Input on Unico - Page 2
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Thread: Input on Unico

  1. #14
    Join Date
    Nov 2003
    Location
    northern mass
    Posts
    411

    Ha ha ha

    Unico is in a class of their own compared to other HV brands.

    I wouldn't even entertain the idea of another brand.

  2. #15
    Join Date
    Nov 2004
    Location
    Seattle Area
    Posts
    96
    I don't want to disrupt this thread but, have any of you tryed to zone a unico system. I had a customer that wanted two 4 zone hi-velocity systems. I called Unico and they would not say yes or no. I installed two 4 zone conventional systems instead, oh and a full radiant floor system, SWEET.

  3. #16
    Join Date
    Jan 2005
    Location
    Perth - Western Australia
    Posts
    775
    unico is operated by a splinter group from spacepak, when they left spacepak they could not take patented designs with them. space pak has been around since like the 40`s
    i have seen there original equipment still running strong
    attend a spacepak seminar before you go with unico
    you will see how unico grasp at straws to get where spacepak is. Spacepak is clearly a better more reliable & simpler product, trunk is far superior too.
    see for yourself & dont be misled.
    The Captain

  4. #17
    Join Date
    Feb 2005
    Location
    Alabama
    Posts
    534
    1man, I asked that question about zoning at the class I went to. The Rep there said Unico systems should not be zoned, instead try to use multiple systems. Something about maintaining air balance if I remember right.
    "If you can't fix it, don't break it."

  5. #18
    Join Date
    Aug 2004
    Location
    middle georgia
    Posts
    239
    I have installed spacepak and unico. The spacpaks are smaller and you only need one part number when ordering. With unico you have to order about 4 freakin parts to build an airhandler. I just worked on an old dunham-bush HV system last month. I think they are now spacepak.
    Please step AWAY from the condensing unit.

  6. #19
    Join Date
    Apr 2003
    Location
    the Great Pacific Northwest
    Posts
    607
    Originally posted by 1manband
    I don't want to disrupt this thread but, have any of you tryed to zone a unico system. I had a customer that wanted two 4 zone hi-velocity systems. I called Unico and they would not say yes or no. I installed two 4 zone conventional systems instead, oh and a full radiant floor system, SWEET.
    From Unico tech bullitin #110
    Therefore, do not reduce the airflow below 200 cfm per
    nominal ton. Likewise, do not bypass the supply air into
    the return duct, as this is similar to reducing the airflow.
    If you close off a main trunk you must open another. In
    other words, make sure that the number of open outlets
    remains essentially constant.
    The most common type of system has two zones, where at
    any given time, the airflow never falls below the minimum.
    Delivering more than the minimum amount of air
    is rarely a problem. To illustrate, consider the following
    examples.
    Example 1. Consider a nominal 3-ton application with
    two equal zones. Each zone has a plenum serving each
    area. The minimum airflow is 600 cfm so the system
    requires at least 15 full open outlets. Both zones are installed
    with 10 outlets. Each plenum has a two-position
    damper that is fully open or partially open (in the closed
    position). When either zone requires air, the damper in
    the plenum for that area is fully open. Otherwise, it is
    partially closed equal to half the airflow (or the equivalent
    of 5 full outlets). With either zone calling for conditioning
    the minimum number of outlets is 15 and with both
    zones open the number of outlets is 20. Notice the number
    of outlets never drops below 15 when the system is
    Technote 110 Page 2
    Copyright 1999 Unico, Inc.
    operating. The actual number of outlets in each zone does
    not have to be equal so long as the equivalent of the
    minimum number of outlets is always open.

  7. #20
    Join Date
    Feb 2005
    Location
    Alabama
    Posts
    534
    Ummm yeah, what tech said, LOL.
    I do remember that from the class.
    "If you can't fix it, don't break it."

  8. #21
    Join Date
    Nov 2004
    Location
    Seattle Area
    Posts
    96
    What concerned me was that their "engineer" basicly told me, "if you zone it,we don't own it." I was a little nervous with zoning after that, O.K. alot nervous. I got the impression that zoning the system would lead to no warranty. I just have a hard time installing something the manufacturer will not get behind.

  9. #22
    Join Date
    Feb 2005
    Location
    Alabama
    Posts
    534
    I can understand that 1man. I think Unico Systems aren't really meant to be zoned. Guess it's the way they're designed. I sometimes disagree with zoning, multiple systems are actually better on certain applications.
    "If you can't fix it, don't break it."

  10. #23
    Join Date
    Mar 2005
    Posts
    3

    unico

    can anyone tell me which they think would be better for a 3500 square foot ranch near the shore in nj, i am so confused but have almost decided on one of the following options-the house is kind of chopped up due to several crazy addtions with lousy ductwork setup- a unico system with air and heat or a unico for the air and hot water baseboard for the heat with a boiler mate water heater( will be about$5000 more)any advice would be greatly appreciated

  11. #24
    Join Date
    Apr 2003
    Location
    the Great Pacific Northwest
    Posts
    607
    Momav:
    Give us some bio in your profile and post as new thread you'll get more response.

  12. #25
    Join Date
    Mar 2005
    Posts
    3
    thanks!new to this, guess you can tell

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