I will be finishing off the area above the detached garage in the coming months and have started looking at HVAC for the space. It is 20 x 44 with a single bedroom and bathroom and the rest open space. It is well insulated, here in MD we don't usually get extended periods of extreme cold, but could be below freezing for a few weeks straight. I thought I would ask what you all are using for HVAC and how well you like your systems.
In the house I use a coal stoker for primary heat and have a propane furnace for backup along with the 10yo central AC for the summer. I'd rather not use propane since the logistics of running a line from the existing buried 1000 gal tank would be a long run and not be easy. The workshop which is under this new space also has a coal stoker which i start up intermittently if cold enough and I am doing enough project out there to require it.
From recent research I am leaning toward a mini split unit up there which I think would work well given the smaller size. I don't want to use electric baseboard.
There have been a couple threads touching on this, some older so I thought I'd ask for some more recent info to be shared. It may also be useful for others to see your pro's and con's if they are in the situation of having to upgrade the systems on their homes.