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  1. #14
    Join Date
    Jul 2006
    Location
    Virginia
    Posts
    4,900
    you need someone to balance your system.call around and find a company that will perfrm a static pressure test ,and use a balometer and find how much air is flowing to each vent, see if they can redistribute the air it might be possible to use the duct system you have or it might need a renovation . then after that ask them about a heat tune up

  2. #15
    Join Date
    Mar 2005
    Location
    Suppy NC
    Posts
    4,517
    Quote Originally Posted by wisepole View Post
    To all - 1st. thanks for the information. I understand most of you are pros and my remarks might or might not have offended you. Trust me that was not my intention. From the responses received, it seems all of you have correctly understood my issue correctly. I was looking at exactly the type of comments which you've provided. Now that I know about manual J or D along with the other comment regarding checking the pressure in duct, I am now better informed and can proceed further.
    Yes, I'll look up the locator map within this site and move from there.

    In a nutshell, I don't think I have any issues with my furnace. The duct work and the placement of registers are SAME across all the houses within this complex, which is a condominium and was constructed by the Fed. Govt sometime back. I am thus pretty sure that architects and engineers were definitely involved. Additionally, I had the ducts cleaned recently and the cleaning service found 6 inches of grime in the return mains! As such, it's the original duct work. I rented a snake like camera thing and ran it via the duct work shining bright light from outside and I didn't see any severe crevices, mold or mildew.
    The issue is the blower blows too fast, i.e. if I place a 2" x 2" paper in front of the blower on 1st. floor it's just blown away about 6' ! As such, the room is heated/cooled very quickly which I am sure is not good for the equipment. Additionally, there's too much uneven distribution of heat/cold between 1st. and 2nd. floor. During heat (winter) 1st. floor gets heated which 2nd. floor remain cold and in summer, 1st. floor gets cold much quicker than 2nd. floor. The equipment is in the basement. . All of these lead me to believe I have issues with the duct work or the equipment is mis-matched. I inherited it from my previous owner. I checked the manual and it seems there are color codes (wires) with equals to low, medium, high settings for the blower and has 2 sets, 1 for cold, 1 for hot. These are the things that I want someone to review, then recommend and make changes. I in fact went ahead and bought a simple nanometer but fail to use it forcing me to return it.
    sounds like a balancing problem and no kind of pm is going to solve this issue. Raising or lowering the blower speed also in most case a waist of time unless it is done for balancing purposes.
    1st floor cold n hot 2nd floor not even close. Look more into pricing on resolving the balancing issue versing a pm
    may be as simple as installing damper to aid in better air flo to 2nd floor and less to first or major duct redesign.

  3. #16
    Join Date
    Jan 2008
    Posts
    2,127
    Uneven temps in 2 story homes is a very common problem. It's all about the duct work.
    It also sounds like your system is over-sized, and the tech needs to keep the blower speed high to have proper temp rise.
    "Hey Lama, hey, how about a little something, you know, for the effort." And he says, "there won't be any money, but when you die, on your deathbed, you will receive total consciousness." So I got that goin' for me, which is nice. - Carl Spackler

  4. #17
    Join Date
    Aug 2008
    Posts
    416
    Question???
    Before asking for a Manual D or S or whatever, there must be some tests that the OP could ask for that a tech could vist and perform. Ones that come to mind are (probably wrong terms):
    Total Static Pressure
    Air Flow, CFM (or is it FPM) at registers
    Air Flow at returns(is this measuable)
    Temp Rise
    Size of his unit
    Required airflow based on unit size/nameplate.

    Are there others??

  5. #18
    Join Date
    May 2009
    Posts
    520
    Quote Originally Posted by 2old2rock View Post
    A normal clean and check does not usually involve duct work.
    That is a whole separate issue. It is complicated and time consuming to properly evaluate duct work. A manual D is the starting point. And that book is like an inch thick. And most techs are not experts on ducts.
    I would call around for a company that will come over and do a proper duct evaluation if you really feel there is a problem.
    It won't be cheap.
    I agree. A complete duct evaluation is not your typical routine maintenance check. You should be prepared to pay quite a bit more for this service. And yes, call a smaller company if you want more personal service.

  6. #19
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    Quote Originally Posted by 2old2rock View Post
    It also sounds like your system is over-sized, and the tech needs to keep the blower speed high to have proper temp rise.
    Please help understanding this

  7. #20
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    Quote Originally Posted by simplyrollin View Post
    I agree. A complete duct evaluation is not your typical routine maintenance check. You should be prepared to pay quite a bit more for this service. And yes, call a smaller company if you want more personal service.
    Working on it, finding someone who's reasonable and does a good work. I might have finally found someone who had a basic question first. You are not alone in your community, if as you say everyone has the same placement of registers and duct design the only thing that could be different then would be your furnace size and/or availability of dampers within the ducts of others. He asked me to ask my neighbors and then contact him back. this way he'll be able to come prepared.

  8. #21
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    He also mentioned about some type of slide-in dampers/zone controls which can be installed from the register itself by sliding them in. Post tests for air flow he suggested that might be a good option, instead of trying to rip the walls to get to the ducts and install dampers (if need be). Any leads whether what he is saying makes sense and if so, can someone suggest any URL where I can read more about these slide-in type of zonal controls or dampers.

  9. #22
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    another good point, since it's an attic above 2nd. floor the very fact that cooling is not happening properly in summer and heating in winter suggest there's lack of insulation in attic. Is this something a HVAC specialist who's coming in to check static pressure and do these manual J, D, S, etc. stuff can see and comment upon?

    Also, I need to understand a design question related to duct work. Assume there's a duct feeing warm/cool air (as case may be) from basement going up. After it's done it's duty, i.e. supplied the air on 2nd. floor and assuming there's an attic above it does the duct immediately stop after the register or does it continue up/connect to something? Assume there aren't ANY other mains carrying hot/cold air.

  10. #23
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,560
    Quote Originally Posted by wisepole View Post
    The duct work and the placement of registers are SAME across all the houses within this complex, which is a condominium and was constructed by the Fed. Govt sometime back. I am thus pretty sure that architects and engineers were definitely involved.
    WHOA.

    This does NOT mean the HVAC system was designed correctly for these homes.

    Nor does it mean the original design is what is present in these homes.

    You CANNOT assume it is correct as built.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

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  11. #24
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,560
    Quote Originally Posted by wraujr View Post
    Question???
    Before asking for a Manual D or S or whatever, there must be some tests that the OP could ask for that a tech could vist and perform. Ones that come to mind are (probably wrong terms):
    Total Static Pressure
    Air Flow, CFM (or is it FPM) at registers
    Air Flow at returns(is this measuable)
    Temp Rise
    Size of his unit
    Required airflow based on unit size/nameplate.

    Are there others??
    He could ask for those, but since the design may not be correct, it's better he go with the advice we are giving. A good company will know what to do.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







  12. #25
    Join Date
    Jan 2011
    Location
    greenville , sc
    Posts
    718
    Quote Originally Posted by wisepole View Post
    Removed it, just venting my anger. Just a lowdown here. As per Service Magic + Angies List, top 3 companies I spent $ and each one did exactly the same thing (inspection) and each one complained about how bad the condition is and strongly recommended I upgrade to more efficient system which Fed. Govt is giving big rebates, etc. Each one, beforehand assured me they will take "careful" measurements and will adjust blower pressures, static, dynamic, transient and all other funky words related to pressure and give me the complete picture. At the end, all they did was look at exhaust, look at CO readings, confirm to me they can't touch blower compartment or heat exchanger since its sealed, did some fiddling with the control panel, ran a cloth over the locations which burn (mine is gas) and collect my $. This gives me a thought - after having seen what they do, it's a nice way to make $...
    service magic and angies list are vendor whores they place the biggest paying guys on top... try your local real-estate venue , or even the HOA..
    catch a man a fish , feed him for a day.
    teach a man to fish , ruin a good business opportunity.

  13. #26
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    19,560
    Quote Originally Posted by wisepole View Post
    another good point, since it's an attic above 2nd. floor the very fact that cooling is not happening properly in summer and heating in winter suggest there's lack of insulation in attic. Is this something a HVAC specialist who's coming in to check static pressure and do these manual J, D, S, etc. stuff can see and comment upon?

    Also, I need to understand a design question related to duct work. Assume there's a duct feeing warm/cool air (as case may be) from basement going up. After it's done it's duty, i.e. supplied the air on 2nd. floor and assuming there's an attic above it does the duct immediately stop after the register or does it continue up/connect to something? Assume there aren't ANY other mains carrying hot/cold air.
    If this is a gov't home, you probably DON'T have enough insualtion.
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

    AOP Forum Rules:







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