Heat Hump or A/C
We have decided on the Carrier 58CVA090-16 furnace and have the option of either the 24ANB736 a/c or the 25HNB736 heat pump. The heat pump will cost $700 more than the a/c. The saleman gave ua a operating cost estimate that showed significant savings with the heat pump, but the gas cost was estimated wrong, at $1.70/thrm. Over the past year our gas bills ranged from $.96/thrm to $1.39/thrm. Our electric is $.12/kWh on avg. I am thinking of just staying with the a/c if the savings won't be that substantial. We have two units and our upstairs unit is still working so I am trying to envision savings when the heat pump with only be used on 2/3 of the living area. This system is for approx 2,900 of living area (main level and finished basement). We could stay in this house another 10-15 years, we have no current plans to move before then. Any suggestions on which to go with?
Also, we have the option to instal a carrier LFP1418 humidifier for $600. He talked about the technology being different now (we have a 14 yr old Honeywell by-pass humidifier.) Is this a good price?
Lastly, the furnace that everyone has suggested for us is 90,000 BTU. We are replacing a 70,000 BTU furnace. Both 80% eff. This salesman said that he was bumping up to 90,000 so the system didn't have to work as hard. Is this a proper recomendation?