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  1. The differentials are supposed to tell the units...

    The differentials are supposed to tell the units what to do example. With a 2 stage heat pump and a 2 stage gas furnace.

    The differentials would call for 1 stage of heat or cooling then if its...
  2. Thanks for the replies, Maybe our therms are...

    Thanks for the replies,

    Maybe our therms are different but if you go under installer settings and scroll down to the bottom of the list you may come across something that looks like this

    stg...
  3. I actually got the G71's for free on a mixup when...

    I actually got the G71's for free on a mixup when I bought the house it was supposed to be the G61's but they installed the 71's by mistake so their mistake hooked me up.


    Actually I was...
  4. Ken or Jim Im kind of in the same boat, I have...

    Ken or Jim

    Im kind of in the same boat, I have 2 G71's and 2 XP16's, and my 2 dealers don' have a clue either.



    I have the 7000's as well what do you have your Diff's set at. If you don't...
  5. lennox 7000 differentials for dual fuel/HP Need help bad....

    I had 2 different lennox dealers come out and set the settings on my Thermostats. Each time they changed a different setting and they both were like Yep this is what you need but, could not explain...
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    As far as the dip switches go, The second dealer...

    As far as the dip switches go, The second dealer came out and set them up.

    The links being cut I was just reading the manual so the first 2 on the board, I can read into 2 stage compressor and...
  7. Replies
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    I had some issues with my g71 setup. If you...

    I had some issues with my g71 setup. If you google g71 manual you can find the service manual for reference.

    You can have the furnace set up to run in 3 stages not sure of the exact numbers but...
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    well I had a premier dealer out here to set it up...

    well I had a premier dealer out here to set it up after the initial installers also a premier dealer did not have any of the dip switches set up correctly.

    So I have the install manual and went...
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    Comfortsense 7000

    Comfortsense 7000
  10. Replies
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    985

    CS 7000 Thermastat and Im reading it from the...

    CS 7000 Thermastat and Im reading it from the Furnace panel.
  11. Replies
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    985

    They did set up the temp diffs. Comfortsense...

    They did set up the temp diffs.

    Comfortsense 7000

    This is what they set it up as.

    Low Balance point 25* (my question on this one if the thermestat is reading 24* from the unit shouldn't it...
  12. Replies
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    985

    Need Some Help Lennox xp16's and G71's

    Ok, I will try to make this short and to the point. Built a new House spray foam, Anderson windows and 2500 Sq ft 1200 up 1200 down roughly. I had to have a premier dealer come and set them up...
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    802

    I actually had messed up all the measurements. I...

    I actually had messed up all the measurements. I just got back and re measured.

    Return 20x10
    output 20x16 First floor


    second floor

    return 11.5x14
    output 15x15
  14. Replies
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    802

    return and feed size duct?

    I have a quick question for you guys. In the process of building a new home. 2 story home rougly 2500 square feet. I have 2 2 ton lennox xp 16 Hp's going in and 2 g71 furnaces as well. Here is my...
  15. Replies
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    This problem might not be a problem at all like...

    This problem might not be a problem at all like you have said. If the house is built properly then it should be tight. I need some source of fresh air. The ERV handles that for me. Then I...
  16. Replies
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    Yes the house has an ERV. Yes the h20 and...

    Yes the house has an ERV. Yes the h20 and furnace are all direct vent. Cracking a window does seem very simple but when its 2 degrees out side not really on the efficient side of things.
  17. Replies
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    im more worried about the dryer, I was told it...

    im more worried about the dryer, I was told it is acouple 100 cfm during each cycle
  18. Replies
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    1,921

    anybody else???

    anybody else???
  19. Replies
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    ari rating website

    hey guys quick ? when using the ari's website to determine efficiency. Is the only thing I need to know the coil and outdoor unit on a heat pump?
  20. Replies
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    No the basement is not being conditioned by a...

    No the basement is not being conditioned by a third unit. It will run off the first floor unit.
  21. Replies
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    564

    heat pump sizing ?

    I had an energystar,leeds hvac designer run a manual J on my home. He came out with 1.5 ton unit for the upstairs and 2 ton unit for the downstairs. He stated once the basement was finished that...
  22. Replies
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    1,921

    My concern with just letting it dump into the...

    My concern with just letting it dump into the basement. Is that the basement is finished and you would not want to dump hot humid summer air in.
  23. Replies
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    passive make up air vent

    I have a question for you pros, building a tight house, at least it should be. With that being said, We have designed the HVAC and going to have and ERV but with that being said. If we where to...
  24. Replies
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    I asked him about resizing the AC system because...

    I asked him about resizing the AC system because I had changed from BATT insulation to Spray foam and asked about downsizing the units and he said that there was no need for it. I am having a manual...
  25. Replies
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    I am not doing this, the builder has his HVAC...

    I am not doing this, the builder has his HVAC contractor doing the work. I just want to make sure I am educated when I talk to him. I don't need him trying to snow me.
  26. Replies
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    will be running two ervs for fresh air, and...

    will be running two ervs for fresh air, and deciding on how to handle make up air.
  27. Replies
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    gas furnace vent ? in a tight house

    Here is a ? question Were building a tight house with spray foam ect. I understand the need for make up air with certain appliances ect. With a Lennox g61V or 71 I understand it vents the exhause...
  28. Replies
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    We are planning on going with the lennox xp16...

    We are planning on going with the lennox xp16 heat pump with the g61v as the backup or if going ac/gas it was the xc16 and the g71

    the xp 16 is upto 17 seer and hspf of 8.7
  29. Replies
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    I must appologize, I am going to go duel fuel if...

    I must appologize, I am going to go duel fuel if I go heat pump
  30. Replies
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    Heat pump advice

    Quick question for you guys. Trying to finally button up this install

    Were building a tight house with spray foam insulation in the St. Louis area, Were split pretty even with the heating and...
  31. Replies
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    thanks for the info, the mini sounds like a great...

    thanks for the info, the mini sounds like a great option. Definitely do not want exhaust in the house
  32. Replies
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    conditioning the garage space?

    I have a quick question. I am in the process of building a new home and the house is going to be sprayed with spray foam and they are going to do the garage for me. I was thinking of maybe having 2...
  33. Thread: Hrv Erv ?

    by acnoob1
    Replies
    23
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    1,766

    yes a 3rd party uninvolved with this.

    yes a 3rd party uninvolved with this.
  34. Thread: Hrv Erv ?

    by acnoob1
    Replies
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    1,766

    The first to second is not really open just the...

    The first to second is not really open just the stair case that goes from 1st to second
  35. Thread: Hrv Erv ?

    by acnoob1
    Replies
    23
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    1,766

    I think they fudged the numbers quite a bit and...

    I think they fudged the numbers quite a bit and that was part of the deal I could have a manual J done by a 3rd party to see what they came out with. I have a fealing that I could get by with 2 2ton...
  36. Thread: Hrv Erv ?

    by acnoob1
    Replies
    23
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    1,766

    carnak Thanks for adding your info here as...

    carnak

    Thanks for adding your info here as well. The more the better usually

    Just a quick update for you and maybe you can add some info

    New Construction home 2500 sq ft, 2 story. Spray...
  37. Thread: Hrv Erv ?

    by acnoob1
    Replies
    23
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    1,766

    TB, Thanks for the info, now that my head is...

    TB,

    Thanks for the info, now that my head is spinning

    So let me try to take this from the top.

    Since Im going to be using a spray foam with good windows, The house should be if done...
  38. Thread: Hrv Erv ?

    by acnoob1
    Replies
    23
    Views
    1,766

    TB, So, here is question. If I have the...

    TB, So, here is question. If I have the contractor run the exhaust vents outside the house via the roof or a wall and add some time up make up air setup to the hvac system. Would this work. Or...
  39. Thread: Hrv Erv ?

    by acnoob1
    Replies
    23
    Views
    1,766

    i wanted to go erv but was told since we were in...

    i wanted to go erv but was told since we were in the middle the HRV would be better suited. But like you I want as much of the humidity gone in the summer, That is why im here trying to figure...
  40. Thread: Hrv Erv ?

    by acnoob1
    Replies
    23
    Views
    1,766

    Well I was debating the fact. We are right on...

    Well I was debating the fact. We are right on the bubble of HRV/ERV. I was looking at the Fantech HRV/ERV's from what I was told I can by the ERV Core and in the summer time change it then when...
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    Hijacked already. Well Im learning on the fly...

    Hijacked already.

    Well Im learning on the fly here. They specd out the house for a 2.5 ton xp16 The lennox rep said they made it but, checked the brochures and they do not list .5 ton sizes. So...
  42. Thread: Hrv Erv ?

    by acnoob1
    Replies
    23
    Views
    1,766

    I live right out side of St. Louis MO. I'm...

    I live right out side of St. Louis MO.

    I'm thinking this is going to be a balance setup. What ever comes in goes out.
  43. Replies
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    Lennox component ?'s

    I have a question for you lennox guys. We are in the process of building a new construction home and want to make sure I get the right stuff the first time.

    We are going with a

    2.5 ton...
  44. Thread: Hrv Erv ?

    by acnoob1
    Replies
    23
    Views
    1,766

    Hrv Erv ?

    Im in the process of building a new house

    2 story 2500 sq ft.

    We are using spray foam insulation and it is set up with a 2 heat pumps and 2 back up furnace one for upstairs one for down stairs....
  45. Replies
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    I am getting ready to pull the trigger here and...

    I am getting ready to pull the trigger here and still need some advice about my manual J calculation. The only that I am going to change is that I am going with spray foam insulation. Any help on...
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    I used .5 and 1.2 winter that was "average" it...

    I used .5 and 1.2 winter that was "average" it said
  47. Replies
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    Thank you guys for your responses. I will try to...

    Thank you guys for your responses. I will try to put this as easy as possible.


    Contractor has 2.5 ton and a 75k furnace up stairs and a 2 ton 45 furnace downstairs. Im looking to upgrade my...
  48. Replies
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    1,187

    hvac calc ? seems to low

    I purchased the HVAC calculator and I seem to have a problem the my loads do not seem to add up. If anybody has a good grasp of the program and wants to due a quick calc. It would be appreciated. ...
  49. Replies
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    I understand the policy I was trying to find out...

    I understand the policy I was trying to find out just the equipment price, To make a better informed decision whether the upgrade is justifiable.
  50. Replies
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    Well here goes, Im building a new house. They...

    Well here goes, Im building a new house. They use the bottom line Lennox AC/furnace. I was given by a local dealer there cost of the ACD13 3 ton. I am going to upgrade to either a heat pump xp16...
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