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  1. Replies
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    I am a "one of builder" and rehab about 10 houses...

    I am a "one of builder" and rehab about 10 houses a year, plus maintain about 30 properties.
    I have never shopped price, but I do not like paying top dollar for some one to do hack work, or for me...
  2. Replies
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    1,344

    Hacks, Hacks, Hacks

    20+ years building - same framer, same rocker, same plumber, same electrician, trim guys come and go BUT HVAC!! try a new one every few months.
    Why are so many people going "DIY", why pay someone...
  3. Replies
    3
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    678

    can not get Lennox replacement HP ?

    One of my houses has a Lennox HPXA12-030-230-03 exterior HP unit, that was hit by vandals (cut the coils out and destroyed the housing.

    My sub said that Lennox does not have a compatable HP unit...
  4. Replies
    26
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    3,275

    Wifelet, Forgot- after removing the insulation...

    Wifelet,
    Forgot- after removing the insulation and scrubing bown the joist with a bleach solution, spray them with Bora-care.
    The Bora-care will soak 2" into wood members and inhibit mold growth,...
  5. Replies
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    3,275

    Wifelet, Do'nt even bother thinking about your...

    Wifelet,
    Do'nt even bother thinking about your ductwork till the water problem is corrected. And I mean corrected, not covered over.

    What type of soil do You have ?
    what is the Topo of Your...
  6. Replies
    6
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    892

    "I would stay away from the mom and pop...

    "I would stay away from the mom and pop companies. Some will do a great job but for the most part they are far and few."

    I have had the opposite experiance, with all subs.

    With a small company,...
  7. Replies
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    1,570

    Mark, I can tell You from what I have learned...

    Mark,
    I can tell You from what I have learned the last few days
    (the 1st past was written 4 days ago)

    Last few days it has been (45deg, 90%RH) at night and
    65deg, 60-90%RH in daytimes.

    An...
  8. Replies
    4
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    1,570

    Hey all, I just finished a house with Graco...

    Hey all,
    I just finished a house with Graco Green foam insulation, I also have dual Infinity systems.

    I have been in the house 6 weeks, And had the ERV finalized 4 days ago.

    Without any...
  9. Replies
    10
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    2,269

    Drk, What type of insulation do You have ?, is...

    Drk,
    What type of insulation do You have ?, is it a tight home ?

    I am in maryland - outside 45 deg/ 80%RH.
    I am now running an ERV and inside temp of 71 deg.

    Looking at the Psychrometric...
  10. Replies
    32
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    5,436

    TB, In My case I allready have an ERV (bought...

    TB,
    In My case I allready have an ERV (bought and paid for) hanging from the Basement joist (bad advice from contractor #1), But I am no fool, It will work great to remove indoor humidity in the...
  11. Replies
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    Printed out a Psychromeric chart. In My example:...

    Printed out a Psychromeric chart.
    In My example: I find the original temp along the bottom, go up till it intersects the correct RH, then go horizontal till I intersect the "new" temp and this...
  12. Replies
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    2,269

    TB You back ?, Just for comparison: I have 4...

    TB You back ?,
    Just for comparison:
    I have 4 humidity/temp sensors around the house.Foam house, interior temp 70 deg, night time ext temp 20-25deg.

    Interior humidity 40%, no condensate.
    I let...
  13. Replies
    7
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    1,322

    Looking for a chart, or the mathamatic formula,...

    Looking for a chart, or the mathamatic formula, to find the RH when canging temp. Example: the air is 50 deg and RH of 60%, what is the RH of the same air if warmed to 70 deg ?

    Did some on line...
  14. Replies
    19
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    1,513

    Contractor #1 installed 2) Carrier FE4 infinity...

    Contractor #1 installed 2) Carrier FE4 infinity fan coils.
    The low voltage saftey of the condensate pumps are not tied in (I found out when the 2nd floor flooded last summer)
    Fired #1 (no...
  15. Replies
    5
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    1,238

    Carrier FE4, Not looking to "puirify" the air,...

    Carrier FE4,
    Not looking to "puirify" the air, just keep My coils clean as possible, so I am keeping the stock filter bay in the fan coil. The piece that came with the unit looks like it would pass...
  16. Replies
    5
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    1,708

    Carnak, That is one "small" filter on the...

    Carnak,
    That is one "small" filter on the "ultimate" intake.
    I am not modifing the actual unit, I wanted to add an "inline" filter to the 6" round fresh air intake, between the fresh air intake...
  17. Replies
    7
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    1,562

    You would think The larger HVAC supply houses...

    You would think The larger HVAC supply houses would carry ?

    It gets worse, I am the builder, not a HVAC sub, though I do have an account at the larger 2 Suppliers (R.E. Michal, Carrier Mid...
  18. Replies
    7
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    1,562

    Looking for "quality" HRV/ERV intake/exhaust...

    Looking for "quality" HRV/ERV intake/exhaust hoods.
    6" with built in 1/4" screen, siding flange would be nice too.
    Local supply houses are clueless, cant locate online either,

    Any...
  19. Replies
    5
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    1,708

    April Aire ERV: The internal filters "in" the...

    April Aire ERV:
    The internal filters "in" the april aire ERV are a simple "wire mesh" style.

    Thinking about transitioning the 6" fresh air to a 16" filter box then back to 6" between the fresh...
  20. Thread: IAQ options

    by nicholasa
    Replies
    6
    Views
    1,342

    I know this has been beat to death on here, BUT....

    I know this has been beat to death on here, BUT.

    Climate = Maryland (mixed humid)
    House = 2 story cape, open great room, SPRAY INPLACE FOAM
    Dual Infinity heat pumps.

    This house is getting a...
  21. Replies
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    Are return Air grill filter boxs worth the cost,...

    Are return Air grill filter boxs worth the cost, to help keep the ducts clean, or would they create more of a neg. presure in the return duct.

    Can anyone recomend a good return grill box...
  22. Grasshopper, how are You ducting the your HRV's...

    Grasshopper,
    how are You ducting the your HRV's ?
    If both the fresh air and stale air is plumbed into the main trunk (of the Air handler), then yes the air handler's fan must run for the HRV to...
  23. The heat pump's ductwork is in the attic - taped,...

    The heat pump's ductwork is in the attic - taped, and insulated (no large leaks). The HRV/ERV setup is one of dedicated return in common area (this 6" rigid return is run in conditioned space only) ,...
  24. Thread: HRV or ERV?

    by nicholasa
    Replies
    56
    Views
    32,939

    Heres another thought on the ERV/HRV debate. On...

    Heres another thought on the ERV/HRV debate.
    On the manufactures climate maps (that show where ERV or HRV's should be used, by climate). HRV's are for way up north, but ERV's are recomended for most...
  25. Thread: HRV or ERV?

    by nicholasa
    Replies
    56
    Views
    32,939

    Carnak, ...

    Carnak,

    http://www.aprilair.com/product.asp?ID=C80A4BDAF31E426399117EFAF5F263B5&categoryID=9DDC176A7AD948DCB0D14F348EB3FF1e

    I am thinking of going with a HRV instead, for winter time use only....
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