radiant cooling via slab

hot_rod

I turning part of the shop into a ADU. About 750 sq ft, well insulated, just an insulated OH ad man door right now. 4" slab 1/2" tube 6" on center, 250' lengths

90° outside yesterday, 12% humidity in Salt Lake

The system dropped from 80 inside to 75 over the course of about 8 hr. SWT 51°

I turned off the HP but left the pump run through the night.

72° this morning in the space. So the flywheel effect causes some overshoot, as expected.

The loft, 15' ceiling area, was just a few degrees warmer, a shot of the hanging thermometer at 74.8°, which was good to see,. No air movement at this point.

I was thinking a 2 ton hydronic air handler for cooling . Maybe not, just a HV unit to move some air around? It would be nice not to add ductiong with these exposed ceilings.