I had an 11 year old Goodwin that died last year. I think it was a 4(or5) ton. When the new installers came they said that I needed a 5 ton. I had some come and tell me that I need a 4 and others that said a 5. They all did the measurements around the house, added the window thickness and that the temp that I like to keep the house at (I need it cold due to a head injury). The company I choose swore that I had to go with the 5 ton variable unit. So I did.
My house is 1832 sq ft. I live in Arizona so it gets very hot. With my old unit I used to keep the house set at 74 during the day and 68 at night. Since installing the new unit I've had to keep the house at 72 during the day and I still keep it at 68 at night. I asked the company why I had to lower the temp with this new system and they just said that it happens but I'll be saving money anyway with this new HE system.
It's almost a year later and when I compared my bills from 2010 & 2011 on the APS website it shows that I'm paying more since using this new system.
I thought I was supposed to save money when switching to a HE unit.
Why would this be? Could the unit be too big for my house? Should I get the 4 ton?
Thank you for your help.