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  1. #1
    Join Date
    Oct 2005
    Post Likes
    Are they the same units, if not what are the differences. I'm puting in a new system for my house. Want duel fuel and am stuck with oil as back-up. What would be the best system. Carrier or Lennox. Lennox does not have a variable speed oil furnace but may within the month. Any suggestions. Thanks

  2. #2
    Join Date
    Mar 2003
    PA/DE area
    Post Likes
    Do you really want to be the first???????????????LOL!!38ydb and Infinity are the same systems. 38ydb is the factory order number that denotes what model 38YD is 2 speed D for DUAL SPEED.38Yd is heat pump, 38Td is a\c.They give it the INFINITY name to go with system level(ie fan coils and furnaces and controls Infinity top, Performance 2nd,Comfort 3rd. Hope this helps.
    It's NOT the BRAND,it's the company that installs it!!!!!

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