I will let you guys know what the local contractors recomend, in the next week or two. Again Thank you for the help.
If you had an IAQ stat. I'd set the heat pump lock out to 25 and teh furnace lock out to 30, and use balance point plus 2° droop. To allow the heat pump to run during the day when its 25 outside, but have the furnace take over when it lost 2 degrees at night time.
Carrier Greenspeed might work like that. Its a modulating heat pump. So you could get a 3 ton if your A/C load is only 2 tons, or 4 ton if your A/C load is 3 tons.
have you considered a single stage 95% efficient furnace with a high efficent (x13) motor .or a two stage furnace with a varible speed motor then when and if you wanted you could go to a two stage heat pump
#2 @ 80% costs you $35 ? million BTUs, Porpane @ 90% costs you $27 / million BTUs
400 gal;lons are 54 million BTUs with $5 savings $ saves you $270
What would you spend to save $270 ?
Don't know where you live but your heat bill sounds pretty good to me
GAs or propane short cycling is not as bad (inefficient) as oil, short cycling Might be a factor or Hot water or air system, or domestic hot water is ?
Whoops, Faulty Math...That's $7 times 54 or a little less than $400 savings
Gotta stop doing the math on the back of an evelope
Talking about envelopes, any opportunity to improve insulation or better to "tighten up" your home?
Have you done a blower door test to give you an idea of how much infiltration you have now?
Yes I plan to add more insulation in the attic and look at some other things I can do. Being an older home there is prob lots of room for improvement.