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Thread: Heating & Cooling Furnace toronto

  1. #1
    DIY Junior Member williamjames325's Avatar
    Join Date
    Oct 2013

    Default Heating & Cooling Furnace toronto

    I need a new Furnace my old Furnace is broken plz. you tell me which brand
    and i want a gas furnace http://cosmopolitanmechanical.ca/lennox-furnaces/2

    William james

  2. #2
    In the trades Dana's Avatar
    Join Date
    Jan 2009


    The one with the smallest burner that's still big enough to cover your heat load at the 99% outside design temp is usually the "right" one, from a comfort & economy point of view. There is some evidence that oversizing condensing furnaces makes for slightly higher efficiency, but the gains are small, and it comes at a slight reduction in comfort.

    Bottom line- a heat load calculation is an all-important first step for selecting ANY heating equipment.

  3. #3
    DIY Senior Member dj2's Avatar
    Join Date
    Aug 2013


    Call 2-3 local HVAC contractors or plumbers for evaluation and estimates.

    In my area, I would not use Lennox or Carrier, OOPS, I shouldn't have said that. I would go with Rheem only.

  4. #4
    Retired Defense Industry Engineer jadnashua's Avatar
    Join Date
    Sep 2004
    New England


    It seems that the vast majority of HVAC contractors come in, look at what's installed, and quote replacing it with the same capacity. This is often a BIG mistake for maximum efficiency and comfort. The fact that it kept you warm only means that it was at least big enough, but an older one may be 3-5 times oversized! Every time a burner turns off, you waste some energy up the flue. You get the best comfort and efficiency when it runs longer - more constant temperatures, and the burner (sort of like your car) is more efficient once it is up to temp.
    Jim DeBruycker
    Important note - I'm not a pro
    Retired Defense Industry Engineer; Schluter 2.5-day Workshop Completed 2013, 2014

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