Low or Floor Level Heat Ducts? Pic Examples?

[ToolsRCool]

Putting a conventional home furnace up in the attic of my garage rebuild, will be a horizontal natural gas high efficiency unit. Wanting to get the most out of it, so thinking to have the heat exit near the floor level to rise using some ducting, rather than having to fill the room from the top down. 26x24 footprint garage, Michigan winter climate. Will do single cold air return also low mounted in a cold corner.

Has anybody done similar? Any pic examples of ducting that is not simply overhead? Will hate it being in the way, but hoping to minimize such by making it low profile or round or ?????? I think using an exterior wall cavity for the duct will cool it too much and lose more than what I am trying to gain? Should I just try to dump it mid-wall level with angled down vents, and use ceiling fans on low to push and hold it down?

Open to ideas, pics, insults, etc.....thanks.

 

[larry4406]

You heating the attic or the garage below?

Here are some pics of my prior shop where I had horizontal furnace at garage ceiling level with ceiling ductwork. Note the 2 cold air returns - one vertical and one horizontal. I had a work bench below the furnace.

It has a full attic above. I had planned to finish the attic as living space so this HVAC was fully divorced from above and fully firestopped.

 

[ToolsRCool]

Beautiful setup. Attic likely just heated from the warm air rising. It will mostly be a storage space, maybe evict my daughters wood lathe and such to be up there.