Maybe someone can explain how I got three different quotes on which size system. Background in Dallas Texas, 2800 square foot 1 story house with 10 foot ceilings and lots of windows facing north and south. My equipment right now is 10 year goodman with a 3 ton and 2 ton system.
1) Quote 1 from a trane authorized rep go with a 4 ton and 3 ton xl20i
2) quote 2 from another authorized rep go with a 3 ton and 2 ton xl20i
3) quote 3 from independent go with two 3 ton and Lennox XC21 which was 30% percent cheaper than tranes.
They all measured and took about 1 hour to do the calc. Funny thing nobody had a computer they all did it on paper but did not show me their report.
Any suggestions would be appreciated. I am also willing to buy the software myself and attempt to do the calculations.