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Type: Posts; User: watercop

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  1. Replies
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    Whenever we install a desuperheater / heat...

    Whenever we install a desuperheater / heat recovery system, we include an extra tank upstream of the tank (or tankless) water heater. The desuper then has coolest possible water to work on and its...
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    2,504

    Every indication from my Trane dist is that...

    Every indication from my Trane dist is that Hyperions are here to stay. I'm 2 for 4 on warranty problems, and they seem to leak a lot of air, but I still like them; just hope they work the bugs out.
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    True, but...

    ... it tops out at 500 hits, so where's the harm?

    I could search on "HVAC" or "that" or "meter" or "guage" or "cold" or "no DIY" and have similar 'risk' of many many hits.

    My particular issue...
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    Still an issue... The function now allows...

    Still an issue...

    The function now allows sub-4-character search subjects but fails to return results.

    For example, a search of "eev" is accepted but returns no results, but a search for...
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    Thanks for that - interesting that "EEV" didn't...

    Thanks for that - interesting that "EEV" didn't return more results.

    I was similarly frustrated awhile back by the inability to search for "20i" (as in Trane) - same basic result. I don't...
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    search function shortcoming

    The refusal to search for a short word is really annoying, often rendering the search function virtually useless.

    For instance, I'm having problems with a Trane EEV. So I ran a search on "Trane...
  7. That size house with described features should be...

    That size house with described features should be able to be designed so as to load out to about 2 tons. Then you have to figure out the cost increment between a high end two stage air source and a...
  8. Thread: pond.

    by watercop
    Replies
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    3,004

    Visit Greenbuildingtalk or Geoexchange.org for a...

    Visit Greenbuildingtalk or Geoexchange.org for a slightly less "reprimanding" experience.

    Pond sounds deep enough, but it must be reliably so. If it dries out some hot summer you could be very...
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    Before you commit to 4300 SF please look into the...

    Before you commit to 4300 SF please look into the 'not so big house' series authored by Sarah Susanka. Chances are you don't need anywhere near that SF

    That said, responding to your numbered...
  10. If it is a small attic consider having closed...

    If it is a small attic consider having closed cell sprayfoam applied to the underside of the sheathing and sealing the attic. With that done the space is pulled into the building envelope as an...
  11. I second that. As owner you want a turnkey...

    I second that.

    As owner you want a turnkey solution. If you separately contract with two or more parties, each can fingerpoint the other(s) if the integrated result is subpar. YOU DON'T WANT THAT!...
  12. Consider paying for a Manual J and D analysis...

    Consider paying for a Manual J and D analysis independent of bidding contractors. I do them for $300 for a typical house, and the reports (whole house load, individual room airflow needed, individual...
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    Free cooling, if I understand correctly, is only...

    Free cooling, if I understand correctly, is only feasible where earth temp is well below 50*F, else proper dehumidification is impossible. Places where earth temp is < 50 typically have short cooling...
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    Float switch trips out all 24 volt control power...

    Float switch trips out all 24 volt control power to unit and stat. When float switch returns to normal the stat will annunciate "wait" for up to 5 minutes depending on its setup.

    A properly...
  15. What happens during shoulder seasons during which...

    What happens during shoulder seasons during which little or no heating / cooling is needed?

    The "very small" on demand system has to tote the whole hot water load without preheat assistance. Does...
  16. Two tanks, without a doubt. Size the main tank...

    Two tanks, without a doubt.

    Size the main tank for the home's highest hourly hot water demand.

    Size the preheat tank for the home's typical daily hot water demand

    This arrangement is most...
  17. Another issue favoring use of two stage...

    Another issue favoring use of two stage compressors is humidity control. If humidity is a problem go with a two stage unit - it will run longer in lower stage and dehumidify better if it is set up...
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    That's a new one on me as well - thermostats do...

    That's a new one on me as well - thermostats do all manner of funky things these days, but it all comes down to sending 24 Vac down a particular conductor, or not...I don't see a grey area in that...
  19. Efficiencies are (or at least should be) rated at...

    Efficiencies are (or at least should be) rated at identical conditions mandated by AHRI, the industry clearinghouse for the ratings. The ratings are at conditions quite favorable to the equipment;...
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    Avoid yelling...no one wants to help a yeller ...

    Avoid yelling...no one wants to help a yeller

    Water temps you wrote are well within bounds.
  21. If EWT is low enough, there is no actual need to...

    If EWT is low enough, there is no actual need to run 1.5 GPM per ton. Water could come in at 60 and leave at 100 and still be within bounds for system operation albeit at some loss of capacity and...
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    Up in VA you may have entering water temps in the...

    Up in VA you may have entering water temps in the upper 50s or low 60s which makes for extremely efficient cooling performance. However, the system may be operating so efficiently that the compressor...
  23. 3/4" vs 1" loop pipe shouldn't be presented as an...

    3/4" vs 1" loop pipe shouldn't be presented as an extra cost option. Instead the proper diameter should be chosen to maintain the best balance between minimizing pump power and ensuring turbulent...
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    Where are you? It is sometimes the case that...

    Where are you?

    It is sometimes the case that more / hotter water is made in winter since heating operation is often characterized by higher compressor discharge pressure and temp.

    I'm near...
  25. Clogged drain would take all low voltage power...

    Clogged drain would take all low voltage power off unit if equipped with float switch.

    Has anyone looked at the possibility of high entering water temp?
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