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  1. #1
    Join Date
    May 2008
    Location
    Bergen County, NJ
    Posts
    36

    Frown Homeowner in need of technical advice

    Hi,

    I recently purchased a newly constructed home in Bergen county NJ and am having nothing but problems with my entire HVAC system (heat and cool). I have a split gas forced hot air funance / AC with one unit installed in my attic serving my second floor (3 bedrooms and 2 bathrooms) and the second unit installed in my basement serving my basement and first floor (kitchen, dining room / living room, family room and half a bathroom).

    My issue in the winter months is that the temps in each of my bedrooms differs greatly. The thermostat is installed in the hallway and can be set to 74 degrees but my master bedroom will be 78 degrees while my daughter room is only 69-70 degrees. When I questioned the HVAC technician who installed the unit he said that this is normal behavior.

    My issue in the summer is two fold. In this I mean, my second floor unit is now set to cool to 75 degrees but the bedroom reach this temp way before the therostat which in turn caused my bedrooms to get really cool and force my unit to run all day. Another thing that I noticed is that it takes several hours to cool my house a couple of degrees. The other issue is that my first floor unit is not cooling at all. My HVAC tech has been out over half a dozen times and each time he leaves stating everything has been fixed but once I get home and turn on the unit.... NOTHING!

    I know this is a long post but I would love if someone could tell me if the following is true;

    Is is true that it takes a fully operational HVAC unit one hour to cool a home one degree (i.e. If the house is 80 degrees and I would like it cooled to 74 degrees it should take the unit 6 hours of continuous running to reach this temp.)?

    Is it normal to have dramatic temp shifts in each bedroom during the winter months?

    Any information or pointers would be greatly appreciated.

    Thanks,

  2. #2
    Join Date
    Apr 2008
    Location
    Alberta Canada
    Posts
    2,246

    This can be correct

    The reason you have different temperatures in different rooms could be a couple of factors causing problem. Is the proper air flow comming through register or does room have greater heat loss/ heat gain than other rooms.( windows, insulation which way it is facing, sky lights etc.. You can get someone to come in and balance air flow.
    Secondly air conditioning can be a slow process due to the amout of moisture
    and heat load put on the house. you should always give your air conditioner the proper amout of time to cool house. Keep blind closed and start a/c 2 or more hour before you get home. you can also turn a/c on and set to higher temperatures until 2 hour before you get home for proper comfort.
    Do it right the first time.

  3. #3
    Join Date
    Jan 2008
    Location
    s chester county,pa
    Posts
    144
    and the fact that he bought a big box house.

  4. #4
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,324
    Depending on the outdoor temp, 80 to 74 could be 2 hours or 5 hours.
    Sounds like you having balancing issues with your second floor for the heating temp variations.

    Sounds like you need a new tech to look at your systems.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  5. #5
    Join Date
    May 2008
    Location
    Bergen County, NJ
    Posts
    36

    Frown

    I have tried turning on my unit a couple of hours before getting home but that really hasn't helped much because it's taking longer than two hours to get to a comfortable temp. I'll request that the tech balance the system but honestly I know I'm in for a fight because I've asked him time and time again to perform this task to no avail.

    Question for the pro's out there. Is there a certain amount of air that suppose to come out of each register? When I put my hand next to each of the vents I barely feel anything coming out, especially in during AC usage. Another question, should their be a register supplying cool/hot air in my hallway where my therostat is located?

  6. #6
    Join Date
    May 2008
    Location
    Bergen County, NJ
    Posts
    36

    Frown

    I_Bend_Metal,

    I estimate the square footage to be around the following;

    Basement - 500sq ft (laundry area / family room)
    First Floor - 750sq ft (kitchen, powder room, dining / living room)
    Second Floor - 750 sq ft (3 bedrooms, 2 bathrooms)

    The basement and first floor are serviced by the unit in the basement (please note the basement barely gets any heat from this unit) and the second floor is serviced by the unit in the attic.

    Thanks again for all the advice!

  7. #7
    Join Date
    Apr 2008
    Location
    Alberta Canada
    Posts
    2,246

    You have 2 furnaces

    [QUOTE=CoquiLostInNY;1871054

    You mean you have 2 furnaces in a 1400 Sq' house and he can't get it right.
    I thought 1 furnace in 1500 to 1700sq'. How old r furnaces. I am floored why he can't get it right. Tell him to get hooked up here and guys would love to help for small fee. I can't s why he is having such a hard time.
    Do it right the first time.

  8. #8
    Join Date
    Mar 2008
    Posts
    657
    like most the guys have already said, have another company come in for a second opinion. kinda sounds like a design issue to me.

  9. #9
    Join Date
    Mar 2008
    Location
    Grundy Co. IL
    Posts
    773
    I think beenthere, already gave you the right answer, find a new tech. I know this is the guy you have to deal with for any warranty work, so you will have to pay another company out of your own pocket, but if he can fix it, and you're comfy in you're new house, I think it might be worth it. Also if he is coming out adding more ref., have him find the leak and fix it while it's still under warranty. Good luck, sorry you're having a bad HVAC exp., but as you can tell from this web-site, we're not all like that.

  10. #10
    Join Date
    Apr 2008
    Location
    Alberta Canada
    Posts
    2,246

    more air is better

    Quote Originally Posted by CoquiLostInNY View Post
    . Is there a certain amount of air that suppose to come out of each register? When I put my hand next to each of the vents I barely feel anything coming out, especially in during AC usage. Another question, should their be a register supplying cool/hot air in my hallway where my therostat is located?

    Yes you do want go air flow coming out of register, could be long run or to small but you will need some good air flow to cool the room. Still keep blinds closed as much as you can. Keep door closed or densities fall into place and cold air ends up on main floor. There should only be return grill by thermostat
    and no supply. Try running fan continuisly to help temp swings.
    Do it right the first time.

  11. #11
    Join Date
    May 2008
    Location
    Bergen County, NJ
    Posts
    36

    Angry

    The saga continues... I just spoke to the HVAC contractor who's at my house for the fifth time in the past three weeks trying to get my AC working. He told me that my system was low on freon (which he filled two or three times already) but that he couldn't fill it when it was under 70 degrees outside. This sounds like total BS to me.

    When I asked him when and if he could balance my system he replied that he couldn't because I don't have any internal dampers and the reason for that was because my house was framed using 2" x 4". Because of this he had to use what he called "stack head" ducts. Mind you, the walls were fully exposed when he ducted my house.

    To all the pro's out there... Does any of this make any sense?

  12. #12
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,324
    Many techs don't charge systems when its under 70*F.

    He should have installed dampered takeoffs.
    Contractor locator map

    How-to-apply-for-Professional

    How many times must one fix something before it is fixed?

  13. #13
    Join Date
    Dec 2007
    Location
    Ohio
    Posts
    2,876
    Quote Originally Posted by CoquiLostInNY View Post
    I have tried turning on my unit a couple of hours before getting home but that really hasn't helped much because it's taking longer than two hours to get to a comfortable temp. I'll request that the tech balance the system but honestly I know I'm in for a fight because I've asked him time and time again to perform this task to no avail.

    One thing you need to think about....instead of turning your thermostats down so far, maybe leave them alone. If it is taking 5 or 6 hours to bring the temperature back down to your setpoint, do you think it might be better to just let the unit maintain a specific temperature? They might not run as long to keep up with a temperature as they will to catch up to a temperature.


    Quote Originally Posted by CoquiLostInNY View Post
    Question for the pro's out there. Is there a certain amount of air that suppose to come out of each register? When I put my hand next to each of the vents I barely feel anything coming out, especially in during AC usage. Another question, should their be a register supplying cool/hot air in my hallway where my therostat is located?

    I am going to guess that your basment unit is using metal ductwork and your attic unit is using (soft) or flexible ductwork?? I think at this point you may need to call out a new company to take a look at things. Tell them exactly what you have told us. They need to take a look in that attic and make sure none of the ductwork is restricted or crushed.

    Is the company you have coming out now the same company that installed the units???
    I need a new signature.....

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