Page 4 of 5 FirstFirst 12345 LastLast
Results 40 to 52 of 56
  1. #40
    Join Date
    Feb 2005
    Location
    In a van by the river
    Posts
    618
    I've never heard anyone complain or have a problem with replacing filters too often! The sooner the better
    ## + years in the field never made you a know-it-all This industry is far more diverse than you are

  2. #41
    Earlier in this post CondenserDave said :

    "Don't start this fruit on duct design, please."

    Although I do beleive he was referring to me,I'm going to let it go until I find out for sure .Then he will get the duct design lesson of his life,and he will get it for free. And thats the same low price

    I charged him for the other lessons he has received during my tenure here. eg; many


    [Edited by fat eddy on 03-02-2005 at 02:08 PM]

  3. #42
    Join Date
    Apr 2004
    Posts
    7,680
    Originally posted by dash
    Why wouldn't a home owner want his A/C system to "clean" the air?

    Thats not what I said now is it.... I said clean their homes. As in they think its some sort of vaccuum cleaner or something.

  4. #43
    Join Date
    May 2004
    Posts
    39
    How about this dirt trapping system.

    We treat the water say like the chiller does. Spray the water and let our return air pass through it. Pretent the air is like a car passing through the car wash. The air will be cold and the dirst will be trapped in the water. This way we don't have to have evaporator coil in the system.

    What you guys think ?

    Have fun

  5. #44
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Originally posted by docholiday
    Originally posted by dash
    Why wouldn't a home owner want his A/C system to "clean" the air?

    Thats not what I said now is it.... I said clean their homes. As in they think its some sort of vaccuum cleaner or something.
    Sorry Doc,but I didn't say you said it ,but I admit I thought you were saying what Robo said earlier.Basicaly use a HEPA to clean (purify) your air.

    I think EAC's and media can do a great job,and home owners seem to agree,but the duct Must be sized to allow "better " filtration.

  6. #45
    Join Date
    Feb 2005
    Posts
    14
    Okay....I have a Honeywell filter. Not the electrostatic one or anything hooked up to any power source.
    It's the thick job (5" or so) and cost about $25 at Home Depot.
    When I have a new gas furnace put in soon, should I just go with the regular sized filter media? It sounds like I'm really restricting the air flow by using the thick one.
    I also have a UV light/filter bypass unit connected to the furnace as well as a HRV.
    I should get stock in the filter company!

  7. #46
    Join Date
    Jun 2004
    Location
    4H: Hot, Humid Houston H.O.
    Posts
    3,304

    Check your particular system

    Has anyone ever checked the pressure in your return, or the External Static Pressure? I would be highly skeptical of anyone who tells you an answer without knowing the health of your particular system. Without measuring, I don't see how any answer could be other than a stab in the dark.

    I'm no expert but if your system has reasonable ESP using your 5-inch filter, then I would continue using it. If the ESP is too high and changing to a 1-inch filter solves that problem, then you might do that. The acceptable ESP varies with the type of air handler, with my old system it was 0.5 inch water column and with the new one apparently it is OK up to 0.9 inch w.c.

    Best of luck -- P.Student

  8. #47
    Join Date
    Nov 2000
    Location
    Eastern PA
    Posts
    68,923
    Originally posted by dash
    Originally posted by docholiday
    Originally posted by dash
    Why wouldn't a home owner want his A/C system to "clean" the air?

    Thats not what I said now is it.... I said clean their homes. As in they think its some sort of vaccuum cleaner or something.
    Sorry Doc,but I didn't say you said it ,but I admit I thought you were saying what Robo said earlier.Basicaly use a HEPA to clean (purify) your air.

    I think EAC's and media can do a great job,and home owners seem to agree,but the duct Must be sized to allow "better " filtration.
    I agree. As long as the filter surface area is large enough and the ducting is properly sized for lower static even the most restrictive filter can be useful.

    For those who have allergy is best to go with the HEPA system along with properly located UV lights. If you don't have respiratory issues, just use a tight fitting filter that is not restrictive and change it regularly. If you have respiratory issues, go for a system that will do the best for your home air quality.
    Government is a disease...
    ...masquerading as its own cure…
    Ecclesiastes 10:2 NIV


  9. #48
    Join Date
    Sep 2004
    Posts
    119

    Talking hepa filter is big dog

    Hepa filter is the best no dought.We just installed a
    carrier aqua snap chiller.State requires 40 percent outdoor
    air minimum for the operating room.We installed a series
    of cartridge hepa filters and they are very expensive,1 inch pressure drop got to pay for a larger blower and
    electricity to run it.Had an indoor air quality test for
    the state and another for the insurance company.They rated
    the air 100 percent sterile. They last 6 months at time.

  10. #49
    Is it graduated , does it start wiyh a lower efficeincy like a 40 then a 75,then a 95 then a HEPA ? or just straight HEPA's ?

  11. #50
    Join Date
    Sep 2004
    Posts
    119

    Talking

    Straight hepas.Made to order from the filter company.It only
    does the 4 surgery rooms.It is pre filtered with 4 inch
    pleated filters.Got a toshiba freq drive motor, carrier
    premier link ccn network.Air quality is great,however when
    it rains that 40 percent outside air makes it hard to
    keep humidity in check.

  12. #51
    No reheat ? they are usually constant volume with hot water reheat coil or electric. Just curious, I'm wondering how other places do it.

    I got called out to a med college last night for a reheat coil not working on the same type of setup.

  13. #52
    Join Date
    Jul 2004
    Location
    midwest
    Posts
    2,868
    I just thought I would add some thoughts to this subject. It has been mentioned that the pressure drop should be checked when changing to a more restrictive filter and I agree but it is seldom ever done. The problem is these filters load up very fast and almost need checked every few days to see how long they can go if you are close to the allowed static on your system. Its hard enough to get people to change filters and when they start putting pleated filters in and forget to change them the problems are worse than with the throw away filters. There has to be some margin on the static to allow for the filter loading up in the time frame they are wanting to change the filters.

Page 4 of 5 FirstFirst 12345 LastLast

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event