direct-vent top-vent wall furnace

  1. puddi

    Direct vent vs top vent recessed furnace

    I'm going to install a wall-recessed furnace and would appreciate some information. I'm puzzled by the very different venting requirements of the "top vent" vs "direct vent" recessed furnaces. From the names alone, the only difference is the source of combustion air. But there's obviously...
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