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    leetaylor's Avatar
    leetaylor Posts: 8, Reputation: 2
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    #1

    Apr 15, 2009, 10:45 AM
    Garage furnace venting clearance
    I am installing my first 'Reznor' garage furnace for a customer. It is gas fired, 45000 BTU's and it will hang from the ceiling.

    I know that when it comes to venting, the vent should be at least two feet above the highest peak of the roof. Because of where the furnace will hang, making the vent this high will look terrible from the front of the house (it would need to be 7ft high!)

    The furnace is power vented, and I was wondering if the 'two feet above the peak' rule applies with power vented appliances?

    *for the record I have checked the manuals for the furnace, and also my code books, to no avail*

    Cheers!:D
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #2

    Apr 15, 2009, 01:04 PM

    I have vented those with out going up abpve the roof line. Strait out with the cap at least 18 in from the wall though.
    leetaylor's Avatar
    leetaylor Posts: 8, Reputation: 2
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    #3

    Apr 15, 2009, 03:38 PM
    Going out the side wall of the garage is plan 'B'. Since you mentioned it, what is the clearance around the vent pipe in this case? How far from the roof overhang?
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #4

    Apr 15, 2009, 03:47 PM

    What are you wanting to do? Go threw the roof just a littlle bit off the roof?
    mygirlsdad77's Avatar
    mygirlsdad77 Posts: 5,713, Reputation: 339
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    #5

    Apr 15, 2009, 04:11 PM

    I would suggest reading the venting instructions over again. There are many ways to vent this unit. Don't get stuck on one certain page and assume it the only way to vent. Its hard to say without seeing your exact situation, but you can vent out the roof without going above roof line as long as you are within the other standards of code. And you can terminate vent through a side wall with this unit. Clearances around pipe are the same for roof or sidewall terms. You can use single wall directly off the unit, but you must have at least 7 inches of clearence from any point of pipe. This means, once you get within seven inches of the wall or ceiling, you must convert to double wall pipe. Double wall pipe needs to have one inch clearance all the way around. Hope this helps. Please let me know.
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #6

    Apr 15, 2009, 05:03 PM

    I agree you can vent this unit almost anyway you like!
    leetaylor's Avatar
    leetaylor Posts: 8, Reputation: 2
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    #7

    Apr 16, 2009, 08:13 AM
    There isn't any info on venting in the online manual, I double checked.

    I think I'm going to vent through the sidewall, I'll make sure there's at least 18" between the vent and the roof overhang.

    Is there a special kit to bring the vent through the wall? (I'll be using 'B' vent so it will only need 1" clearance)
    Joshdta's Avatar
    Joshdta Posts: 2,549, Reputation: 45
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    #8

    Apr 16, 2009, 10:01 AM

    If it is wood construction you may want to use a wall themble. But yes 1'' clearance will be fine
    stivio's Avatar
    stivio Posts: 1, Reputation: 1
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    #9

    Nov 20, 2010, 11:51 AM
    One must maintain 3 ft./ 1 M from Roof or Building Overhang...
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