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  1. Since he has two systems, swapping the...

    Since he has two systems, swapping the controllers should move the problem to the other system if you are right.
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    Sounds like your system is way oversized for your...

    Sounds like your system is way oversized for your duct system. What was the size of the old furnance? Did he do a manual J.
    When we got our Infinity we went smaller based on manual J.

    While in...
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    I have the AprilAire 2400 series and it has...

    I have the AprilAire 2400 series and it has barely a performance effect on the Infinity.
    I have two systems one with a two stage AC and one with a one stage AC and prefer the two stage AC because it...
  4. I looked into these but decided against them...

    I looked into these but decided against them because it is my understanding that the only way to interface with them is through the Carrier Website portal. Plus they charge a fee for that. Unless you...
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    On ours is it days of usage for EAC and for Media...

    On ours is it days of usage for EAC and for Media no option so it makes me believe that is just static only.

    The static settings works real well, just noticed that mine said change filter and I...
  6. Many of the Carrier tech doc's can be found on...

    Many of the Carrier tech doc's can be found on their ftp site, sometimes hard to find due to the naming convention.

    http://www.docs.hvacpartners.com/idc/groups/public/documents/techlit/
  7. Yes it does and placement of the AC is important...

    Yes it does and placement of the AC is important and as an alternative Carrier provides a OAT sensor.

    http://hvac-talk.com/vbb/showthread.php?t=314872
  8. Stat measures indoor temp and humidity, Outdoor...

    Stat measures indoor temp and humidity, Outdoor unit measures outside temp. With a humidifier hooked up it will take into account outside temp so you don't get condensation. I.e it will never hit...
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    Since your are in NVa look at Check Book...

    Since your are in NVa look at Check Book magazine. It rates many different businesses in the DC area. Should be available in your local library. Our HVAC contractor from Mont. County is listed. Have...
  10. With the right stat ( like Infinity) it will tell...

    With the right stat ( like Infinity) it will tell you to change the filter when it is dirty based on the increased static.

    Another advantage is multiple speeds for the fan only function, which...
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    More complicated since the system can adjust the...

    More complicated since the system can adjust the blower motor all the time based on requested temp and humidity and achieved temp and humidity. So it depends when in the cooling cycle you look at the...
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    Dip switches ignored with Infinity controller,...

    Dip switches ignored with Infinity controller, however there are advanced programmable settings that change the way the system operate. Forget all of them, but like Utility savings, Comfort and off...
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    Thank you, one another thing I noticed is that my...

    Thank you, one another thing I noticed is that my system is more sensitive to the manual damper settings i.e. change over between cooling/heating. So just by moving his damper settings if he has...
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    Being in the DC area with a Evolution system I...

    Being in the DC area with a Evolution system I can tell you that the weather has been significantly warmer than last year. So don't expect to see a decrease in power use for this year.

    For...
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    Get the Infinity Stat for you comfort and also...

    Get the Infinity Stat for you comfort and also have them justify the breaker change. Never upgrade a breaker if the wires can't handle it. Btw the 25HPA536 max breaker size is 35 Amp and Minimum 25...
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    Rebate will be back this April. Also do you...

    Rebate will be back this April. Also do you really need a 100K Furnace. Did they do a calc on the furnace too or just the AC. Small investment in the building envelope can reduce the size of the...
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    Do a manual J or have the contractor do it, but...

    Do a manual J or have the contractor do it, but if the original unit was 3 ton, than a 3 ton two stage unit w/VS should do the job. It will control the humidity real well and will get rid of any hot...
  18. Replies
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    Being in the same DC area I would recommend going...

    Being in the same DC area I would recommend going with a Infinity. Do a manual J, I went from a 3.5 to 3 without any problem. Because of the better Humidty control can keep the stat at a higher temp....
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    According to Carrier it is a 13 when used with...

    According to Carrier it is a 13 when used with the 48 Outdoor unit

    http://www.xpedio.carrier.com/idc/groups/public/documents/techlit/ss-ph13-04.pdf page 10

    So if anything the Airhandler is...
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    Actually the lower stage is slightly more...

    Actually the lower stage is slightly more efficient because the secondary heat exchanger is able to get more btu's out of the burnt fuel ( larger area). But as we all agree the whole system including...
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    I am in MD and have both systems ( 2 zones), One...

    I am in MD and have both systems ( 2 zones), One Infinity furnace with a 1 stage Performace and one Bryant Evolution with the 2 stage 16 Evolution. Prefer the 100 % Evolution over the Infinity with...
  22. Replies
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    There is a big difference in the type of...

    There is a big difference in the type of combustion in an industrial furnace for melting metal compared to a hot air furnace in residential applications.

    For heat transfer in high temperature...
  23. Replies
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    Flame temp does not necesarly equate to heat...

    Flame temp does not necesarly equate to heat generated. The volume of the combustion chamber does not change between high and low fire and hence the temperature of the flame does change. My first...
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    Or the one's that send money to Nigerians in...

    Or the one's that send money to Nigerians in escrow, it must be profitable otherwise they wouldn't waste their time :eek2:
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    Actually the numbers posted were from Jan. 2008....

    Actually the numbers posted were from Jan. 2008.

    Only know the BTU values after I get the gas bill and then it is still an average for the month, however the variation of the conversion factor...
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    Not sure if this was addressed to me, but since I...

    Not sure if this was addressed to me, but since I posted calc's in this thread,

    Did time the meter at that time, not just one time, but several times:

    36 sec for 1/2 cuft. So .5/36*60*60 = 50...
  27. Replies
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    You must be a disciple of Mr. Davis. An efficient...

    You must be a disciple of Mr. Davis. An efficient Heat Exchanger has to do with the amount of energy transfered, not the temperature.

    The Inifity/Evolution systems have a comfort settings which...
  28. Replies
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    First of all the heat in a hot air furnace is not...

    First of all the heat in a hot air furnace is not transfered from flame to heat exchanger, but combution to combution gasses and then heat exchanger to air. Flame never touches the heat exchanger....
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    Understand that, however are you still a PRO if...

    Understand that, however are you still a PRO if you utter non-sense like this:

    "
    Question 2: Where do the BTU's go?

    Answer: Natural gas has a maximum flame temperature of about 3600 degrees...
  30. Replies
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    But no access to those Pro forums. :nopity:

    But no access to those Pro forums. :nopity:
  31. Replies
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    Pretty sure it calculates static pressure based...

    Pretty sure it calculates static pressure based on current draw for a given RPM, which equates to CFM. No Pitot tube in the furnace and we know how accurate those can be (Airbus).
  32. Replies
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    Yep :patriot: but since you didn't call him out I...

    Yep :patriot: but since you didn't call him out I did it for you. You are about the only one with Pro Status questioning him.
  33. Replies
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    Well Mr. Davis does believe that a furnace does...

    Well Mr. Davis does believe that a furnace does not deliver what it advertises, actually only 50% of that (post 254) Earlier he asked for field measurements I gave them and he changes the subject to...
  34. Replies
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    Rise measured myself. Evolution will give you the...

    Rise measured myself. Evolution will give you the CFM's
  35. Replies
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    The other A/C you might consider is the 187A, I...

    The other A/C you might consider is the 187A, I have that one and has better stagging but a lower efficiency. It is not a scroll compressor.
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    Airflow was from the Infinity Stat, clocked the...

    Airflow was from the Infinity Stat, clocked the meter and got the btu from the bill. There can be errors in my calc's but they would apply to both the high and low stage.

    You were saying earlier...
  37. Replies
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    Used one of those Radio Shack indoor/outdoor...

    Used one of those Radio Shack indoor/outdoor units ( no longer needed since I have the Evolution) with the outdoor sensor hanging in the middle of the duct. Remember playing with the comfort settings...
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    Evolution will control the humidifier including...

    Evolution will control the humidifier including measuring the outside temp and adjust the inside accordingly, so never have to manually adjust it. I have a smilair setup. Would recommend getting the...
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    I am in suburban Md and went through the same...

    I am in suburban Md and went through the same Analysis. Went with the 95%furnace because of a bad experience with a Heat Pump in my previous house, probably should have gone with the Heat pump and...
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    Post #257 in this thread. He is saying that a...

    Post #257 in this thread.

    He is saying that a lower flame temperature can be the result of less efficient combution hence his statement of a lower efficiency. I repute that by saying that it is...
  41. Replies
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    I repsonded to this and quoted it: "Question...

    I repsonded to this and quoted it:

    "Question 2: Where do the BTU's go?

    Answer: Natural gas has a maximum flame temperature of about 3600 degrees when it is burned completely with 20.9% Oxygen....
  42. Replies
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    I have the older 2 stage. Measured the Inlet...

    I have the older 2 stage. Measured the Inlet temperature before my filter and the Discharge after the AC coil and also at some close by registers. Also measured the gas usage by timing the gas meter,...
  43. Replies
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    As a Mechanical Engineer by training, but not...

    As a Mechanical Engineer by training, but not practicing, I have to respond to the data presented here:

    The adiabatic flame temperature of natural gas, burned with the chemically correct, or...
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    They did that when my house was build and the...

    They did that when my house was build and the second winter the french floor drain backed up because the soil frooze and the water had no where to go. Had them redo it with a condensate pump and into...
  45. With our system we don't even run the fan, leave...

    With our system we don't even run the fan, leave it on auto and I have found the Infinity does a good job keeping all rooms at an even temp. Specially if you have a 2-stage outside unit.
  46. Replies
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    Thanks, does it require any specific version of...

    Thanks, does it require any specific version of the controller like the -B version? In addition does it require any subscription with Carrier to remotely control the unit?
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    Infinity/Evolution Broadband Access

    At the time we installed our Evolution system (2007) I was told that Carrier was ready to release a Wifi and/or Ethernet module. Last time I checked with our installer it was not yet released....
  48. Furnace doesn't measure humidity so it will not...

    Furnace doesn't measure humidity so it will not make any adjustments based on current humidity. Newer Performance supports Inifity controller better than the older one's.

    I have two systems, one a...
  49. Replies
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    I had a similair setup in an addition and guess...

    I had a similair setup in an addition and guess the contractor cheaped out and did not install the Infinity Thermostat. Had problems with the upstairs not being as cold in the hot weather as the...
  50. When they installed our Evolution System 2 years...

    When they installed our Evolution System 2 years ago, the controller came with an OAT Sensor. When I questioned them about it they said it is included for scenarios like yours. So I gues you have to...
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