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  1. Replies
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    750

    Just an update, ended up choosing the following...

    Just an update, ended up choosing the following equipment:
    - EL296V 2-stage 96% ECM furnace
    - XP16 2-stage Heat Pump
    - iComfort t-stat (wifi version)
    - aprilaire 600 bypass humidifier
    - HRV...
  2. Replies
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    750

    There are not many if any contractors around here...

    There are not many if any contractors around here that have expertise with that setup and they charge and arm and leg if you even bring it up. I think most everyone on here is familiar with what you...
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    750

    with the only flue being the water heater, I'm...

    with the only flue being the water heater, I'm hoping that infiltration isn't a problem. We hit temps over 105F and below -5F. I went with the 95% furnace almost exclusively to help control the...
  4. Replies
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    750

    What kind of blower door test numbers would...

    What kind of blower door test numbers would indicate the need for HRV/ERV? Which would be better suited for my climate? Maybe I do need one.
  5. Replies
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    750

    I don't think our budget would allow for split...

    I don't think our budget would allow for split units. I think that is a several thousand $ adder. That does seem preferable though.

    As for ventilation there are no plans for anything extra. ...
  6. Replies
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    750

    New House Build - HVAC Choices...

    Been a long time since I have been on this forum. I'm getting ready to build a new house as follows:
    - 2-story, south facing (Kansas City)
    - 2300 sq ft total on upper two levels
    - 1200 sq ft...
  7. Options for 80% NG Furnace Comfort Improvement...

    I have an 80% NG furnace in an unfinished part of my basement. It is up against a wall it shares with the garage and directly across from it is an exterior wall. To the left side is a foundation...
  8. Since no one else has stated the obvious, I guess...

    Since no one else has stated the obvious, I guess I will...

    Those pictures don't really mean much in regards to the life of the filter. The only way to truly know if the filters are at the end is...
  9. Thread: wire size

    by badtlc
    Replies
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    2,886

    He may be a master electrician but #6 is the...

    He may be a master electrician but #6 is the absolute most conservative choice and overkill. The code allows #8 for 55A as long as the breaker terminals, equipment terminals and insulation all meet...
  10. Thread: wire size

    by badtlc
    Replies
    19
    Views
    2,886

    That is only if both the terminals on the breaker...

    That is only if both the terminals on the breaker and equipment are 90C rated.

    #8 AWG is OK if all the requirements are met (assuming 52A load/min circ rating). The terminals need to be 90C rated...
  11. Replies
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    2,117

    I have a muffler on my discharge line on my heat...

    I have a muffler on my discharge line on my heat pump due to high frequency resonant vibration noise coming off of my heat pump lineset in heating mode. I needed it because my contractor clamped the...
  12. Replies
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    14,126

    Another factor to keep in mind if you are looking...

    Another factor to keep in mind if you are looking at long term costs associated with the humidifier, do you want to conserve water or conserve elec or natural gas used to heat the water? If your...
  13. Replies
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    23,920

    If talking about portable generators and...

    If talking about portable generators and temporary connections, the transfer switch is not required, but there are some disconnection requirements.
  14. Replies
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    23,920

    You don't want to switch the ground conductor. ...

    You don't want to switch the ground conductor. That is dangerous.
  15. Replies
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    23,920

    Electronics don't need "clean power." 99% of...

    Electronics don't need "clean power." 99% of electronics are DC and are converting the power using switching power supplies. These types of power supplies don't care what shape the AC power is as...
  16. The t-stat shouldn't be able to lockout the Aux...

    The t-stat shouldn't be able to lockout the Aux heat during defrost if wired properly.
  17. Replies
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    15,391

    It is a pretty simple calculation to determine...

    It is a pretty simple calculation to determine the temperature at which the furnace becomes cheaper to operate than the heat pump. It is more of a utility cost issue than an efficiency issue, but...
  18. Replies
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    15,391

    That is common. Did you ever notice a time when...

    That is common. Did you ever notice a time when your current AC or furnace didn't keep up? Did you ever notice either the AC or Furnace short cycling during extreme temps?

    It is a sad day, but...
  19. Replies
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    15,391

    That is fine, but the economics justify it. ...

    That is fine, but the economics justify it. Personal preference is just that, personal. I'm talking black and white, dollars and cents.
  20. Replies
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    15,391

    Even then, there are months during the year where...

    Even then, there are months during the year where the heat pump is going to more than pay for itself. The colder the climate just means you look at spring and fall for the heat pump payback/savings...
  21. Replies
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    15,391

    You could always take the money you save buying...

    You could always take the money you save buying the 80% and invest it in insulation and infiltration reduction and come out about the same.
  22. Replies
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    15,391

    You apparently stopped reading at the part you...

    You apparently stopped reading at the part you highlighted in red. Don't worry, many people make the same mistake. Even Canada and Alaska have MONTHS of weather above 20F.
  23. It is what it is. If you are asking if that is...

    It is what it is. If you are asking if that is good or bad, that is your call. That is not abnormal. Some people's heat pump are sized such that they can't maintain below 35 degrees. My heat pump...
  24. Replies
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    The only place a heat pump isn't suitable is when...

    The only place a heat pump isn't suitable is when there isn't a heating season. It is never too cold of climate to install a heat pump. Even if a climate gets too cold for the heat pump during...
  25. that is a great tool. wish my t-stat did that.

    that is a great tool. wish my t-stat did that.
  26. It depends on the size of the equipment and...

    It depends on the size of the equipment and setup, but 2-stage scroll compressors can provide an energy efficiency gain in 1st stage.

    For example, my 3-ton 2-stage scroll compressor on my heat...
  27. I had to fix the wiring on my t-stat myself on a...

    I had to fix the wiring on my t-stat myself on a new install. The installing company came out 3 separate times and never once looked at the t-stat wiring as part of the cause. I couldn't afford a...
  28. Replies
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    to get the most, you need a quality programmable...

    to get the most, you need a quality programmable t-stat that allows you to lockout the aux heat strips and has good, predictive recovery programming. Then....

    1) Find out what setbacks you want...
  29. this really sounds more like they got the O...

    this really sounds more like they got the O setting wrong on the t-stat or miswired it.
  30. Replies
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    Sounds like the lineset is strapped down instead...

    Sounds like the lineset is strapped down instead of suspended and isolated from the house structure.
  31. Replies
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    4,182

    Did you see any ice melting during the defrost...

    Did you see any ice melting during the defrost cycle? I don't think the sequence is going to randomly change. Seems more like a reversing valve issue.
  32. once you have an established duty cycle, you can...

    once you have an established duty cycle, you can just take that number in decimal form and multiply it by the actual heat output rating of your furnace and get a number that will be close to your...
  33. Just me speaking here, but I wouldn't go by just...

    Just me speaking here, but I wouldn't go by just your BTU readings/measurements. I would calculate the duty cycle for your furnace. When you hit near 0F, you should be at a duty cycle of 90%+ if...
  34. Replies
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    2,340

    Yes. the service manual for these units are...

    Yes. the service manual for these units are quite clear. It has to be above 60F outside and you have to be running in first stage AC mode to get proper charge.
  35. Replies
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    If your exterior walls are all insulated, you...

    If your exterior walls are all insulated, you don't have doors with drafts and your windows are at least double pane w/ no drafts, I'd consider it fairly modern.

    I find it odd the one guy would...
  36. Replies
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    Yes, they have to come out to get the refrigerant...

    Yes, they have to come out to get the refrigerant charge completely right. It has to be above 60 outside before they can fine tune the charge.
  37. Replies
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    1,243

    If you have a nice, fairly tight modern house,...

    If you have a nice, fairly tight modern house, the 75k sounds reasonable. My house is around 2,000 sq ft, reasonably tight (80% furnace) and it only requires about 40,000 btuh to maintain temps at...
  38. Replies
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    2,340

    I have an Amana ASZ16 3.0ton and it blows warm...

    I have an Amana ASZ16 3.0ton and it blows warm air and maintains my house temps down to about 15 degrees F if i keep the t-stat set at 68 and leave it.
  39. Replies
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    2,842

    I don't necessarily prefer packaged units but I...

    I don't necessarily prefer packaged units but I do like that on the furnace side, you can run an 80% NG furnace in a packaged unit w/out combusting inside air and increasing infiltration. This...
  40. Replies
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    21,628

    It won't pass electrical code because the OCPD...

    It won't pass electrical code because the OCPD wasn't sized properly.
  41. Replies
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    21,628

    if they ran a new circuit to the new disconnect...

    if they ran a new circuit to the new disconnect and heat pump location, in no way can they justify installing #12 awg wire if they were the providers of the heat pump. It is flat out against the...
  42. Replies
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    21,628

    as long as the breaker doesn't trip, there isn't...

    as long as the breaker doesn't trip, there isn't really any safety issue. Odds are, it is going to be really close to tripping during harsh start-ups and the breaker tripping could damage the...
  43. Replies
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    1,860

    I'd be interested to know the price of oil and...

    I'd be interested to know the price of oil and the prices of propane he has available.

    Would the boiler be oil or propane fueled?
  44. So are you stuck with it? Nothing is worse than...

    So are you stuck with it? Nothing is worse than an oversized furnace.
  45. Replies
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    2,710

    Check your utility company. For example in KC,...

    Check your utility company. For example in KC, KCPL will provide a honeywell for free (looks like an IAQ type) to existing customers. It allows KCPL to turn your t-stat down a degree in the summer...
  46. The t-stat isn't going to change anything. How...

    The t-stat isn't going to change anything. How ever much energy it takes to maintain the setpoint is what it is. I'm also assuming the heat pump is running 24/7 during this scenario.
  47. Replies
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    931

    you want as much surface area as possible. 16x25...

    you want as much surface area as possible. 16x25 will serve you better. Get the right type of filter and you'll only have to change it once every 6 months or so.
  48. Personally, I know I'm late in this discussion,...

    Personally, I know I'm late in this discussion, but assuming you can find a quality contractor, I'd go with an 80%, 2-stage variable speed furnace with AC.


    If you are moving in 2 to 3 years,...
  49. Replies
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    958

    Carrier heat pumps, or at least some, have a...

    Carrier heat pumps, or at least some, have a setting to make the defrost transition quieter. Normally, this is disabled. You or your tech could try enabling the quiet defrost mode and see if that...
  50. Replies
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    if you just set it at 70 and leave it, there...

    if you just set it at 70 and leave it, there isn't much else to do. You can change the CPH (cycles per hour) for the compressor to 3 if it isn't already. But since you aren't changing temperatures,...
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