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Type: Posts; User: scalar

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  1. Do add-on woodstove catalytic converters exist?

    Is it possible to buy add-on catalytic converters to burn off creosote and recover heating energy, for old-fashioned "metal box with a flue" woodstoves like pot-belly stoves or antique kitchen...
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    Solar storage above 100 C / 212 F?

    Is there any method available to homeowners to store thermal energy above 212 F?

    I see evacuated glass / heatpipe solar collectors can be extremely efficient at capturing solar energy, but...
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    HVAC Teacher: Open the expansion valve all the...

    HVAC Teacher: Open the expansion valve all the way (bypass it), and the piping becomes an open loop from compressor outlet to inlet with no pressure differential anywhere.

    keeplearnin: There would...
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    Winter and the server room A/C .. round 4

    It's again winter in Wisconsin, and it's -10 F outside. The server room A/C is acting up again, no surprise since it's really just meant to be a summertime residential unit installed for the wrong...
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    Is there such a thing as a counterbalanced scroll...

    Is there such a thing as a counterbalanced scroll compressor that minimizes vibration?

    A mini screw-type axial compressor with noise mufflers?

    A variable-frequency-drive, high RPM compressor...
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    Window A/C Compressor "Throbbing"?

    Is there some specific explanation to the "throbbing noise" that some window compressors produce?

    ,

    In my quest for a "quieter" window-shaker I have recently purchased a wide/short 6000 BTU...
  7. Is there such a thing as a "scroll filter"?...

    Is there such a thing as a "scroll filter"? Basically this would be like a film camera with a supply spool and a takeup spool.

    Load in a 20 ft roll of filter media, and over time as the system fan...
  8. 1-2 year residential air filter replacement?

    What options are available to reduce the fooling around with HVAC to make it so a residential system can run for at least a year without filter replacement? I value ease of system maintenance over...
  9. At the other place where I work, the boss hates...

    At the other place where I work, the boss hates seeing the mini-split running in the winter so much that he wants to just cut a hole in the server room door for an intake vent grille, and cut another...
  10. This forum is useful as an educational tool for...

    This forum is useful as an educational tool for non-professionals (like me) who want to better understand all their system options. So this is probably worth talking about even if I personally won't...
  11. Using server room to heat rest of building in winter?

    The comment from the winter/glycol cooling thread...



    This is a very interesting question. Do large businesses normally blow server room heat outside, rather than using it inside for heating...
  12. A window cannot be opened. The server room...

    A window cannot be opened.

    The server room just so happens to be located underground in a windowless space below the front entry doors. My boss calls server room "the bunker" due to the really...
  13. We have the Mitsubishi Mr. Slim mini-split with...

    We have the Mitsubishi Mr. Slim mini-split with low ambient, but operation JUST to -40 F isn't good enough.

    Last year there was a period where it was -40 F to -60 F on and off for a couple weeks,...
  14. Who makes glycol-only winter server room cooling? (not a/c)

    I am not an HVAC professional but I have read this forum for years for fun. I have the usual conundrum that gets slammed on these forums.

    - Server room, needs 24/7 cooling
    - Northern freeze-yer...
  15. Winter server cooling - using A/C vs direct outside-air intake?

    This is a slightly contentious issue between me as the network server-room administrator and my boss who is always eyeing the bottom line. The building uses a huge nasty old unzoned forced-air...
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    Well, it looks like they succumbed to accepting...

    Well, it looks like they succumbed to accepting the fact that they need to do the pump power right. I saw the installer again on Monday, and the unit is working now, and he said it's ready to go, but...
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    Wednesday update: On sunday it was getting...

    Wednesday update:

    On sunday it was getting really hot in there, so I decided that well, even if it is dripping, it's too hot in here, and so tried to use it again.

    Somewhere along the way there...
  18. Thread: CHOMP!

    by scalar
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    4,208

    This sounds like a story with a very bad and...

    This sounds like a story with a very bad and gruesome ending.

    Is that a return duct? Where's the blower? Squirrel-cage I assume? Bet there's a good bit of suction down in there..
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    Yep, new A/C installed in the server room, which...

    Yep, new A/C installed in the server room, which averages 84 degrees even on cool summer days with the equipment that must be always-on.

    At first I was proposing sticking a huge used $100 Fedders...
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