About 3-1/2 years ago, we replaced a furnace that was way too big and blew like a gale with a better sized Bryant HVAC system. We also added solar at about the same time. There was a rebate to go to higher efficiency that was bigger than the cost of upgrading, so that was a no-brainer. It has an DC fan, so it draws minimal current when running, so during the summer, we have continuous circulation, which helps even out the house temperature, and filters the air. We have a couple of rooms that get hot in the afternoon, and each has room for another vent. That'll help keep the kitchen, and the living room cool.
My YF has severe allergies, so the continuous running fan helps keep the air clean, and reduces her dependence on Zyrtec.
We also moved the HVAC from the furnace closet to the attic, which opened up a closet for more storage.
Shortly after we put the HVAC in, we had solar installed. I wanted just to do peak shedding, but the salesman convinced us to try to replace our entire electricity usage. So, I don't know how much the new heater saved us, nor the A/C is costing us, but the reduction in gas and electricity costs for heating alone more than pays the interest for solar plus the new HVAC HELOC loan.
Used to be, you only really needed A/C for a couple weeks each August, but it's gotten hotter here. Probably because all the trees and grass have been paved over for roads, parking lots, and new buildings. Think Apple, Google, Microsoft, and Facebook.
