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  1. #27
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    Quote Originally Posted by timebuilder View Post
    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.
    But, my neighbors are telling me their HVAC+Duct's fine. Only mine having such hot/cold spots, etc. Also, we all seem to have a peculiar placement of return registers which when I bought the house had it checked out in a rudimentary fashion. What I understood and was told it's correct to create a flow of air, etc.
    Anyways, the only other thing that comes to mind is as follows. All of this was done sometime back. Most probably at that time it was heating only HVAC (no cooling). The proof in the pudding is many of my neighbors still have the oil-based HVAC (huge tank in basement) and no centralized AC, just window ACs. Is there a possibility that these manual J, D, S, etc. are different for heating and cooling ?

  2. #28
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    Quote Originally Posted by timebuilder View Post
    If this is a gov't home, you probably DON'T have enough insualtion.
    True, but my outside wall's a thick trus stucco and inside's plaster and in-between I confirmed have R10 insulation. My attic I had insulated with fiber of R35 and topped it with R20 about 18 months back. I did miss a spot about 3' x 4' and which I believe is the root cause of my 2nd. floor bedroom behaving abnormally. The only un-insulation part is my basement....which I am trying to do myself now..

  3. #29
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    Quote Originally Posted by jeremyhall.tech.sc View Post
    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..
    Service Magic I might agree but not Angie's List, it goes via consumer reviews only. There's an ad portion but if you're wise you'll stick to consumer reviews.

  4. #30
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    Quote Originally Posted by timebuilder View Post
    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.
    Thanks. As I was mentioning I think i found someone and sent him the link to this thread. He just called me to say "Got it .. what you need" and (2) tell everyone in the forum : thanks.

  5. #31
    Join Date
    Jan 2011
    Location
    greenville , sc
    Posts
    718
    Quote Originally Posted by wisepole View Post
    Service Magic I might agree but not Angie's List, it goes via consumer reviews only. There's an ad portion but if you're wise you'll stick to consumer reviews.
    nope not true at all..... but hey you be the judge.
    catch a man a fish , feed him for a day.
    teach a man to fish , ruin a good business opportunity.

  6. #32
    Join Date
    Nov 2006
    Location
    Southeastern Pa
    Posts
    18,806
    Quote Originally Posted by wisepole View Post
    But, my neighbors are telling me their HVAC+Duct's fine. Only mine having such hot/cold spots, etc. Also, we all seem to have a peculiar placement of return registers which when I bought the house had it checked out in a rudimentary fashion. What I understood and was told it's correct to create a flow of air, etc.
    Anyways, the only other thing that comes to mind is as follows. All of this was done sometime back. Most probably at that time it was heating only HVAC (no cooling). The proof in the pudding is many of my neighbors still have the oil-based HVAC (huge tank in basement) and no centralized AC, just window ACs. Is there a possibility that these manual J, D, S, etc. are different for heating and cooling ?
    If there are differences in what would otherwise be identical homes built from identical plans, that suggests that someone was not following those plans. Therefore, the recommendation to start at square one.

    Just how old are these homes?
    [Avatar photo from a Florida training accident. Everyone walked away.]
    2 Tim 3:16-17

    RSES CMS, HVAC Electrical Specialist

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  7. #33
    Join Date
    Jul 2002
    Location
    Zelienople, Pa
    Posts
    2,965
    I don't think you will be happy with the cost of a professional evaluation before even getting to solving your issues.
    If I was called out to perform Manual J,D, & S along with duct blaster tests to evaluate CFM, it wouldn't be cheap.
    These contractors you've called out probably have been burnt before and are very cautious. I know I've been there before after investing 16 hours of my time and coming up with a few solutions, the HO always passed because they thought there could just be an inexpensive adjustment made to fix things...
    How tall are you Private???!!!!

  8. #34
    Join Date
    Apr 2007
    Location
    Saint Augustine, Florida, United States
    Posts
    1,156
    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.
    It is possible that all your neighbors have the same problems, have you talked to any and found someone who has had theirs SOLVED? Get the name of their Co. OR:

    Tell the next company or the one of the bunch that you liked the most that these are the things you want looked at and FIXED. It does not fall under a normal "tuneup" so don't try to schlep the tuneup tech into trying to fix it. He isn't equipped to deal with your laundry list of problems. Schedule a real service call and address your concerns to the office so they have an idea who on their staff would be best to send. Very often the big companies aren't going to be interested in the scope of work during the BUSY season. Good luck, pay once and enjoy your home for years to come.

  9. #35
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    I got what to ask, who to ask and how to ask. I'll post once I have more information.

  10. #36
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    Home built: 1964, 1000 sq. ft, 2 storied and thus it's 500 sq ft per floor.

  11. #37
    Join Date
    Feb 2010
    Location
    Landis North Carolina
    Posts
    528

    Hmm

    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.
    so you guy's just service equipment only? When did service techs. stop doing air flow/balancing? When you go to do clean/check thats all you do? Most of the time the advice asked here turns out to be duct/airflow issue,and seeing how to properly do the job dont we need to be able to balance duct systems? Believe me ive done many and yes it is time consuming and sometimes a pain, but they call us to evaluate,troubleshoot, and make it right.Just imagine if you called a plumber and he said, oh its a faucet malfunction we dont do that you have to call lowes! Just saying even if its just a redimentry balance, you can usually get it dialed in close enough to make customer happy!Just like a thread earlier,about the forklift, dont know about you but i hate sending other people my money,Ive bought more tools this way than any other reason,to be full service one stop shop, btw, sealed blower?sounds like lazyness to me.When people recommend me they usually say something like call keith he's thorough and does it right.I always check over duct system and add hangers or reconnect as needed,if major rework is needed inform them and give quote!What opinion is the customer going to have when they pay and you leave and air isnt flowing every where! Bad impression and now lack of confidence=customer lost! And calling me. Thanks for all the business! lol

  12. #38
    Join Date
    Feb 2011
    Location
    New Jersey
    Posts
    170
    I agree, unfortunately it seems that how the HVAC system works. You need 1 person for furnace, 1 person for duct work and (maybe) yet another one for any electrical work. I finally got hold of the guy I was mentioning earlier and he stated when he does tune-up services he can't tune the system till he reviews the air flow across the registers and thus he'll take measurements first running the system full throttle and then adjust accordingly. Post adjustments, he'll take measurements again and based on condition of the duct work, design, etc. he'll either certify all's good or give further recommendations. He's absolutely positive the duct work in my house is correctly designed since as per him he knows the place and told me these are the cookie cutter houses built post war and has the classic approved design for duct work. In all probability either a register's gone bad (i.e. clogged) or a damper's gone bad, etc....as such he feels there's absolutely no need to do any manual J, D, analysis.

  13. #39
    Join Date
    Aug 2007
    Location
    Northern VA 38 degrees N by 76 degrees W
    Posts
    5,060

    1964 home

    Quote Originally Posted by wisepole View Post
    I agree, unfortunately it seems that how the HVAC system works. You need 1 person for furnace, 1 person for duct work and (maybe) yet another one for any electrical work. I finally got hold of the guy I was mentioning earlier and he stated when he does tune-up services he can't tune the system till he reviews the air flow across the registers and thus he'll take measurements first running the system full throttle and then adjust accordingly. Post adjustments, he'll take measurements again and based on condition of the duct work, design, etc. he'll either certify all's good or give further recommendations. He's absolutely positive the duct work in my house is correctly designed since as per him he knows the place and told me these are the cookie cutter houses built post war and has the classic approved design for duct work. In all probability either a register's gone bad (i.e. clogged) or a damper's gone bad, etc....as such he feels there's absolutely no need to do any manual J, D, analysis.
    your home was built with a duct system for heat only. Your contractor is absolutely positive your duct system is correctly designed for what? You have an heating and AC system not heat only.

    If he where to do a manual J it would show you the cfm in each room for both heating and cooling and could determine what size ductwork and number of registers that each room would need.

    He may be telling you what you want to hear to gain your confidence.

    He has no way of knowing how many cfm's are required for heating and cooling for each room, they will be different.

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