Heating and cooling for a small space – GreenBuildingAdvisor

Hi folks

I’m looking for ideas for heating and cooling for a standalone  small  (150 square foot)  outbuilding that will serve as a home office.  This in in western oregon (zone 4c).  The space will be well insulated (r30 wall and r60 ceiling) and reasonably air sealed. I am looking for something I can install myself and would be sized for a small space.  I have started by looking at minisplits and point terminal heat pumps and am curious about their relative merits as well as any other options.

Thanks,

Chris