Results 1 to 9 of 9
  1. #1
    Join Date
    May 2007
    Location
    Central Missouri
    Posts
    2

    2 Stage vs. Single stage compressor

    I am building a new home and am going with a hybrid (dual fuel) heat pump with a variable speed, high efficiency gas furnace for low temps. I am trying to decide whether to go with the Lennox dual stage compressor or the single stage compressor on the AC side. My builders HVAC guy suggested staying away from the dual stage due to the fact they are more expensive to repair should it be necessary. This kind of surprised me as having gotten bids from other HVAC contractors, they have all steered me towards the 2 stage compressor. Any help would be appreciated.

  2. #2
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,125
    Strange that he would say that.

    I recomend to most customers that want multi stage( 2 stage compressors) heat pumps and 2 stage gas furnace back up, to get the extended 10 parts and labor warranty.

    It may be that this contractor is not familiar with multi stage heat pumps.
    And isn't sure if he can get it to work.
    Contractor locator map

    How-to-apply-for-Professional

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

  3. #3
    Join Date
    May 2007
    Location
    Central Missouri
    Posts
    2

    Get It To Work?

    "It may be that this contractor is not familiar with multi stage heat pumps.
    And isn't sure if he can get it to work."

    Are you referring to installation or repair?

  4. #4
    Join Date
    Nov 2003
    Location
    Pompano Beach
    Posts
    103
    Ask your contractor about an extended parts and labor warranty. Most extended warranties will be between the homeowner and the manufacturer. They are excellent insurance policy if a part should go away. There is generally no out of pocket expenses inicurred by the homeowner when warranty repair is needed. Go with a 10 year. their costs vary to $400 - $600. Labor alone for a dual compressor changeout can easily exceed $600. Good Luck!

  5. #5
    Join Date
    Aug 2003
    Location
    Fort Worth, TX
    Posts
    11,347
    Quote Originally Posted by JJNewt View Post
    "It may be that this contractor is not familiar with multi stage heat pumps.
    And isn't sure if he can get it to work."

    Are you referring to installation or repair?
    He may be referring to both an installation and a start-up concern. Proper wiring of all controls related to staging, and proper calibration of staging so 2nd stage in either heating or cooling only comes on when needed. You don't want 2nd stage kicking in too early, or staying on too long.
    • Electricity makes refrigeration happen.
    • Refrigeration makes the HVAC psychrometric process happen.
    • HVAC pyschrometrics is what makes indoor human comfort happen...IF the ducts AND the building envelope cooperate.


    A building is NOT beautiful unless it is also comfortable.

  6. #6
    Join Date
    Mar 2005
    Location
    burlington county n.j.
    Posts
    9,744
    Quote Originally Posted by JJNewt View Post
    My builders HVAC guy suggested staying away from the dual stage due to the fact they are more expensive to repair should it be necessary.

    that may have been true in the past with the older 2 speed units.
    really not much to go wrong on the 2 stage scroll lennox uses.
    the added cofort of a 2 stage system is well worth the risk in my opinion.

  7. #7
    Join Date
    Jan 2004
    Location
    Lancaster PA
    Posts
    68,125
    Both installation, and repair if needed later.
    Contractor locator map

    How-to-apply-for-Professional

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

  8. #8
    Join Date
    Mar 2003
    Location
    PA/DE area
    Posts
    1,535
    Don't get a car with power windows either,to many things too go wrong!! Contractors Evolve or Die!!
    It's NOT the BRAND,it's the company that installs it!!!!!

  9. #9
    Join Date
    Aug 2002
    Location
    Office and warehouse in both Crystal River & New Port Richey ,FL
    Posts
    18,836
    Quote Originally Posted by czkidd View Post
    Ask your contractor about an extended parts and labor warranty. Most extended warranties will be between the homeowner and the manufacturer. They are excellent insurance policy if a part should go away. There is generally no out of pocket expenses inicurred by the homeowner when warranty repair is needed. Go with a 10 year. their costs vary to $400 - $600. Labor alone for a dual compressor changeout can easily exceed $600. Good Luck!
    Might want to review the rules on posting prices!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  
Comfortech Show Promo Image

Related Forums

Plumbing Talks | Contractor Magazine
Forums | Electrical Construction & Maintenance (EC&M) Magazine
Comfortech365 Virtual Event