small office cabin hydronic heating with air-to-water heat pump – GreenBuildingAdvisor

Hi,

I am building a 420 ft2 home office cabin that will also serve as a sleeping cabin when we have guests in our main house.  In the main house I installed a Viessmann combi propane gas boiler to serve the radiant heat floors and DHW.  In this cabin, we will only need heat, cooling and electricity.  I had decided that we would use an air source heat pump mini-split to manage that. The DIY version s are ~ $1,300. But ideally we could find a way to heat via radiant, which we love.  We will pour a slab so I could install hydronic piping, but I am not finding a small air to water heat pump for this small application.  Moreover the air-to-water cooling systems seem complicated.  So I am writing just to see if anyone would talk me out of the mini-split idea.  I would surely love the radiant option if we could do it.