Dual zone vs. Single zone?

Discussion in 'HVAC Heating & Cooling' started by zombieman, Mar 3, 2009.

  1. zombieman

    zombieman New Member

    Messages:
    1
    I'm shopping for a mini-split heat pump and noticed that the dual zone units are alot more expensive than the single zone units. What is the difference in the two? Thanks.
  2. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,949
    Location:
    New England
    Some actually use a separate compressor for each zone. Some use a separate evaporator for each zone. Duplicating the expensive bits adds to the cost.
  3. jimbo

    jimbo Plumber

    Messages:
    8,997
    Location:
    San Diego
    Well, for starters, you have an extra indoor unit. Also, you will have a bigger compressor. LG is now using some very fancy technology, a "variable" compressor.

    I am guessing a dual zone unit costs less than 2 single zone units>???
  4. alternety

    alternety Like an engineer

    Messages:
    650
    Location:
    Washington
    A factor in considering this is will the single zone coil provide even heat in the required area. In point of fact, will a dual zone accomplish this.

    It is effectively a window installed heater. Can you heat or cool what needs to be conditioned from such a unit without other air circulation. If no, and you do not have such an air circulation system, you have a problem. Since heat pumps tend to have low "warm air" temperatures to start with, this could be problematic.
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