I have a >2000 square foot home in FL. I took out a 12 year old 3 1/2 ton heat pump and had a 16 SEER Carrier Infinity System installed. It is model 25hpa648 with the matching airhandler (sorry dont have the model number with me right now) and infinity control inside. My first months electric bill came and the daily kWh average jumped from 56 before the unit was install to 60. Ok, I figured since the old was was still on the bill for 7 days, I would wait another month. Just got my new bill and average daily kWh is 59. The home was unoccupied for one week during the first bill and one week during the second bill so no computers, tv's, oven etc. Installer checked system out 2 times and found no problems. They want to wait another month to see what happens!
Static pressure is high, just like it was when unit was installed. And air handler has condensation built up on it. Installer enlarged air return chase and enlarged on of 3 air returns in home. They also came back and ran flex duct from plenum to boxes further back into roof. Any thoughts as to why energy consumption would not be reduced more with this new system?