Thank you.
I'm debating between a 4 or 5 ton trane 19i air conditioner, the stages would match my zones nicely. I currently have a 10 seer 5 ton trane that is 17 years old. When working correctly, there were no humidty or other problems (other than it didn't match my 3 zone duct work!)
The load calc is between 4 and 4.3 depending on addition of several hundred feet of space with no registers (hallways, pantry---conditioned, but no register so the sales guy said they didn't have a load?) , and insulation estimates.
The sales guy, and lead installer were adament that a 5 ton was the way to go.
I'm worried that if I go with the 5 ton, I will experience the short cycling humidity issue you folks keep speaking of. Do you think this would be possible with the bigger unit? How much bigger/oversized does an airconditioner have to be to cause problems?