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  1. Replies
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    Sometimes it is, Catman. So far, in my...

    Sometimes it is, Catman.
    So far, in my experience, those times are when it is raining and/or foggy.
    Most of the time it's too short. Especially when it's 45 degrees outside.
    It's about right...
  2. Replies
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    Well, I tried to fire it up this AM before...

    Well, I tried to fire it up this AM before heading out for family Christmas, but I didn't like the fan vibration. Not horrible, but not good either. It was still raining Saturday night when the power...
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    http://www.lansingstatejournal.com/viewart/2013122...

    http://www.lansingstatejournal.com/viewart/20131223/NEWS01/312230025/8-people-hospitalized-after-using-oven-heat-house-Lansing
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    So, if I took off the grids that the pots rest...

    So, if I took off the grids that the pots rest on, they'd burn cleaner because the flames wouldn't hit metal?




    I've gotta think that's for closed garages. Aiming the exhaust outside and...
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    Couldn't post this last night as the generator...

    Couldn't post this last night as the generator died while I was initializing my CO meter, but after 2 hours with the range off and the generator on, I still had 6ppm in the house, but there was 0ppm...
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    My generator cable barely reaches from the...

    My generator cable barely reaches from the breaker box to the garage door.
    Maybe I should have made it longer.

    The generator sits just inside the 16x7 garage door, on the side away from the...
  7. Replies
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    CO safety of LP kitchen stove

    In an attempt to keep my home warm between generator runs, I lit a couple of burners on the range, and adjusted them for a moderately low flame, as blue as possible.

    3 hours later, my home had...
  8. Replies
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    I was worried about the fan being out of balance,...

    I was worried about the fan being out of balance, or worse yet, throwing ice shrapnel into the coil.



    By the time the power comes back on, the weather will probably be OK for 90 minute...
  9. Replies
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    OK, thanks, BT. The more I think on it, the...

    OK, thanks, BT.

    The more I think on it, the more I suspect that suction pressure couldn't go over 100psi unless the inlet plumbing to the compressor was warmer than the 32 degree ambient temp,...
  10. Replies
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    When humidity went to virtually 100% yesterday,...

    When humidity went to virtually 100% yesterday, unit looked like a wedding cake long before the 90 minutes were up. Most of the coil would defrost within 7-8 minutes, but one loop would still have...
  11. Replies
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    Marc's right on the 'other fuels'. My other fuel...

    Marc's right on the 'other fuels'. My other fuel is LP, which allows a HP to beat a 95% furnace at any temp a cooling sized HP can heat a house.

    I can run everything except the dryer, water...
  12. Replies
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    The problem is I don't know of any really good...

    The problem is I don't know of any really good Heat Pump techs, nobody around here seems to have a HP.
    With 13 cent electricity, HPs are pointless except for those of us so far from any human...
  13. Replies
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    question for beenthere

    in closing this thread:http://hvac-talk.com/vbb/showthread.php?1462771-Outdoor-coil-defrosts-unevenly&p=17293631#post17293631

    you said I need somebody to repair my system. You didn't say adjust or...
  14. Replies
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    I ran 104psi on a saturation temp calculator and...

    I ran 104psi on a saturation temp calculator and got 33.
    If suction pressure is 101-104psi, and outdoor temp is 32, does that mean there is no superheat, and the compressor is getting slugged...
  15. Replies
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    906

    Fired it back up and put a gauge on it. 32 out,...

    Fired it back up and put a gauge on it. 32 out, 69 in.
    Was expecting 310 +/-20psi high, 86 +/- 5psi low.
    High started out about 260, rose to 302 within ten minutes and stayed there. Low started...
  16. Replies
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    This AM I checked it and the area behind the...

    This AM I checked it and the area behind the fourth grille from the bottom had solid ice on it immediately AFTER a defrost.
    I'm afraid it might damage the coil, so I guess I've got to shut it off,...
  17. Replies
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    906

    That's what I was afraid of. When the tech...

    That's what I was afraid of.
    When the tech pronounced the charge 'spot on' (pressures matched the chart in heating mode), he unhooked his gauges and it became obvious that his hoses and manifold...
  18. Replies
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    The area that doesn't want to melt is the fourth...

    The area that doesn't want to melt is the fourth grille slot from the bottom, or the 7&8th tubes from the bottom.
    Here's some pics:

    Before defrost:
    447971

    After 2 minutes:
    447981

    After 4...
  19. Replies
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    906

    Outdoor coil defrosts unevenly

    Is this a problem?

    32 degrees, foggy and raining here. Ideal weather for making a heat pump look like a wedding cake.
    It's set to defrost after 90 minutes of running time.
    Defrosts were...
  20. This is the Ask Our Pro's forum, and only Pro...

    This is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise, commentary, or ask questions of the OP here.

    You can find the rules for posting and...
  21. Compressor and sound blanket questions Goodman GSZ130181

    What brand/model compressor is in a Goodman GSZ130181?
    Is the GSZ unit any different from the VSZ130181 other than styling?

    What's the best/most effective compressor sound blanket to buy for it?...
  22. Plenum transition and flex boot questions

    When I look at pictures of installation on this site, I don't think I've ever seen a flex boot on a furnace outlet to supply plenum connection.

    When quoting my furnace last year, the installer...
  23. This is the Ask Our Pro's forum, and only Pro...

    This is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise, commentary, or ask questions of the OP here.

    You can find the rules for posting and...
  24. Right. Currently it runs 12 minutes low, then...

    Right. Currently it runs 12 minutes low, then high, and with the mini split helping out it almost never goes high.

    I'd have it changed to only run in high fire if I had a central heat pump, to...
  25. Goodman hybrid (HP/Propane) staging and BP

    Well, I didn't take my installer's advice and let him stick a 2 ton Goodman coil on my new GMH950453BX furnace last year so I could market the home as "A/C ready".

    Then I had a Fujitsu 9RLF mini...
  26. I'm sure the A/C was way oversized for conditions...

    I'm sure the A/C was way oversized for conditions in the mold year, as they probably had the t-stat set for 90 or 100, believing their installer's instructions to let the humidity control the A/C.
    ...
  27. Humidity control in seasonal Florida home

    Some friends have a double wide in Lady Lake FL.
    A few years ago, a HVAC contractor sold them a humidity sensing t-stat and told them it would run the A/C whenever the humidity got over the set...
  28. Replies
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    This is the Ask Our Pro's forum, and only Pro...

    This is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise, commentary, or ask questions of the OP here. Please apply to the AOPC today, thank you.
    ...
  29. Replies
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    Found a pair (one male, one female) of mallards...

    Found a pair (one male, one female) of mallards in my parents' wood boiler firebox a couple of years ago. That explained the rotten outdoor smell that spring/early summer. Never smelled anything in...
  30. Replies
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    As a consumer, I think there is considerable...

    As a consumer, I think there is considerable market opportunity in propane country for an air source unit that can put out substantial BTUs at minimal ambient temps, as long as:

    1. It's...
  31. Replies
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    MXZ-3B24NA might be the North America equivalent....

    MXZ-3B24NA might be the North America equivalent.
    It's AHRI rated to heat 25k at 47 and 14k at 17, with maximum output of 30,600 at 47 and 18,800 at 17. AFAIK, they don't publish 5F specs for...
  32. Replies
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    This is the Ask Our Pro's forum, and only Pro...

    This is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise here. Please apply to the AOPC today, thank you.

    You can find the rules for posting and...
  33. Inverter minisplits, high heating BTUs and low temp performance

    I noticed that Mitsubishi advertises that their minisplits put out more rated BTU on heat than on A/C, and advertises a min-max range that puts max BTU much higher than 'rated BTU'.
    I also notice...
  34. Update

    tedkidd should read this. My tiny furnace putting out 39,800 btu/hr on propane is too big for my 1200 sq ft, 1970's ranch house in Michigan.

    I'm living in the house, getting 30% run times (10 3/4...
  35. Replies
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    1,664

    This is the Ask Our Pro's forum, and only Pro...

    This is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise here. Please apply to the AOPC today, thank you.

    You can find the rules for posting and...
  36. Replies
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    I thought about it when I bought the system back...

    I thought about it when I bought the system back in February, but since I expect to be here 1-2 years, couldn't justify the extra money for the HP, GMVC furnace, and communicating thermostat I...
  37. Replies
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    It's got to be way more than 70% when the flue...

    It's got to be way more than 70% when the flue gas leaves my house at 82 in autumn weather. I'll go with your 93% figure.
  38. Replies
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    How much is the efficiency drop, is it like...

    How much is the efficiency drop, is it like having a 92% instead of a 95% furnace?
  39. Replies
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    Slightly less efficient because it's running more...

    Slightly less efficient because it's running more combustion air than necessary?

    I'm glad I didn't let anybody talk me into a 70k furnace. My 46k is running 9 minutes out of 27 on low stage in 40...
  40. Replies
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    efficiency of two stage LP furnace

    Let's say I have a 95% two stage furnace, like a Goodman GMH95 series, which uses a constant speed combustion air blower with a two stage gas valve, and I'm burning propane in it.

    Will the...
  41. Replies
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    3,750

    This is the Ask Our Pro's forum, and only Pro...

    This is the Ask Our Pro's forum, and only Pro members that have been vetted by the AOPC may post advise, commentary or ask questions of the OP here. Please apply to the AOPC today, thank you.

    You...
  42. Replies
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    I can't believe I typed that. 5,000 btu/hr or...

    I can't believe I typed that.
    5,000 btu/hr or 5k btu/hr, not 5 million btu/hr.
  43. Replies
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    You're probably right that the blower draws more...

    You're probably right that the blower draws more than 100w.
    It's a 4 speed 1/3hp blower, so maybe 150-200w would be a better estimate on the lowest speed. I think I'll shut it down, I doubt it adds...
  44. Replies
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    I've got a couple of bottom of the line 5000k...

    I've got a couple of bottom of the line 5000k units, one in the master bedroom that I can't really circulate.

    This AM I stuck one in the bathroom which has two doors and is in the center of the...
  45. Replies
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    Window A/C: 9.7 EER = ??? SEER

    What would be the approximate SEER of a window unit rated at 9.7 EER?
  46. I wish to thank everyone who generously donated...

    I wish to thank everyone who generously donated their time to helping me.

    There was a weekend sale, so I devoted my Sunday afternoon to deciding what I'm buying. My best estimate of design heat...
  47. Replies
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    If somebody is generous enough to do a full calc,...

    If somebody is generous enough to do a full calc, that would be wonderful.

    But what I really need is some idea of the basement heat loss, one guy says 11k, which sounds reasonable, but then...
  48. Replies
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    So, does the basement lose about 11k, or not?...

    So, does the basement lose about 11k, or not? :bump:

    If anybody wants to take a shot at the whole house, I forgot to mention that 6x7 sliding patio door is double pane, clear glass.
  49. Replies
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    Thanks. I was hoping my calcs were off, I was...

    Thanks. I was hoping my calcs were off, I was getting 15-20k for the basement.

    What about the above ground part of the basement with zero degree air on the other side?
    60 Td, 280 square feet,...
  50. Replies
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    Heat Loss - block basement

    In the Lansing, MI area, 0F design temp, ~50F deep ground temp, 7000 heating degree days, approximately what would be the design BTU loss from a standard block basement, 30' x 40' x 8', with 6'...
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