Who makes 5 liter beer kegs?
generally you want a two inch space between a furnace vent and any combustable materialit could be more depending on the furnaces requirementssuggest you contact the manufacturer and run the question by them.
Are you trying to keep the heat out of the attic or are you trying yo keep the attic coolYou only insulate the floor of an attic to keep the heat in the floor belowIf you have rooms in the attic you need to insulate the ceiling not the floor.
My experience is use faced insulation for walls as it acts as a vapor barrierFor floors, say between drywall below attached to rafters, then I would always use unfaced in the 3.5 or 5.5 space between new floor and ceiling belowYou need the fine air flow you will get but also a way for any humidity to disperseEven attics with no renovation use unfaced or blown in insulationThe facing may negate the soffits and other ventilation your attic needs.
Unfaced insullation is your only optionFaced insulation is designed for extreme temperature differrences that mandates some moisture dispensationThe key word being 'some'! If you chose not to include your attic renevation as a part of the 'whole' climate controlled space , then you are setting -up yourself for a world of hurt that includes quick evolving resperatory diseasesConcentrate on solid air-flow directly under the roof sheathing from the soffits to the peakThe 'dams' between ceiling and roof allow for insulation and preserve the longivity of the roof it's-selfFiberglass is the prefered material in this scenarioUpgrades include aluminum sheeting and powered fans.
First, and I could be wrong about this, I do not believe that macro-brews like Bud Light and it's ilk are available in the 5-liter keg formatSo, even if you find a place with a good selection of 5-liter mini-kegs, I think you'll be out of luckSecond, where in Ohio do you live? I could probably drum up some decent suggestions of places to call or visit in the Columbus area, but that would do you little good if you were in, say, Akron.