Aha thank you mike_home, it sounds like we want the infinity controller...yes yes quoting $450 and there's a carrier $150 rebate on thermostat. I'll have to ask as I think he's quoting the thermostat with wifi! I appreciate your knowledge and advice!

I am however reading some bad reviews on the infinity touch thermostat! What really makes it that much better than the Edge thermostat? I really am not fascinated with the high tech capabilities., and is it going to save me that much $$$ in short term?

The Infinity 80 will not save you any money over the similar 58CTW that I recommended in a prior post. You just won't have the communicating and diagnostics that the Infinity Furnace offers with the Infinity controller. Improved comfort with Infinity system more so than any dollar savings.

IMO

Thank you tiger dunes and I realize that there're no savings unless compared to our current unit, of course! We will look into the other system you recommended!

Can you point to the bad reviews? I am curious to see what they say.

On Amazon were the negative reviews

The bad reviews seem to be referring to WiFi and the Carrier application.

The 58CTW is a good choice and would be compatible with the Performance AC condenser. It is basically the same furnace as the 58CVA without the features you don't want.

Make sure you being sized correctly.

That sounds great mike_home. Why am I bothering with the Infinity furnace? I should have thought of that.

Several years ago you had to buy the Infinity furnace if you wanted a variable speed multi-stage furnace. Now the Performance models have many of these features. There seems to be a lot of overlap in the Carrier models. The 58CVA is an old model that Carrier seems to be keeping for installations where a condensing furnace is difficult to install.

What is your location? What size is your home? What size is your existing furnace?

Post back.

IMO

Tiger dunes...ne Ohio just under 2,400 two story colonial, presently a carrier 110,000 btu 23 years old...builder installed.

Just checking...I agree about the furnace sizing...even at 80% eff, you are going to see some good savings versus old furnace. What size AC is existing?

IMO

The AC IS A Heat/cool pump 2.5 ton but we have disconnected heat pump...useless and $$$ I think 36,000 btu...we've been milking it and on borrowed time with it hence the replacement.

So what will be missing going with Carrier Performance furnace vs Infinity? I'm also curious of cost difference,,,will have to check that out

You have nat gas or propane? Do you know your electric rate?

IMO

Natural gas. Electric rate is 0.72423 kWh if I'm reading it right

Oops looks like 7.70 per kwh

Cheap electric if all inclusive. If you give me your nat gas rate/therm, I will run a fuel comparison for you.

IMO

Unfortunately I don't have a gas bill to look at for my rate..we toss them monthly hoping to get one soon

Ok our gas rate is very high at 5.99 mdf...I'm going to call to negotiate today as I'm getting offers for 3.34-3.78...

Who is your nat gas and electric utility carriers?

Ok I already negotiated to 3.37 mdf :)

WOW....very cheap nat gas....no cost leverage at all with a HP....do you mind sharing your carriers?...and the rates you provided is an all inclusive delivered rate both electric and nat gas?

Dominion Energy Solutions for gas and First Energy Solutions (Nopec) ...I'm guilty of not overseeing this better

Yes our gas is low now but yes as far as I know those are all inclusive rates. What does "no cost leverage at all with a HP" mean?

The gas rate includes delivery from supplier to our gas company but does not include our gas company charges..I'll have to call them for that. Also government taxes :/

Ok now I called our gas company..they charge .44 per mcf for service charges and transport of gas added to supplier rate of 3.37 for a total of 3.81 per mcf

You want the all inclusive rate delivered to your home...both electric and nat gas...

So finally, all inclusive rates are 7.70 kWh electric and 3.81 mcf gas

With those rates, there is no operating cost leverage for using a HP versus nat gas even in the shoulder mths. Simply not there.

IMO

Ok we weren't going to purchase a heat pump anyway as it was the better option 23 years ago but not now.

The better informed you are, the higher chance of making a good decision. And just so you know, HPs have made great leaps and bounds over the past 10 yrs compared to your model.

IMO

Thank you tiger dunes! Yes, I have more knowledge than ever on heating and cooling and yes, I like to make an informed decision. I appreciate your help

It would be good to know what Mdl evap coil dealer quoted...

IMO

Oh no does that matter? The coil is CNPVP3617ALA

Yes it matters as far as performance/eff numbers for the AC....I will look up the AHRI matching number...and post back...

IMO

Our AC is Carrier 24ACC636, 16 Seer and AHRI Matchup is 6390031, if that helps

And we have changed to 70,000 btu furnace as the only contractor who did a load calc said 90,000 was too much and as it has a 4 ton motor and our AC is 3 ton and load calc comes up with 70k...he guarantees that will satisfy our needs

Be careful here. Those are input numbers. a 90 K at 80% yields 72 KBTUs, a 70 K at 80% yields 56 KBTUs. 2400 sq ft home. I think 90 is the correct size based on your location and size of your home. Dealer should support his opinion with a written load calculation at your design temps in/out for heating.

IMO

Ugh...his layman explanation is the carrier infinity 80% 90,000 btu has a 4 ton motor/blower and AC IS 3 ton...the blower will be very loud with that size motor...our square footage is actually 2300 if that matters. Ugh today is contract day and we don't know what to do. Is a 4 ton furnace motor/blower a problem with 3 ton AC? Our current AC is 2.5 and it's been fine

A bigger motor is not a problem. It can be set to a slower speed to accommodate the 3 ton condenser.

Ohio can get very severe winter lows. I would be skeptical about a 70K BTU furnace.

Aha, thank you for confirming my thoughts and my research! I've since learned a 4 ton can be adjusted to correct speed eg 3 ton...I dont understand his thinking as he's giving me same price whether 70,000 btu or 90,000 btu. And yes we've had some very frigid winters the last few years. Thank you for saving my day tiger dunes and mime_home!!

Ask dealer for matching AHRI number. The number you listed is not correct.

TD

Could it be 6390030?

No this shows the Infinity 80 furnace, not the Preferred 58CTW....also poor coil selection...

I'm confused, we are getting the Carrier Infinity 58CVA090-1-16 furnace and Performance AC 24ACC636 with CNPVP3617ALA coil...so we need a better coil? Is there a big price difference for another coil??

I am done here. I thought you were moving over to the 58 CTW Performance furnace. Good Luck! You may need it with that furnace size recommendation.

IMO

Tiger dunes I'm sorry I have not committed either furnace at the moment but leaning toward the infinity...I apologize for the confusion and you've been great help to me! I appreciate your time and effort, truly!

And we are definitely getting 90,000 btu