It's been almost 15 years and our furnace is on it's last breath, so it needs to be replace.
My problem: 15 years and a heck of a lot has changed! Back then units were just bought by their tonnage and you turned it on and the thermostat kept it in a comfortable range. Now there's so many changes it's hard to grasp it all.
What can you recommend to read to understand the new changes to see what's a good value for my residence? Some new brands are on the market, so don't know how good they are (know of Carrier/Trane/Lennox and Tempstar), or even all these new fangled options truly offer.
We live in the hot and humid state of Georgia, have a 1500sf home (one story) currently with a 3 ton unit (Tempstar). My mom's retired now and stays home a lot so the unit has to keep the home comfortable for she's elderly. And do the thermastats now require a rocket science degree to use (mom's not getting any younger to use them)?
So can someone offer a head's up on the changes and how much better they are -- I read now folks judge by noise and even finish (that is something, considering it wasn't much of an option before). So what should I really look for in a unit other than tonnage?
Ack! So many questions I hope some of you HVAC guys feel like holding class for a n00b. :/