[Drake]

I am installing a high mass concrete floor 16x40 that will have hydro radiant tubing in it for heating but the floor also will have large exposure to southern windows for passive solar gains. Direct sunlight will hit about 1/3 of the 16' depth of the room on sunny days. About the first 3' will be shaded by low knee wall under windows, the next 6-7' in direct light and the last 5' or so again shade. I am exploring the possible advantage of using fluid in tube to xfr solar heat gain throughout the whole floor not in direct light. Anyone know of any this?? Possible that the direct light hitting is not far off center of the fairly narrow/long floor and with diffuse light might already store heat pretty evenly. Can an existing radiant loop be used without adding more heat to make it flow?? Maybe a second loop of tubing? Floor surface will be a dark ceramic tile(shaded in summer). Curious of anyones experiences.