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Largest Gas Residential Furnace

AlPro Member Posts: 7
Does anyone know what is the largest residential natural gas 90+ efficiency furnace available? Is there a 200,000 BTU furnace?
Thank you! :-)


  • wogpa67
    wogpa67 Member Posts: 238
    Usually 120 - 140 input is the max. Are there windows in the house?
  • Tim McElwain
    Tim McElwain Member Posts: 4,596
    To get 200,000 you have to twin two furnaces of 100,000 each. They have to be the exact same model and everything on them has to be set up the same. It also requires alterations to the duct work.
  • John Mills_5
    John Mills_5 Member Posts: 950
    Do you really need that much? We took a house with twin 100K 80% furnaces and went to a single 100K 95% and it heats fine.