Hello, all- I'll warn you in advance that this is a little long. Hard to sacrifice accuracy for brevity. I could really use some 2nd opinions from the experts willing to read this!
Thanks to a wealth of info here I've narrowed down my choices considerably. I would very much welcome a few 2nd opinions before I commit to some big $$. I'd like to make sure I am getting more than just different color equipment should I commit to a 5 figure check! But first, some background:
My home is a +/- 2800 sf colonial located about an hour N of NYC. It's got 9' ceilings downstairs and an open foyer. I use about 850 gals annually of oil inclusive of a Bock oil fired water heater. I "guesstimate" my HVAC electric usage at about $1400/year. Thus, with oil at $4.75/gal I spend about $5500/year for oil & elec to heat/cool my home.
Only one dealer, a Carrier one, would do a heat calc. so far. Nobody wants to do them it seems or prefers to guess. He estimates a max heating load of 69000 Btu and 56,000 for cooling. You can see why he feels the Williamson is way too big.
Williamson WHBO-12A oil burner- forced air. 140K BTU input using a 1 gal per hour nozzle. Per the Mfgr I cannot install a smaller nozzle even though a few contractors suggested such, as all feel the system is oversized. 9 years old
Lennox HP-29 5 ton heat pump set to "changeover" at 45 degrees. Lennox tells me it can go lower, to about 25 or so. Also 9 years old. 7.2 HSPF, 10.7 SEER with with high/low cops of about 2.9 and 2.18 respectively.
Carrier Infinity 25HNA960 A 30 5 ton, 2 stage heat pump. About 14-15 SEER for a 5 ton unit, 9 HSPF and high/low cops of 3.38 and 2.6.
Carrier 58VMR120-20 oil burning furnace rated at 83% AFUE
The Carrier dealer estimates I'd use a total of about 450 gals per year in total with this, as he feels my Williamson is very oversized. If he is right, I would use about 400 gals LESS, or 400 in total.
The same Carrier Infinity 25HNA960 A 30 5 ton, 2 stage heat pump. About 14-15 SEER for a 5 ton unit, 9 HSPF and high/low cops of 3.38 and 2.6.
Carrier 58MVC100-20 propane burning furnace. 95% AFUE
Total estimated propane use: 460 gals including hot water (280 without) even though I don't yet have a propane water heater & would need a propane tank.
Lennox XP14 single stage heat pump 15 SEER, 9 HSPF
Lennox 023V Oil furnace
I am not impressed with this quote as they say I "don't need a 2 stage HP since the air handler could meter the air. I told him this sounded like running your car flat out at all times & using your brakes alone to vary speed. Didn't seem like a good idea.... Also, this guy didn't think he needed a heat calc & wanted to go by square footage alone.
Do nothing except lower the changeover point on the old Lennox to, say, 25 from 45 and leave the Williamson oversized.
So, what does the collective wisdom here say or think? Sorry for the length, but for those that do slog through all this BS I am most appreciative. The Carrier guy seems straight, but like the others, light on work and looking for more. They are all hurting, it seems. I don't mind layout out the $$ if I'll see a real payback within, say 5 years or so.